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 eab5197..d753632 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
@@ -7,6 +7,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import com.android.tools.r8.ClassFileConsumer;
 import com.android.tools.r8.DexIndexedConsumer;
 import com.android.tools.r8.R8Command;
 import com.android.tools.r8.TestBase;
@@ -19,18 +20,43 @@
 import com.android.tools.r8.utils.codeinspector.CodeInspector;
 import com.android.tools.r8.utils.codeinspector.MethodSubject;
 import com.google.common.collect.ImmutableList;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
 
+@RunWith(Parameterized.class)
 public class DefaultMethodsTest extends TestBase {
+
+  private Backend backend;
+
+  @Parameterized.Parameters(name = "Backend: {0}")
+  public static Collection<Backend> data() {
+    return Arrays.asList(Backend.values());
+  }
+
+  public DefaultMethodsTest(Backend backend) {
+    this.backend = backend;
+  }
+
   private void runTest(List<String> additionalKeepRules, Consumer<CodeInspector> inspection)
       throws Exception {
     R8Command.Builder builder = R8Command.builder();
     builder.addProgramFiles(ToolHelper.getClassFileForTestClass(InterfaceWithDefaultMethods.class));
     builder.addProgramFiles(ToolHelper.getClassFileForTestClass(ClassImplementingInterface.class));
     builder.addProgramFiles(ToolHelper.getClassFileForTestClass(TestClass.class));
-    builder.setProgramConsumer(DexIndexedConsumer.emptyConsumer());
-    builder.setMinApiLevel(AndroidApiLevel.O.getLevel());
+    if (backend == Backend.DEX) {
+      builder.setProgramConsumer(DexIndexedConsumer.emptyConsumer());
+      int apiLevel = AndroidApiLevel.O.getLevel();
+      builder.setMinApiLevel(apiLevel);
+      builder.addLibraryFiles(ToolHelper.getAndroidJar(apiLevel));
+    } else {
+      assert backend == Backend.CF;
+      builder.setProgramConsumer(ClassFileConsumer.emptyConsumer());
+      builder.addLibraryFiles(ToolHelper.getJava8RuntimeJar());
+    }
     // Always keep main in the test class, so the output never becomes empty.
     builder.addProguardConfiguration(ImmutableList.of(
         "-keep class " + TestClass.class.getCanonicalName() + "{",