--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.api.directives.test/src/org/graalvm/compiler/api/directives/test/OpaqueDirectiveTest.java	Thu Jun 27 03:10:52 2019 +0200
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.api.directives.test/src/org/graalvm/compiler/api/directives/test/OpaqueDirectiveTest.java	Thu Jun 27 03:33:44 2019 +0200
@@ -138,11 +138,10 @@
     }
 
     @Override
-    protected boolean checkLowTierGraph(StructuredGraph graph) {
+    protected void checkLowTierGraph(StructuredGraph graph) {
         OpaqueSnippet snippet = graph.method().getAnnotation(OpaqueSnippet.class);
         for (ReturnNode returnNode : graph.getNodes(ReturnNode.TYPE)) {
             Assert.assertEquals(snippet.expectedReturnNode(), returnNode.result().getClass());
         }
-        return true;
     }
 }