diff --git a/src/test/java/com/android/tools/r8/ToolHelper.java b/src/test/java/com/android/tools/r8/ToolHelper.java
index 3853ced..cd1dcbc 100644
--- a/src/test/java/com/android/tools/r8/ToolHelper.java
+++ b/src/test/java/com/android/tools/r8/ToolHelper.java
@@ -10,6 +10,7 @@
 import static org.junit.Assert.fail;
 
 import com.android.tools.r8.DeviceRunner.DeviceRunnerConfigurationException;
+import com.android.tools.r8.TestBase.Backend;
 import com.android.tools.r8.ToolHelper.DexVm.Kind;
 import com.android.tools.r8.dex.ApplicationReader;
 import com.android.tools.r8.errors.Unreachable;
@@ -585,6 +586,13 @@
     return PROGUARD6_0_1 + ".sh";
   }
 
+  public static Backend[] getBackends() {
+    if (getDexVm() == DexVm.ART_DEFAULT) {
+      return Backend.values();
+    }
+    return new Backend[]{Backend.DEX};
+  }
+
   private static String getRetraceScript() {
     if (isWindows()) {
       return RETRACE + ".bat";
diff --git a/src/test/java/com/android/tools/r8/accessrelaxation/ConstructorRelaxationTest.java b/src/test/java/com/android/tools/r8/accessrelaxation/ConstructorRelaxationTest.java
index 3bdfa7e..beb9235 100644
--- a/src/test/java/com/android/tools/r8/accessrelaxation/ConstructorRelaxationTest.java
+++ b/src/test/java/com/android/tools/r8/accessrelaxation/ConstructorRelaxationTest.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertTrue;
 
 import com.android.tools.r8.R8TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -160,7 +161,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ConstructorRelaxationTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/accessrelaxation/NoRelaxationForSerializableTest.java b/src/test/java/com/android/tools/r8/accessrelaxation/NoRelaxationForSerializableTest.java
index 8fc4c6f..08b378d 100644
--- a/src/test/java/com/android/tools/r8/accessrelaxation/NoRelaxationForSerializableTest.java
+++ b/src/test/java/com/android/tools/r8/accessrelaxation/NoRelaxationForSerializableTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.R8TestCompileResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.naming.MemberNaming.MethodSignature;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.FileUtils;
@@ -100,7 +101,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}, access-modification: {1}")
   public static List<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public NoRelaxationForSerializableTest(Backend backend, boolean accessModification) {
diff --git a/src/test/java/com/android/tools/r8/accessrelaxation/NonConstructorRelaxationTest.java b/src/test/java/com/android/tools/r8/accessrelaxation/NonConstructorRelaxationTest.java
index a6e1aa7..e99a3d4 100644
--- a/src/test/java/com/android/tools/r8/accessrelaxation/NonConstructorRelaxationTest.java
+++ b/src/test/java/com/android/tools/r8/accessrelaxation/NonConstructorRelaxationTest.java
@@ -35,7 +35,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}, argument removal: {1}")
   public static List<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public NonConstructorRelaxationTest(Backend backend, boolean enableArgumentRemoval) {
diff --git a/src/test/java/com/android/tools/r8/cf/DebugInfoTestRunner.java b/src/test/java/com/android/tools/r8/cf/DebugInfoTestRunner.java
index 001c520..ebae273 100644
--- a/src/test/java/com/android/tools/r8/cf/DebugInfoTestRunner.java
+++ b/src/test/java/com/android/tools/r8/cf/DebugInfoTestRunner.java
@@ -5,6 +5,7 @@
 
 import com.android.tools.r8.R8TestBuilder;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import java.nio.file.Path;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -18,7 +19,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/classmerging/InliningAfterStaticClassMergerTest.java b/src/test/java/com/android/tools/r8/classmerging/InliningAfterStaticClassMergerTest.java
index 4a331a7..2e2a772 100644
--- a/src/test/java/com/android/tools/r8/classmerging/InliningAfterStaticClassMergerTest.java
+++ b/src/test/java/com/android/tools/r8/classmerging/InliningAfterStaticClassMergerTest.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -63,7 +64,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   @Test
diff --git a/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerInterfaceTest.java b/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerInterfaceTest.java
index 294eca0..52d195c 100644
--- a/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerInterfaceTest.java
+++ b/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerInterfaceTest.java
@@ -27,7 +27,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StaticClassMergerInterfaceTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerTest.java b/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerTest.java
index ff76f08..d3ef317 100644
--- a/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerTest.java
+++ b/src/test/java/com/android/tools/r8/classmerging/StaticClassMergerTest.java
@@ -9,6 +9,7 @@
 import com.android.tools.r8.AssumeMayHaveSideEffects;
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.FoundClassSubject;
@@ -56,7 +57,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   @Test
diff --git a/src/test/java/com/android/tools/r8/classmerging/StaticInitializerTest.java b/src/test/java/com/android/tools/r8/classmerging/StaticInitializerTest.java
index ce89fe1..72c9e57 100644
--- a/src/test/java/com/android/tools/r8/classmerging/StaticInitializerTest.java
+++ b/src/test/java/com/android/tools/r8/classmerging/StaticInitializerTest.java
@@ -6,6 +6,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -19,7 +20,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StaticInitializerTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java b/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
index 4a7494b..678e2da 100644
--- a/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
+++ b/src/test/java/com/android/tools/r8/compatproguard/reflection/ReflectionTest.java
@@ -451,7 +451,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ReflectionTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/debug/LoadInvokeLoadOptimizationTestRunner.java b/src/test/java/com/android/tools/r8/debug/LoadInvokeLoadOptimizationTestRunner.java
index f741381..785db86 100644
--- a/src/test/java/com/android/tools/r8/debug/LoadInvokeLoadOptimizationTestRunner.java
+++ b/src/test/java/com/android/tools/r8/debug/LoadInvokeLoadOptimizationTestRunner.java
@@ -4,6 +4,7 @@
 package com.android.tools.r8.debug;
 
 import com.android.tools.r8.CompilationMode;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.debug.DebugTestBase.JUnit3Wrapper.FrameInspector;
 import com.android.tools.r8.utils.DescriptorUtils;
 import java.util.List;
@@ -30,7 +31,7 @@
         parameters()
             .add("CF", temp -> testForJvm(temp).addTestClasspath().debugConfig())
             .add("D8", temp -> testForD8(temp).addProgramClasses(CLASS).debugConfig());
-    for (Backend backend : Backend.values()) {
+    for (Backend backend : ToolHelper.getBackends()) {
       parameters.add(
           "R8/" + backend,
           temp ->
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/B116282409.java b/src/test/java/com/android/tools/r8/ir/optimize/B116282409.java
index 6008aab..3af47cc 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/B116282409.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/B116282409.java
@@ -45,7 +45,7 @@
 
