Dont merge classes for single target after inlining test

Change-Id: Ib8ef48a2c3414afdf8b374a2ae469397b5e53f41
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/inliner/SingleTargetAfterInliningTest.java b/src/test/java/com/android/tools/r8/ir/optimize/inliner/SingleTargetAfterInliningTest.java
index 9ebb411..2012c6f 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/inliner/SingleTargetAfterInliningTest.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/inliner/SingleTargetAfterInliningTest.java
@@ -11,6 +11,7 @@
 import com.android.tools.r8.AlwaysInline;
 import com.android.tools.r8.AssumeMayHaveSideEffects;
 import com.android.tools.r8.NeverClassInline;
+import com.android.tools.r8.NoHorizontalClassMerging;
 import com.android.tools.r8.TestBase;
 import com.android.tools.r8.TestParameters;
 import com.android.tools.r8.utils.codeinspector.ClassSubject;
@@ -51,6 +52,7 @@
             })
         .enableAlwaysInliningAnnotations()
         .enableNeverClassInliningAnnotations()
+        .enableNoHorizontalClassMergingAnnotations()
         .enableSideEffectAnnotations()
         .setMinApi(parameters.getApiLevel())
         .compile()
@@ -117,6 +119,7 @@
   }
 
   @NeverClassInline
+  @NoHorizontalClassMerging
   static class C extends A {
 
     @AssumeMayHaveSideEffects // To ensure that new C() cannot be removed.