Fix red tests

Change-Id: I75c7bf09e2f755eb38a45bf81daf9083eb802864
diff --git a/src/test/java/com/android/tools/r8/shaking/examples/TreeShaking8Test.java b/src/test/java/com/android/tools/r8/shaking/examples/TreeShaking8Test.java
index 5b1009e..4f31790 100644
--- a/src/test/java/com/android/tools/r8/shaking/examples/TreeShaking8Test.java
+++ b/src/test/java/com/android/tools/r8/shaking/examples/TreeShaking8Test.java
@@ -54,7 +54,9 @@
     Assert.assertTrue(clazz.isAbstract());
     clazz.forAllMethods((method) -> Assert.fail());
     clazz = inspector.clazz("shaking8.YetAnotherThing");
-    Assert.assertTrue(clazz.isAbstract());
-    clazz.forAllMethods((method) -> Assert.fail());
+    if (clazz.isPresent()) {
+      Assert.assertTrue(clazz.isAbstract());
+      clazz.forAllMethods((method) -> Assert.fail());
+    }
   }
 }