   @Parameters(name = "Backend: {0}, vertical class merging: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public B116282409(Backend backend, boolean enableVerticalClassMerging) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/CatchHandlerRemovalTest.java b/src/test/java/com/android/tools/r8/ir/optimize/CatchHandlerRemovalTest.java
index 07e795c..14fc7af 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/CatchHandlerRemovalTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/CatchHandlerRemovalTest.java
@@ -5,6 +5,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -17,7 +18,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public CatchHandlerRemovalTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/IdempotentFunctionCallCanonicalizationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/IdempotentFunctionCallCanonicalizationTest.java
index bb2fc3a..5c731fc 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/IdempotentFunctionCallCanonicalizationTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/IdempotentFunctionCallCanonicalizationTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -94,7 +95,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public IdempotentFunctionCallCanonicalizationTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/MemberValuePropagationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/MemberValuePropagationTest.java
index d185654..640a20d 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/MemberValuePropagationTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/MemberValuePropagationTest.java
@@ -47,7 +47,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MemberValuePropagationTest(TestBase.Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/NonNullParamTest.java b/src/test/java/com/android/tools/r8/ir/optimize/NonNullParamTest.java
index 44497b5..0c66575 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/NonNullParamTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/NonNullParamTest.java
@@ -9,6 +9,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ir.optimize.nonnull.IntrinsicsDeputy;
 import com.android.tools.r8.ir.optimize.nonnull.NonNullParamAfterInvokeDirect;
 import com.android.tools.r8.ir.optimize.nonnull.NonNullParamAfterInvokeInterface;
@@ -39,7 +40,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public NonNullParamTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/R8InliningTest.java b/src/test/java/com/android/tools/r8/ir/optimize/R8InliningTest.java
index c9e5f1e..f9192db 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/R8InliningTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/R8InliningTest.java
@@ -51,7 +51,7 @@
   public static Collection<Object[]> data() {
     return buildParameters(
         ImmutableList.of("Inlining"),
-        Backend.values(),
+        ToolHelper.getBackends(),
         BooleanUtils.values(),
         BooleanUtils.values());
   }
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/RedundantConstNumberRemovalTest.java b/src/test/java/com/android/tools/r8/ir/optimize/RedundantConstNumberRemovalTest.java
index e2f47cd..ffac704 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/RedundantConstNumberRemovalTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/RedundantConstNumberRemovalTest.java
@@ -13,6 +13,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.R8TestRunResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ir.code.BasicBlock;
 import com.android.tools.r8.ir.code.IRCode;
 import com.android.tools.r8.ir.code.Instruction;
@@ -34,7 +35,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public RedundantConstNumberRemovalTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/SubsumedCatchHandlerTest.java b/src/test/java/com/android/tools/r8/ir/optimize/SubsumedCatchHandlerTest.java
index e31325b..65c1496 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/SubsumedCatchHandlerTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/SubsumedCatchHandlerTest.java
@@ -11,6 +11,7 @@
 import com.android.tools.r8.ForceInline;
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.cf.code.CfTryCatch;
 import com.android.tools.r8.graph.CfCode;
 import com.android.tools.r8.graph.Code;
@@ -66,7 +67,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
index 0033eb2..52a1f72 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
@@ -41,7 +41,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public CheckCastDebugTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastRemovalTest.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastRemovalTest.java
index ac3b267..33eed50 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastRemovalTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastRemovalTest.java
@@ -6,6 +6,7 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.ProcessResult;
 import com.android.tools.r8.jasmin.JasminBuilder;
 import com.android.tools.r8.jasmin.JasminBuilder.ClassBuilder;
@@ -29,7 +30,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/IllegalAccessErrorTest.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/IllegalAccessErrorTest.java
index c575fb0..2687c27 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/IllegalAccessErrorTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/IllegalAccessErrorTest.java
@@ -25,7 +25,7 @@
 
   @Parameterized.Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
 
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/NullCheckCastTest.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/NullCheckCastTest.java
index ab915f6..d6552a7 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/NullCheckCastTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/NullCheckCastTest.java
@@ -42,7 +42,7 @@
 
   @Parameterized.Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public NullCheckCastTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/classinliner/BuilderWithInheritanceTest.java b/src/test/java/com/android/tools/r8/ir/optimize/classinliner/BuilderWithInheritanceTest.java
index c3deab3..0c38e45 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/classinliner/BuilderWithInheritanceTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/classinliner/BuilderWithInheritanceTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -24,7 +25,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public BuilderWithInheritanceTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/classinliner/ClassInlinerTest.java b/src/test/java/com/android/tools/r8/ir/optimize/classinliner/ClassInlinerTest.java
index b69569f..5a033cd 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/classinliner/ClassInlinerTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/classinliner/ClassInlinerTest.java
@@ -16,6 +16,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.ProcessResult;
 import com.android.tools.r8.ir.optimize.classinliner.builders.BuildersTestClass;
 import com.android.tools.r8.ir.optimize.classinliner.builders.ControlFlow;
@@ -67,7 +68,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ClassInlinerTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/DevirtualizerNonNullRewritingTest.java b/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/DevirtualizerNonNullRewritingTest.java
index cef7f1b..12bce34 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/DevirtualizerNonNullRewritingTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/DevirtualizerNonNullRewritingTest.java
@@ -7,6 +7,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -19,7 +20,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public DevirtualizerNonNullRewritingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/InvokeInterfaceToInvokeVirtualTest.java b/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/InvokeInterfaceToInvokeVirtualTest.java
index d78628f..171dac4 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/InvokeInterfaceToInvokeVirtualTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/devirtualize/InvokeInterfaceToInvokeVirtualTest.java
@@ -35,7 +35,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InvokeInterfaceToInvokeVirtualTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlineSynchronizedTest.java b/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlineSynchronizedTest.java
index 519c273..d45d19e 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlineSynchronizedTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlineSynchronizedTest.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexString;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.InternalOptions;
@@ -38,7 +39,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}, ClassInlining: {1}")
   public static Collection data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlinerTest.java b/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlinerTest.java
index 8945415..74b2a56 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlinerTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/inliner/InlinerTest.java
@@ -43,7 +43,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InlinerTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/InstanceOfRemovalTest.java b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/InstanceOfRemovalTest.java
index 0194a1a..f931dcd 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/InstanceOfRemovalTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/InstanceOfRemovalTest.java
@@ -8,6 +8,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -111,7 +112,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedAnnotationTypeTest.java b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedAnnotationTypeTest.java
index 987623a..7f61c30 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedAnnotationTypeTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedAnnotationTypeTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.InstructionSubject;
@@ -59,7 +60,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedLibraryTypeTest.java b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedLibraryTypeTest.java
index 6da0470..cff27b4 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedLibraryTypeTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedLibraryTypeTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.InstructionSubject;
@@ -60,7 +61,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedProgramTypeTest.java b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedProgramTypeTest.java
index a9568db..df2739a 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedProgramTypeTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/instanceofremoval/UninstantiatedProgramTypeTest.java
@@ -11,6 +11,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.InstructionSubject;
@@ -59,7 +60,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetClassTest.java b/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetClassTest.java
index df06e95..3aa4d9f 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetClassTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetClassTest.java
@@ -13,6 +13,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -133,7 +134,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public GetClassTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetNameTestBase.java b/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetNameTestBase.java
index 979d911..7d10303 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetNameTestBase.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/reflection/GetNameTestBase.java
@@ -27,7 +27,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} minification: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   GetNameTestBase(Backend backend, boolean enableMinification) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/reflection/InnerClassNameTestRunner.java b/src/test/java/com/android/tools/r8/ir/optimize/reflection/InnerClassNameTestRunner.java
index 167d953..f2c24b2 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/reflection/InnerClassNameTestRunner.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/reflection/InnerClassNameTestRunner.java
@@ -116,7 +116,7 @@
 
   @Parameters(name = "{0} minify:{1} {2}")
   public static Collection<Object[]> parameters() {
-    return buildParameters(Backend.values(), BooleanUtils.values(), TestNamingConfig.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values(), TestNamingConfig.values());
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/staticizer/ClassStaticizerTest.java b/src/test/java/com/android/tools/r8/ir/optimize/staticizer/ClassStaticizerTest.java
index 3f4801d..b5071f4 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/staticizer/ClassStaticizerTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/staticizer/ClassStaticizerTest.java
@@ -16,6 +16,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.code.Instruction;
 import com.android.tools.r8.code.InvokeDirect;
 import com.android.tools.r8.code.InvokeStatic;
@@ -63,7 +64,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ClassStaticizerTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/NestedStringBuilderTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/NestedStringBuilderTest.java
index a73b766..efaec9f 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/NestedStringBuilderTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/NestedStringBuilderTest.java
@@ -8,6 +8,7 @@
 import com.android.tools.r8.ForceInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestCompileResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.MethodSubject;
@@ -35,7 +36,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public NestedStringBuilderTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringCanonicalizationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringCanonicalizationTest.java
index cf3f64b..ad540ff 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringCanonicalizationTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringCanonicalizationTest.java
@@ -11,6 +11,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestCompileResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.InstructionSubject.JumboStringMode;
@@ -131,7 +132,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringCanonicalizationTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringConcatenationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringConcatenationTest.java
index 7acb30d..3b67c93 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringConcatenationTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringConcatenationTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.R8TestRunResult;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -39,7 +40,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringContentCheckTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringContentCheckTest.java
index 5e4e5f1..7a220d5 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringContentCheckTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringContentCheckTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -180,7 +181,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringContentCheckTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringInMonitorTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringInMonitorTest.java
index 0b049e3..17726e9 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringInMonitorTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringInMonitorTest.java
@@ -13,6 +13,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -85,7 +86,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringInMonitorTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringIsEmptyTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringIsEmptyTest.java
index 0de9105..ec0fe1b 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringIsEmptyTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringIsEmptyTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -65,7 +66,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringIsEmptyTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringLengthTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringLengthTest.java
index 2d1d0a5..91de9bc 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringLengthTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringLengthTest.java
@@ -98,7 +98,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringLengthTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringToStringTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringToStringTest.java
index 60a7c1f..60b6f43 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringToStringTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringToStringTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -64,7 +65,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringToStringTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringValueOfTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringValueOfTest.java
index f8f5fa4..10b1063 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/string/StringValueOfTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringValueOfTest.java
@@ -13,6 +13,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestRunResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.InternalOptions;
 import com.android.tools.r8.utils.StringUtils;
@@ -130,7 +131,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StringValueOfTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InterfaceMethodTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InterfaceMethodTest.java
index b609c1e..6346a37 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InterfaceMethodTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InterfaceMethodTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -26,7 +27,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InterfaceMethodTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithNonNullParamCheckTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithNonNullParamCheckTest.java
index d39062d..6298428 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithNonNullParamCheckTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithNonNullParamCheckTest.java
@@ -11,6 +11,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -39,7 +40,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InvokeMethodWithNonNullParamCheckTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithReceiverOptimizationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithReceiverOptimizationTest.java
index 2a805b14..6d2bf67 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithReceiverOptimizationTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/InvokeMethodWithReceiverOptimizationTest.java
@@ -12,6 +12,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -37,7 +38,7 @@
 
