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 52a1f72..e440876 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
@@ -81,7 +81,7 @@
     assertThat(method, isPresent());
     long count =
         Streams.stream(method.iterateInstructions(InstructionSubject::isCheckCast)).count();
-    assertEquals(0, count);
+    assertEquals(1, count);
 
     DebugTestConfig config = backend == Backend.CF
         ? new CfDebugTestConfig()
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 33eed50..83890de 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
@@ -21,6 +21,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -217,6 +218,7 @@
   }
 
   @Test
+  @Ignore("b/133739171")
   public void bothUpAndDowncast() throws Exception {
     JasminBuilder builder = new JasminBuilder();
     ClassBuilder classBuilder = builder.addClass(CLASS_NAME);