   @Parameters(name = "Backend: {0}, enable argument removal: {1}")
   public static List<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public InvokeMethodWithReceiverOptimizationTest(Backend backend, boolean enableArgumentRemoval) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/LambdaInstantiatedTypeTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/LambdaInstantiatedTypeTest.java
index bcde05c..063ebf4 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/LambdaInstantiatedTypeTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/LambdaInstantiatedTypeTest.java
@@ -8,6 +8,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -27,7 +28,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public LambdaInstantiatedTypeTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/ParameterRewritingTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/ParameterRewritingTest.java
index e685ae5..b9e8f15 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/ParameterRewritingTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/ParameterRewritingTest.java
@@ -11,6 +11,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.DexMethod;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -28,7 +29,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ParameterRewritingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/VoidReturnTypeRewritingTest.java b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/VoidReturnTypeRewritingTest.java
index e443368..5afad95 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/VoidReturnTypeRewritingTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/uninstantiatedtypes/VoidReturnTypeRewritingTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.NeverMerge;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -26,7 +27,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public VoidReturnTypeRewritingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsBootstrapTest.java b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsBootstrapTest.java
index 3001335..0d3f3cb 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsBootstrapTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsBootstrapTest.java
@@ -5,6 +5,7 @@
 package com.android.tools.r8.ir.optimize.unusedarguments;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -17,7 +18,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public UnusedArgumentsBootstrapTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorCollisionTest.java b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorCollisionTest.java
index 3b0603c..1e24b24 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorCollisionTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorCollisionTest.java
@@ -5,6 +5,7 @@
 package com.android.tools.r8.ir.optimize.unusedarguments;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -19,7 +20,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] parameters() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public UnusedArgumentsInstanceConstructorCollisionTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorTest.java b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorTest.java
index 20d7bae..0d97f02 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/unusedarguments/UnusedArgumentsInstanceConstructorTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.NeverClassInline;
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -28,7 +29,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public UnusedArgumentsInstanceConstructorTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/jasmin/Regress65432240.java b/src/test/java/com/android/tools/r8/jasmin/Regress65432240.java
index 458ddbc..e34c8b1 100644
--- a/src/test/java/com/android/tools/r8/jasmin/Regress65432240.java
+++ b/src/test/java/com/android/tools/r8/jasmin/Regress65432240.java
@@ -29,7 +29,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public Regress65432240(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/kotlin/MetadataStripTest.java b/src/test/java/com/android/tools/r8/kotlin/MetadataStripTest.java
index eca25fb..572ae96 100644
--- a/src/test/java/com/android/tools/r8/kotlin/MetadataStripTest.java
+++ b/src/test/java/com/android/tools/r8/kotlin/MetadataStripTest.java
@@ -40,7 +40,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} target: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), KotlinTargetVersion.values());
+    return buildParameters(ToolHelper.getBackends(), KotlinTargetVersion.values());
   }
 
   public MetadataStripTest(Backend backend, KotlinTargetVersion targetVersion) {
diff --git a/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinReflectionLibTest.java b/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinReflectionLibTest.java
index 700e2d4..b58ed1e 100644
--- a/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinReflectionLibTest.java
+++ b/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinReflectionLibTest.java
@@ -22,7 +22,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} target: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), KotlinTargetVersion.values());
+    return buildParameters(ToolHelper.getBackends(), KotlinTargetVersion.values());
   }
 
   private void test(String... rules) throws Exception {
diff --git a/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinStdlibTest.java b/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinStdlibTest.java
index f796046..904647f 100644
--- a/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinStdlibTest.java
+++ b/src/test/java/com/android/tools/r8/kotlin/ProcessKotlinStdlibTest.java
@@ -22,7 +22,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} target: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), KotlinTargetVersion.values());
+    return buildParameters(ToolHelper.getBackends(), KotlinTargetVersion.values());
   }
 
   private void test(String... rules) throws Exception {
diff --git a/src/test/java/com/android/tools/r8/memberrebinding/IllegalFieldRebindingTest.java b/src/test/java/com/android/tools/r8/memberrebinding/IllegalFieldRebindingTest.java
index cc35cbd..b822934 100644
--- a/src/test/java/com/android/tools/r8/memberrebinding/IllegalFieldRebindingTest.java
+++ b/src/test/java/com/android/tools/r8/memberrebinding/IllegalFieldRebindingTest.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.memberrebinding.testclasses.IllegalFieldRebindingTestClasses;
 import com.android.tools.r8.memberrebinding.testclasses.IllegalFieldRebindingTestClasses.B;
 import com.android.tools.r8.utils.StringUtils;
@@ -28,7 +29,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public IllegalFieldRebindingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/memberrebinding/IndirectSuperInterfaceTest.java b/src/test/java/com/android/tools/r8/memberrebinding/IndirectSuperInterfaceTest.java
index 977b925..9993999 100644
--- a/src/test/java/com/android/tools/r8/memberrebinding/IndirectSuperInterfaceTest.java
+++ b/src/test/java/com/android/tools/r8/memberrebinding/IndirectSuperInterfaceTest.java
@@ -5,6 +5,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.google.common.collect.ImmutableList;
 import java.util.List;
@@ -132,7 +133,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] setup() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public IndirectSuperInterfaceTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/memberrebinding/MemberRebindingTest.java b/src/test/java/com/android/tools/r8/memberrebinding/MemberRebindingTest.java
index 4c54504..6175d7a 100644
--- a/src/test/java/com/android/tools/r8/memberrebinding/MemberRebindingTest.java
+++ b/src/test/java/com/android/tools/r8/memberrebinding/MemberRebindingTest.java
@@ -332,7 +332,7 @@
   @Parameters(name = "{0}")
   public static Collection<TestConfiguration> data() {
     ImmutableList.Builder<TestConfiguration> builder = ImmutableList.builder();
-    for (Backend backend : Backend.values()) {
+    for (Backend backend : ToolHelper.getBackends()) {
       TestConfiguration.add(
           builder,
           "memberrebinding",
diff --git a/src/test/java/com/android/tools/r8/movestringconstants/MoveStringConstantsTest.java b/src/test/java/com/android/tools/r8/movestringconstants/MoveStringConstantsTest.java
index 967277c..d9b3cd4 100644
--- a/src/test/java/com/android/tools/r8/movestringconstants/MoveStringConstantsTest.java
+++ b/src/test/java/com/android/tools/r8/movestringconstants/MoveStringConstantsTest.java
@@ -36,7 +36,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private void runTest(Consumer<CodeInspector> inspection) throws Exception {
diff --git a/src/test/java/com/android/tools/r8/naming/AdaptResourceFileContentsTest.java b/src/test/java/com/android/tools/r8/naming/AdaptResourceFileContentsTest.java
index 15599ef..93d89cf 100644
--- a/src/test/java/com/android/tools/r8/naming/AdaptResourceFileContentsTest.java
+++ b/src/test/java/com/android/tools/r8/naming/AdaptResourceFileContentsTest.java
@@ -18,6 +18,7 @@
 import com.android.tools.r8.DataResourceProvider.Visitor;
 import com.android.tools.r8.DiagnosticsHandler;
 import com.android.tools.r8.TestCompileResult;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.shaking.forceproguardcompatibility.ProguardCompatibilityTestBase;
 import com.android.tools.r8.utils.ArchiveResourceProvider;
@@ -52,7 +53,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AdaptResourceFileContentsTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/AdaptResourceFileNamesTest.java b/src/test/java/com/android/tools/r8/naming/AdaptResourceFileNamesTest.java
index 40f4249..8c2dafc 100644
--- a/src/test/java/com/android/tools/r8/naming/AdaptResourceFileNamesTest.java
+++ b/src/test/java/com/android/tools/r8/naming/AdaptResourceFileNamesTest.java
@@ -51,7 +51,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AdaptResourceFileNamesTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/AvoidRTest.java b/src/test/java/com/android/tools/r8/naming/AvoidRTest.java
index 4633b36..2d48d5c 100644
--- a/src/test/java/com/android/tools/r8/naming/AvoidRTest.java
+++ b/src/test/java/com/android/tools/r8/naming/AvoidRTest.java
@@ -10,6 +10,7 @@
 import static org.junit.Assert.assertTrue;
 
 import com.android.tools.r8.R8TestBuilder;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.jasmin.JasminBuilder;
 import com.android.tools.r8.jasmin.JasminTestBase;
 import com.android.tools.r8.utils.FileUtils;
@@ -29,7 +30,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AvoidRTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/EnumMinification.java b/src/test/java/com/android/tools/r8/naming/EnumMinification.java
index 322a879..2b6ff48 100644
--- a/src/test/java/com/android/tools/r8/naming/EnumMinification.java
+++ b/src/test/java/com/android/tools/r8/naming/EnumMinification.java
@@ -36,7 +36,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public EnumMinification(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/EnumMinificationKotlinTest.java b/src/test/java/com/android/tools/r8/naming/EnumMinificationKotlinTest.java
index bdb3330..cd1520e 100644
--- a/src/test/java/com/android/tools/r8/naming/EnumMinificationKotlinTest.java
+++ b/src/test/java/com/android/tools/r8/naming/EnumMinificationKotlinTest.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.KotlinTestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.KotlinTargetVersion;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -31,7 +32,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} target: {1} minify: {2}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), KotlinTargetVersion.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), KotlinTargetVersion.values(), BooleanUtils.values());
   }
 
   public EnumMinificationKotlinTest(
diff --git a/src/test/java/com/android/tools/r8/naming/IdentifierMinifierTest.java b/src/test/java/com/android/tools/r8/naming/IdentifierMinifierTest.java
index 9aa9a0f..7fa8b54 100644
--- a/src/test/java/com/android/tools/r8/naming/IdentifierMinifierTest.java
+++ b/src/test/java/com/android/tools/r8/naming/IdentifierMinifierTest.java
@@ -112,7 +112,7 @@
 
     // Duplicate parameters for each backend.
     List<Object[]> parametersWithBackend = new ArrayList<>();
-    for (Backend backend : Backend.values()) {
+    for (Backend backend : ToolHelper.getBackends()) {
       for (Object[] row : parameters) {
         Object[] newRow = new Object[row.length + 1];
         newRow[0] = backend;
diff --git a/src/test/java/com/android/tools/r8/naming/MinifierClassSignatureTest.java b/src/test/java/com/android/tools/r8/naming/MinifierClassSignatureTest.java
index 410ae0a..342019f 100644
--- a/src/test/java/com/android/tools/r8/naming/MinifierClassSignatureTest.java
+++ b/src/test/java/com/android/tools/r8/naming/MinifierClassSignatureTest.java
@@ -68,7 +68,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MinifierClassSignatureTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/MinifierFieldSignatureTest.java b/src/test/java/com/android/tools/r8/naming/MinifierFieldSignatureTest.java
index 1c4e31b..c19ba39 100644
--- a/src/test/java/com/android/tools/r8/naming/MinifierFieldSignatureTest.java
+++ b/src/test/java/com/android/tools/r8/naming/MinifierFieldSignatureTest.java
@@ -65,7 +65,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MinifierFieldSignatureTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/MinifierMethodSignatureTest.java b/src/test/java/com/android/tools/r8/naming/MinifierMethodSignatureTest.java
index 3c74a5b..ec33a57 100644
--- a/src/test/java/com/android/tools/r8/naming/MinifierMethodSignatureTest.java
+++ b/src/test/java/com/android/tools/r8/naming/MinifierMethodSignatureTest.java
@@ -68,7 +68,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MinifierMethodSignatureTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/RenameSourceFileDebugTest.java b/src/test/java/com/android/tools/r8/naming/RenameSourceFileDebugTest.java
index 2ef1f5e..87a2fb2 100644
--- a/src/test/java/com/android/tools/r8/naming/RenameSourceFileDebugTest.java
+++ b/src/test/java/com/android/tools/r8/naming/RenameSourceFileDebugTest.java
@@ -34,7 +34,7 @@
 
   @BeforeClass
   public static void initDebuggeePath() throws Exception {
-    for (Backend backend : Backend.values()) {
+    for (Backend backend : ToolHelper.getBackends()) {
       Path outdir = temp.newFolder().toPath();
       Path outjar = outdir.resolve("r8_compiled.jar");
       Path proguardMapPath = outdir.resolve("proguard.map");
@@ -75,7 +75,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public RenameSourceFileDebugTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/WarnReflectiveAccessTest.java b/src/test/java/com/android/tools/r8/naming/WarnReflectiveAccessTest.java
index 74e6471..3652285 100644
--- a/src/test/java/com/android/tools/r8/naming/WarnReflectiveAccessTest.java
+++ b/src/test/java/com/android/tools/r8/naming/WarnReflectiveAccessTest.java
@@ -70,7 +70,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public WarnReflectiveAccessTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterDevirtualizationTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterDevirtualizationTest.java
index 7ef141e..a13a5f6 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterDevirtualizationTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterDevirtualizationTest.java
@@ -9,6 +9,7 @@
 
 import com.android.tools.r8.R8TestCompileResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Assume;
@@ -81,7 +82,7 @@
 
   @Parameterized.Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ApplyMappingAfterDevirtualizationTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingFieldTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingFieldTest.java
index c97dbfb..1ccdfdd 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingFieldTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingFieldTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.R8TestCompileResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Assume;
@@ -69,7 +70,7 @@
 
   @Parameterized.Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ApplyMappingAfterHorizontalMergingFieldTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingMethodTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingMethodTest.java
index 360dd90..9e370a7 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingMethodTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterHorizontalMergingMethodTest.java
@@ -11,6 +11,7 @@
 import com.android.tools.r8.NeverPropagateValue;
 import com.android.tools.r8.R8TestCompileResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Assume;
@@ -76,7 +77,7 @@
 
   @Parameterized.Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ApplyMappingAfterHorizontalMergingMethodTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterVerticalMergingFieldTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterVerticalMergingFieldTest.java
index a097ea2..c982b0a 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterVerticalMergingFieldTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/ApplyMappingAfterVerticalMergingFieldTest.java
@@ -9,6 +9,7 @@
 
 import com.android.tools.r8.R8TestCompileResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Assume;
@@ -58,7 +59,7 @@
 
   @Parameterized.Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ApplyMappingAfterVerticalMergingFieldTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/ApplyMappingTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/ApplyMappingTest.java
index 6367281..b5e57b5 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/ApplyMappingTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/ApplyMappingTest.java
@@ -58,7 +58,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ApplyMappingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/InnerEnumValuesTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/InnerEnumValuesTest.java
index 913f68d..493ace2 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/InnerEnumValuesTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/InnerEnumValuesTest.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.naming.applymapping.sourcelibrary.Outer.InnerEnum;
 import com.android.tools.r8.utils.FileUtils;
 import com.android.tools.r8.utils.StringUtils;
@@ -34,7 +35,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InnerEnumValuesTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionAsmTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionAsmTest.java
index 38ceec9..a3d3b71 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionAsmTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionAsmTest.java
@@ -41,7 +41,7 @@
 
   @Parameterized.Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MemberResolutionAsmTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionTest.java b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionTest.java
index 95c3a84..99fc246 100644
--- a/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionTest.java
+++ b/src/test/java/com/android/tools/r8/naming/applymapping/sourcelibrary/MemberResolutionTest.java
@@ -82,7 +82,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public MemberResolutionTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/arraytypes/ArrayTypesTest.java b/src/test/java/com/android/tools/r8/naming/arraytypes/ArrayTypesTest.java
index 0ddb8b5..5315868 100644
--- a/src/test/java/com/android/tools/r8/naming/arraytypes/ArrayTypesTest.java
+++ b/src/test/java/com/android/tools/r8/naming/arraytypes/ArrayTypesTest.java
@@ -5,6 +5,7 @@
 package com.android.tools.r8.naming.arraytypes;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.DescriptorUtils;
 import com.android.tools.r8.utils.FileUtils;
 import com.android.tools.r8.utils.StringUtils;
@@ -37,7 +38,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Object[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   @BeforeClass
diff --git a/src/test/java/com/android/tools/r8/naming/b114554345/B114554345.java b/src/test/java/com/android/tools/r8/naming/b114554345/B114554345.java
index 0d2ab3a..6ceff62 100644
--- a/src/test/java/com/android/tools/r8/naming/b114554345/B114554345.java
+++ b/src/test/java/com/android/tools/r8/naming/b114554345/B114554345.java
@@ -21,7 +21,7 @@
 
   @Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public B114554345(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/b116840216/ReserveOuterClassNameTest.java b/src/test/java/com/android/tools/r8/naming/b116840216/ReserveOuterClassNameTest.java
index dec65d1..090626f 100644
--- a/src/test/java/com/android/tools/r8/naming/b116840216/ReserveOuterClassNameTest.java
+++ b/src/test/java/com/android/tools/r8/naming/b116840216/ReserveOuterClassNameTest.java
@@ -55,7 +55,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ReserveOuterClassNameTest(Backend backend){
diff --git a/src/test/java/com/android/tools/r8/naming/b123068484/FieldRenamingTest.java b/src/test/java/com/android/tools/r8/naming/b123068484/FieldRenamingTest.java
index 4cedaea..d2e7349 100644
--- a/src/test/java/com/android/tools/r8/naming/b123068484/FieldRenamingTest.java
+++ b/src/test/java/com/android/tools/r8/naming/b123068484/FieldRenamingTest.java
@@ -37,7 +37,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Object[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public FieldRenamingTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/b126592786/B126592786.java b/src/test/java/com/android/tools/r8/naming/b126592786/B126592786.java
index 0971e8c..e24eb44 100644
--- a/src/test/java/com/android/tools/r8/naming/b126592786/B126592786.java
+++ b/src/test/java/com/android/tools/r8/naming/b126592786/B126592786.java
@@ -10,6 +10,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.FieldSubject;
@@ -31,7 +32,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} minify: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public B126592786(Backend backend, boolean minify) {
diff --git a/src/test/java/com/android/tools/r8/naming/overloadaggressively/OverloadAggressivelyTest.java b/src/test/java/com/android/tools/r8/naming/overloadaggressively/OverloadAggressivelyTest.java
index fa76e46..e034df6 100644
--- a/src/test/java/com/android/tools/r8/naming/overloadaggressively/OverloadAggressivelyTest.java
+++ b/src/test/java/com/android/tools/r8/naming/overloadaggressively/OverloadAggressivelyTest.java
@@ -33,7 +33,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public OverloadAggressivelyTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/overloadaggressively/ValidNameConflictTest.java b/src/test/java/com/android/tools/r8/naming/overloadaggressively/ValidNameConflictTest.java
index 7a1dead..f718cb6 100644
--- a/src/test/java/com/android/tools/r8/naming/overloadaggressively/ValidNameConflictTest.java
+++ b/src/test/java/com/android/tools/r8/naming/overloadaggressively/ValidNameConflictTest.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
 
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.ProcessResult;
 import com.android.tools.r8.jasmin.JasminBuilder;
 import com.android.tools.r8.jasmin.JasminBuilder.ClassBuilder;
@@ -36,7 +37,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ValidNameConflictTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/naming/retrace/DesugarLambdaRetraceTest.java b/src/test/java/com/android/tools/r8/naming/retrace/DesugarLambdaRetraceTest.java
index 4c43c7c..143e65e 100644
--- a/src/test/java/com/android/tools/r8/naming/retrace/DesugarLambdaRetraceTest.java
+++ b/src/test/java/com/android/tools/r8/naming/retrace/DesugarLambdaRetraceTest.java
@@ -10,6 +10,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.CompilationMode;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.naming.retrace.StackTrace.StackTraceLine;
 import com.google.common.collect.ImmutableList;
 import java.util.Collection;
@@ -24,7 +25,7 @@
 
   @Parameters(name = "Backend: {0}, mode: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), CompilationMode.values());
+    return buildParameters(ToolHelper.getBackends(), CompilationMode.values());
   }
 
   public DesugarLambdaRetraceTest(Backend backend, CompilationMode mode) {
diff --git a/src/test/java/com/android/tools/r8/naming/retrace/DesugarStaticInterfaceMethodsRetraceTest.java b/src/test/java/com/android/tools/r8/naming/retrace/DesugarStaticInterfaceMethodsRetraceTest.java
index 8114108..93201b1 100644
--- a/src/test/java/com/android/tools/r8/naming/retrace/DesugarStaticInterfaceMethodsRetraceTest.java
+++ b/src/test/java/com/android/tools/r8/naming/retrace/DesugarStaticInterfaceMethodsRetraceTest.java
@@ -9,6 +9,7 @@
 
 import com.android.tools.r8.CompilationMode;
 import com.android.tools.r8.NeverInline;
+import com.android.tools.r8.ToolHelper;
 import com.google.common.collect.ImmutableList;
 import java.util.Collection;
 import org.junit.Test;
@@ -21,7 +22,7 @@
 
   @Parameters(name = "Backend: {0}, mode: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), CompilationMode.values());
+    return buildParameters(ToolHelper.getBackends(), CompilationMode.values());
   }
 
   public DesugarStaticInterfaceMethodsRetraceTest(Backend backend, CompilationMode mode) {
diff --git a/src/test/java/com/android/tools/r8/naming/retrace/InliningRetraceTest.java b/src/test/java/com/android/tools/r8/naming/retrace/InliningRetraceTest.java
index c252426..fc6d143 100644
--- a/src/test/java/com/android/tools/r8/naming/retrace/InliningRetraceTest.java
+++ b/src/test/java/com/android/tools/r8/naming/retrace/InliningRetraceTest.java
@@ -11,6 +11,7 @@
 
 import com.android.tools.r8.CompilationMode;
 import com.android.tools.r8.ForceInline;
+import com.android.tools.r8.ToolHelper;
 import com.google.common.collect.ImmutableList;
 import java.util.Collection;
 import org.junit.Test;
@@ -23,7 +24,7 @@
 
   @Parameters(name = "Backend: {0}, mode: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), CompilationMode.values());
+    return buildParameters(ToolHelper.getBackends(), CompilationMode.values());
   }
 
   public InliningRetraceTest(Backend backend, CompilationMode mode) {
diff --git a/src/test/java/com/android/tools/r8/naming/retrace/VerticalClassMergingRetraceTest.java b/src/test/java/com/android/tools/r8/naming/retrace/VerticalClassMergingRetraceTest.java
index 6ef62be..a188b06 100644
--- a/src/test/java/com/android/tools/r8/naming/retrace/VerticalClassMergingRetraceTest.java
+++ b/src/test/java/com/android/tools/r8/naming/retrace/VerticalClassMergingRetraceTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.CompilationMode;
 import com.android.tools.r8.NeverInline;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.naming.retrace.StackTrace.StackTraceLine;
 import com.google.common.collect.ImmutableList;
 import java.util.Collection;
@@ -26,7 +27,7 @@
 
   @Parameters(name = "Backend: {0}, mode: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), CompilationMode.values());
+    return buildParameters(ToolHelper.getBackends(), CompilationMode.values());
   }
 
   public VerticalClassMergingRetraceTest(Backend backend, CompilationMode mode) {
diff --git a/src/test/java/com/android/tools/r8/neverreturnsnormally/NeverReturnsNormallyTest.java b/src/test/java/com/android/tools/r8/neverreturnsnormally/NeverReturnsNormallyTest.java
index 1b0c79c..3a5ffdd 100644
--- a/src/test/java/com/android/tools/r8/neverreturnsnormally/NeverReturnsNormallyTest.java
+++ b/src/test/java/com/android/tools/r8/neverreturnsnormally/NeverReturnsNormallyTest.java
@@ -38,7 +38,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public NeverReturnsNormallyTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/regress/B76025099.java b/src/test/java/com/android/tools/r8/regress/B76025099.java
index 383810b..337e824 100644
--- a/src/test/java/com/android/tools/r8/regress/B76025099.java
+++ b/src/test/java/com/android/tools/r8/regress/B76025099.java
@@ -43,7 +43,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public B76025099(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/regress/b63935662/Regress63935662.java b/src/test/java/com/android/tools/r8/regress/b63935662/Regress63935662.java
index 40af31f..bc53ac7 100644
--- a/src/test/java/com/android/tools/r8/regress/b63935662/Regress63935662.java
+++ b/src/test/java/com/android/tools/r8/regress/b63935662/Regress63935662.java
@@ -23,7 +23,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public Regress63935662(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/regress/b69825683/Regress69825683Test.java b/src/test/java/com/android/tools/r8/regress/b69825683/Regress69825683Test.java
index 8f4e2b3..47f0b1d 100644
--- a/src/test/java/com/android/tools/r8/regress/b69825683/Regress69825683Test.java
+++ b/src/test/java/com/android/tools/r8/regress/b69825683/Regress69825683Test.java
@@ -28,7 +28,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public Regress69825683Test(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/regress/b71604169/Regress71604169Test.java b/src/test/java/com/android/tools/r8/regress/b71604169/Regress71604169Test.java
index 5554548..dba1c0b 100644
--- a/src/test/java/com/android/tools/r8/regress/b71604169/Regress71604169Test.java
+++ b/src/test/java/com/android/tools/r8/regress/b71604169/Regress71604169Test.java
@@ -23,7 +23,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public Regress71604169Test(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/release/ShareCommonCodeOnDistinctPositionsTestRunner.java b/src/test/java/com/android/tools/r8/release/ShareCommonCodeOnDistinctPositionsTestRunner.java
index d70c724..5bc4e02 100644
--- a/src/test/java/com/android/tools/r8/release/ShareCommonCodeOnDistinctPositionsTestRunner.java
+++ b/src/test/java/com/android/tools/r8/release/ShareCommonCodeOnDistinctPositionsTestRunner.java
@@ -34,7 +34,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] parameters() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/resolution/B77944861.java b/src/test/java/com/android/tools/r8/resolution/B77944861.java
index b6aae78..3b74d05 100644
--- a/src/test/java/com/android/tools/r8/resolution/B77944861.java
+++ b/src/test/java/com/android/tools/r8/resolution/B77944861.java
@@ -40,7 +40,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public B77944861(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/resolution/PublicFieldInnerClassTest.java b/src/test/java/com/android/tools/r8/resolution/PublicFieldInnerClassTest.java
index 8d35333..5e93601 100644
--- a/src/test/java/com/android/tools/r8/resolution/PublicFieldInnerClassTest.java
+++ b/src/test/java/com/android/tools/r8/resolution/PublicFieldInnerClassTest.java
@@ -5,6 +5,7 @@
 
 import com.android.tools.r8.CompilationMode;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -72,7 +73,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Object[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public PublicFieldInnerClassTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/resolution/b123730538/B123730538.java b/src/test/java/com/android/tools/r8/resolution/b123730538/B123730538.java
index 462d514..b5f88cd 100644
--- a/src/test/java/com/android/tools/r8/resolution/b123730538/B123730538.java
+++ b/src/test/java/com/android/tools/r8/resolution/b123730538/B123730538.java
@@ -36,7 +36,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Object[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public B123730538(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/resource/DataResourceTest.java b/src/test/java/com/android/tools/r8/resource/DataResourceTest.java
index 81b8447..653059c 100644
--- a/src/test/java/com/android/tools/r8/resource/DataResourceTest.java
+++ b/src/test/java/com/android/tools/r8/resource/DataResourceTest.java
@@ -33,7 +33,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public DataResourceTest(TestBase.Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/resource/KeepDirectoriesTest.java b/src/test/java/com/android/tools/r8/resource/KeepDirectoriesTest.java
index 5b7a11e..4cbaf6c 100644
--- a/src/test/java/com/android/tools/r8/resource/KeepDirectoriesTest.java
+++ b/src/test/java/com/android/tools/r8/resource/KeepDirectoriesTest.java
@@ -51,7 +51,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}, Minify: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public KeepDirectoriesTest(Backend backend, boolean minify) {
diff --git a/src/test/java/com/android/tools/r8/rewrite/switches/SwitchRewritingJarTest.java b/src/test/java/com/android/tools/r8/rewrite/switches/SwitchRewritingJarTest.java
index 24789b0..7987f96 100644
--- a/src/test/java/com/android/tools/r8/rewrite/switches/SwitchRewritingJarTest.java
+++ b/src/test/java/com/android/tools/r8/rewrite/switches/SwitchRewritingJarTest.java
@@ -28,7 +28,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public SwitchRewritingJarTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/rewrite/switchmaps/RewriteSwitchMapsTest.java b/src/test/java/com/android/tools/r8/rewrite/switchmaps/RewriteSwitchMapsTest.java
index c0fbd53..afba8bd 100644
--- a/src/test/java/com/android/tools/r8/rewrite/switchmaps/RewriteSwitchMapsTest.java
+++ b/src/test/java/com/android/tools/r8/rewrite/switchmaps/RewriteSwitchMapsTest.java
@@ -25,7 +25,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public RewriteSwitchMapsTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/AtomicFieldUpdaterTest.java b/src/test/java/com/android/tools/r8/shaking/AtomicFieldUpdaterTest.java
index 8dcdd38..ae66a50 100644
--- a/src/test/java/com/android/tools/r8/shaking/AtomicFieldUpdaterTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/AtomicFieldUpdaterTest.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.StringConsumer.FileConsumer;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.AndroidApp;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -28,7 +29,7 @@
 
   @Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AtomicFieldUpdaterTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/EnclosingMethodTest.java b/src/test/java/com/android/tools/r8/shaking/EnclosingMethodTest.java
index c15ff24..6b4c8fd 100644
--- a/src/test/java/com/android/tools/r8/shaking/EnclosingMethodTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/EnclosingMethodTest.java
@@ -51,7 +51,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} minification: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public EnclosingMethodTest(Backend backend, boolean enableMinification) throws Exception {
diff --git a/src/test/java/com/android/tools/r8/shaking/FieldReadsJasminTest.java b/src/test/java/com/android/tools/r8/shaking/FieldReadsJasminTest.java
index 75dd2b1..20b2850 100644
--- a/src/test/java/com/android/tools/r8/shaking/FieldReadsJasminTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/FieldReadsJasminTest.java
@@ -11,6 +11,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.jasmin.JasminBuilder;
 import com.android.tools.r8.jasmin.JasminBuilder.ClassBuilder;
 import com.android.tools.r8.jasmin.JasminTestBase;
@@ -33,7 +34,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Object[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public FieldReadsJasminTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/InstantiatedLambdaReceiverTest.java b/src/test/java/com/android/tools/r8/shaking/InstantiatedLambdaReceiverTest.java
index 225ddd6..16d9503 100644
--- a/src/test/java/com/android/tools/r8/shaking/InstantiatedLambdaReceiverTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/InstantiatedLambdaReceiverTest.java
@@ -22,7 +22,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public InstantiatedLambdaReceiverTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/InvalidTypesTest.java b/src/test/java/com/android/tools/r8/shaking/InvalidTypesTest.java
index 6906b76..032bd05 100644
--- a/src/test/java/com/android/tools/r8/shaking/InvalidTypesTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/InvalidTypesTest.java
@@ -76,7 +76,7 @@
 
   @Parameters(name = "Backend: {0}, mode: {1}, use interface: {2}")
   public static Collection<Object[]> parameters() {
-    return buildParameters(Backend.values(), Mode.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), Mode.values(), BooleanUtils.values());
   }
 
   @Test
diff --git a/src/test/java/com/android/tools/r8/shaking/KeepAttributesTest.java b/src/test/java/com/android/tools/r8/shaking/KeepAttributesTest.java
index 08f1da2..8281015 100644
--- a/src/test/java/com/android/tools/r8/shaking/KeepAttributesTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/KeepAttributesTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.CompilationFailedException;
 import com.android.tools.r8.CompilationMode;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.shaking.forceproguardcompatibility.keepattributes.TestKeepAttributes;
 import com.android.tools.r8.utils.codeinspector.MethodSubject;
 import com.google.common.collect.ImmutableList;
@@ -28,7 +29,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] parameters() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   private final Backend backend;
diff --git a/src/test/java/com/android/tools/r8/shaking/LibraryProvidedProguardRulesTest.java b/src/test/java/com/android/tools/r8/shaking/LibraryProvidedProguardRulesTest.java
index 8738b74..2588070 100644
--- a/src/test/java/com/android/tools/r8/shaking/LibraryProvidedProguardRulesTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/LibraryProvidedProguardRulesTest.java
@@ -76,7 +76,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public LibraryProvidedProguardRulesTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/NonVirtualOverrideTest.java b/src/test/java/com/android/tools/r8/shaking/NonVirtualOverrideTest.java
index 4be2aaf..b813e6f 100644
--- a/src/test/java/com/android/tools/r8/shaking/NonVirtualOverrideTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/NonVirtualOverrideTest.java
@@ -46,7 +46,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}, class inlining: {1}, vertical class merging: {2}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values(), BooleanUtils.values());
   }
 
   public NonVirtualOverrideTest(
diff --git a/src/test/java/com/android/tools/r8/shaking/PrintUsageTest.java b/src/test/java/com/android/tools/r8/shaking/PrintUsageTest.java
index 1f6a0c0..8247e92 100644
--- a/src/test/java/com/android/tools/r8/shaking/PrintUsageTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/PrintUsageTest.java
@@ -94,7 +94,7 @@
     inspections.put("shaking12:keep-rules-printusage.txt", PrintUsageTest::inspectShaking12);
 
     List<Object[]> testCases = new ArrayList<>();
-    for (Backend backend : Backend.values()) {
+    for (Backend backend : ToolHelper.getBackends()) {
       Set<String> usedInspections = new HashSet<>();
       for (String test : tests) {
         File[] keepFiles = new File(ToolHelper.EXAMPLES_DIR + test)
diff --git a/src/test/java/com/android/tools/r8/shaking/ServiceLoaderTest.java b/src/test/java/com/android/tools/r8/shaking/ServiceLoaderTest.java
index ac4ac5f..1f2de23 100644
--- a/src/test/java/com/android/tools/r8/shaking/ServiceLoaderTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/ServiceLoaderTest.java
@@ -15,6 +15,7 @@
 import com.android.tools.r8.DataEntryResource;
 import com.android.tools.r8.R8TestRunResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.graph.AppServices;
 import com.android.tools.r8.naming.AdaptResourceFileContentsTest.DataResourceConsumerForTesting;
 import com.android.tools.r8.origin.Origin;
@@ -44,7 +45,7 @@
 
   @Parameters(name = "Backend: {0}, include WorldGreeter: {1}")
   public static List<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public ServiceLoaderTest(Backend backend, boolean includeWorldGreeter) {
diff --git a/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnFieldsTest.java b/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnFieldsTest.java
index cc0e5cf..9290085 100644
--- a/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnFieldsTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnFieldsTest.java
@@ -8,6 +8,7 @@
 
 import com.android.tools.r8.NeverClassInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.FieldSubject;
 import com.google.common.collect.ImmutableList;
@@ -25,7 +26,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AnnotationsOnFieldsTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnTargetedMethodTest.java b/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnTargetedMethodTest.java
index a7bdf0b..d727ce3 100644
--- a/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnTargetedMethodTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/annotations/AnnotationsOnTargetedMethodTest.java
@@ -35,7 +35,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public AnnotationsOnTargetedMethodTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/annotations/ReflectiveAnnotationUseTest.java b/src/test/java/com/android/tools/r8/shaking/annotations/ReflectiveAnnotationUseTest.java
index 7af0624..e08e8f7 100644
--- a/src/test/java/com/android/tools/r8/shaking/annotations/ReflectiveAnnotationUseTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/annotations/ReflectiveAnnotationUseTest.java
@@ -12,6 +12,7 @@
 import static org.junit.Assume.assumeTrue;
 
 import com.android.tools.r8.KotlinTestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.ToolHelper.KotlinTargetVersion;
 import com.android.tools.r8.graph.DexAnnotationElement;
 import com.android.tools.r8.utils.AndroidApp;
@@ -60,7 +61,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} target: {1} minify: {2}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), KotlinTargetVersion.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), KotlinTargetVersion.values(), BooleanUtils.values());
   }
 
   public ReflectiveAnnotationUseTest(
diff --git a/src/test/java/com/android/tools/r8/shaking/assumevalues/SynthesizedRulesFromApiLevelTest.java b/src/test/java/com/android/tools/r8/shaking/assumevalues/SynthesizedRulesFromApiLevelTest.java
index ffe6c21..610f63b 100644
--- a/src/test/java/com/android/tools/r8/shaking/assumevalues/SynthesizedRulesFromApiLevelTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/assumevalues/SynthesizedRulesFromApiLevelTest.java
@@ -48,7 +48,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   // Simple mock implementation of class android.os.Build$VERSION with just the SDK_INT field.
diff --git a/src/test/java/com/android/tools/r8/shaking/defaultmethods/DefaultMethodsTest.java b/src/test/java/com/android/tools/r8/shaking/defaultmethods/DefaultMethodsTest.java
index 424a5b7..b2e44c3 100644
--- a/src/test/java/com/android/tools/r8/shaking/defaultmethods/DefaultMethodsTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/defaultmethods/DefaultMethodsTest.java
@@ -32,7 +32,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public DefaultMethodsTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/ForceProguardCompatibilityTest.java b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/ForceProguardCompatibilityTest.java
index 906aee9..76fd865 100644
--- a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/ForceProguardCompatibilityTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/ForceProguardCompatibilityTest.java
@@ -53,7 +53,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ForceProguardCompatibilityTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
index 6e206e4..b17258b 100644
--- a/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/forceproguardcompatibility/defaultctor/ImplicitlyKeptDefaultConstructorTest.java
@@ -11,6 +11,7 @@
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.shaking.forceproguardcompatibility.ProguardCompatibilityTestBase;
 import com.android.tools.r8.smali.ConstantFoldingTest.TriConsumer;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -101,7 +102,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ImplicitlyKeptDefaultConstructorTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/accessrelaxation/IfRuleWithAccessRelaxationTest.java b/src/test/java/com/android/tools/r8/shaking/ifrule/accessrelaxation/IfRuleWithAccessRelaxationTest.java
index 560ebd4..9e49df9 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/accessrelaxation/IfRuleWithAccessRelaxationTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/accessrelaxation/IfRuleWithAccessRelaxationTest.java
@@ -13,6 +13,7 @@
 
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -30,7 +31,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   @Test
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/classinlining/IfRuleWithClassInlining.java b/src/test/java/com/android/tools/r8/shaking/ifrule/classinlining/IfRuleWithClassInlining.java
index caa06d3..cb06b0e 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/classinlining/IfRuleWithClassInlining.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/classinlining/IfRuleWithClassInlining.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertThat;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -34,7 +35,7 @@
 
   @Parameters(name = "Backend: {0}, class inlining: {1}, with if rule: {2}")
   public static List<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values(), BooleanUtils.values());
   }
 
   @Test
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/classstaticizer/IfRuleWithClassStaticizerTest.java b/src/test/java/com/android/tools/r8/shaking/ifrule/classstaticizer/IfRuleWithClassStaticizerTest.java
index a12620d..f5b1a29 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/classstaticizer/IfRuleWithClassStaticizerTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/classstaticizer/IfRuleWithClassStaticizerTest.java
@@ -12,6 +12,7 @@
 import com.android.tools.r8.NeverClassInline;
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -30,7 +31,7 @@
 
   @Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public IfRuleWithClassStaticizerTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/IfRuleWithVerticalClassMerging.java b/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/IfRuleWithVerticalClassMerging.java
index 2d9027d..9c2b567 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/IfRuleWithVerticalClassMerging.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/IfRuleWithVerticalClassMerging.java
@@ -10,6 +10,7 @@
 
 import com.android.tools.r8.NeverClassInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.InternalOptions;
 import com.android.tools.r8.utils.StringUtils;
@@ -78,7 +79,7 @@
   @Parameters(name = "Backend: {0}, vertical class merging: {1}")
   public static Collection<Object[]> data() {
     // We don't run this on Proguard, as Proguard does not merge A into B.
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   private void configure(InternalOptions options) {
diff --git a/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/MergedTypeBaseTest.java b/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/MergedTypeBaseTest.java
index 4fa2440..d10f029 100644
--- a/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/MergedTypeBaseTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/ifrule/verticalclassmerging/MergedTypeBaseTest.java
@@ -10,6 +10,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.BooleanUtils;
 import com.android.tools.r8.utils.InternalOptions;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -60,7 +61,7 @@
   @Parameters(name = "Backend: {0}, vertical class merging: {1}")
   public static Collection<Object[]> data() {
     // We don't run this on Proguard, as Proguard does not merge A into B.
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public abstract Class<?> getTestClass();
diff --git a/src/test/java/com/android/tools/r8/shaking/keepclassmembers/KeepClassMembersTest.java b/src/test/java/com/android/tools/r8/shaking/keepclassmembers/KeepClassMembersTest.java
index 5537869..a0b9fb3 100644
--- a/src/test/java/com/android/tools/r8/shaking/keepclassmembers/KeepClassMembersTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/keepclassmembers/KeepClassMembersTest.java
@@ -11,6 +11,7 @@
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.shaking.forceproguardcompatibility.ProguardCompatibilityTestBase;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
@@ -28,7 +29,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeepClassMembersTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedClassTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedClassTestRunner.java
index c758507..47659e2 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedClassTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedClassTestRunner.java
@@ -7,6 +7,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.utils.StringUtils;
@@ -27,7 +28,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptByAnnotatedClassTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedMethodTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedMethodTestRunner.java
index a7e3e46..dddc278 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedMethodTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByAnnotatedMethodTestRunner.java
@@ -7,6 +7,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.references.Reference;
@@ -33,7 +34,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptByAnnotatedMethodTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByFieldReflectionTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByFieldReflectionTestRunner.java
index 6ba1f08..a2d5ba7 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByFieldReflectionTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByFieldReflectionTestRunner.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.FieldReference;
 import com.android.tools.r8.references.MethodReference;
@@ -44,7 +45,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptByFieldReflectionTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByMethodReflectionTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByMethodReflectionTestRunner.java
index 3224689..4f226fe 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByMethodReflectionTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByMethodReflectionTestRunner.java
@@ -7,6 +7,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.shaking.WhyAreYouKeepingConsumer;
@@ -42,7 +43,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptByMethodReflectionTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByTwoRulesTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByTwoRulesTestRunner.java
index 38c3f00..975361e 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByTwoRulesTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptByTwoRulesTestRunner.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.utils.StringUtils;
 import com.android.tools.r8.utils.graphinspector.GraphInspector;
@@ -31,7 +32,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptByTwoRulesTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptMethodTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptMethodTestRunner.java
index 04d5706..81ba033 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptMethodTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptMethodTestRunner.java
@@ -7,6 +7,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.utils.StringUtils;
@@ -27,7 +28,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptMethodTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptViaClassInitializerTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptViaClassInitializerTestRunner.java
index 50ee3e2..0e61231 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptViaClassInitializerTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/KeptViaClassInitializerTestRunner.java
@@ -73,7 +73,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public KeptViaClassInitializerTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/keptgraph/RemovedClassTestRunner.java b/src/test/java/com/android/tools/r8/shaking/keptgraph/RemovedClassTestRunner.java
index c555b7e..37ba854 100644
--- a/src/test/java/com/android/tools/r8/shaking/keptgraph/RemovedClassTestRunner.java
+++ b/src/test/java/com/android/tools/r8/shaking/keptgraph/RemovedClassTestRunner.java
@@ -9,6 +9,7 @@
 
 import com.android.tools.r8.R8TestCompileResult;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.MethodReference;
 import com.android.tools.r8.utils.StringUtils;
@@ -37,7 +38,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public RemovedClassTestRunner(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/proxy/MockitoTest.java b/src/test/java/com/android/tools/r8/shaking/proxy/MockitoTest.java
index bb6f828..1d6b5b0 100644
--- a/src/test/java/com/android/tools/r8/shaking/proxy/MockitoTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/proxy/MockitoTest.java
@@ -35,7 +35,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0} minify: {1}")
   public static Collection<Object[]> data() {
-    return buildParameters(Backend.values(), BooleanUtils.values());
+    return buildParameters(ToolHelper.getBackends(), BooleanUtils.values());
   }
 
   public MockitoTest(Backend backend, boolean minify) {
diff --git a/src/test/java/com/android/tools/r8/shaking/proxy/ProxiesTest.java b/src/test/java/com/android/tools/r8/shaking/proxy/ProxiesTest.java
index 8896d25..0fe8d7e 100644
--- a/src/test/java/com/android/tools/r8/shaking/proxy/ProxiesTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/proxy/ProxiesTest.java
@@ -40,7 +40,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ProxiesTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/reflection/FieldAccessTest.java b/src/test/java/com/android/tools/r8/shaking/reflection/FieldAccessTest.java
index 7aa573e..dd8dd90 100644
--- a/src/test/java/com/android/tools/r8/shaking/reflection/FieldAccessTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/reflection/FieldAccessTest.java
@@ -8,6 +8,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.references.FieldReference;
 import com.android.tools.r8.references.MethodReference;
@@ -26,7 +27,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public FieldAccessTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/synthetic/StaticCallInSyntheticMethodAsmTest.java b/src/test/java/com/android/tools/r8/shaking/synthetic/StaticCallInSyntheticMethodAsmTest.java
index b08be31..d0968c5 100644
--- a/src/test/java/com/android/tools/r8/shaking/synthetic/StaticCallInSyntheticMethodAsmTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/synthetic/StaticCallInSyntheticMethodAsmTest.java
@@ -4,6 +4,7 @@
 package com.android.tools.r8.shaking.synthetic;
 
 import com.android.tools.r8.AsmTestBase;
+import com.android.tools.r8.ToolHelper;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -14,7 +15,7 @@
 
   @Parameterized.Parameters(name = "backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public StaticCallInSyntheticMethodAsmTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/testrules/ForceInlineTest.java b/src/test/java/com/android/tools/r8/shaking/testrules/ForceInlineTest.java
index 4bfdd16..3c23ef6 100644
--- a/src/test/java/com/android/tools/r8/shaking/testrules/ForceInlineTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/testrules/ForceInlineTest.java
@@ -14,6 +14,7 @@
 import static org.junit.Assert.fail;
 
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.google.common.collect.ImmutableList;
@@ -28,7 +29,7 @@
 
   @Parameterized.Parameters(name = "Backend: {0}")
   public static Backend[] data() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public ForceInlineTest(Backend backend) {
diff --git a/src/test/java/com/android/tools/r8/shaking/whyareyoukeeping/WhyAreYouKeepingTest.java b/src/test/java/com/android/tools/r8/shaking/whyareyoukeeping/WhyAreYouKeepingTest.java
index 2a5a6f6..87f73bd 100644
--- a/src/test/java/com/android/tools/r8/shaking/whyareyoukeeping/WhyAreYouKeepingTest.java
+++ b/src/test/java/com/android/tools/r8/shaking/whyareyoukeeping/WhyAreYouKeepingTest.java
@@ -10,6 +10,7 @@
 import com.android.tools.r8.CompilationFailedException;
 import com.android.tools.r8.NeverInline;
 import com.android.tools.r8.TestBase;
+import com.android.tools.r8.ToolHelper;
 import com.android.tools.r8.references.Reference;
 import com.android.tools.r8.shaking.WhyAreYouKeepingConsumer;
 import com.android.tools.r8.utils.StringUtils;
@@ -58,7 +59,7 @@
 
   @Parameters(name = "{0}")
   public static Backend[] parameters() {
-    return Backend.values();
+    return ToolHelper.getBackends();
   }
 
   public final Backend backend;