--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.api.directives.test/src/org/graalvm/compiler/api/directives/test/IterationDirectiveTest.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/IterationDirectiveTest.java	Thu Jun 27 03:33:44 2019 +0200
@@ -54,13 +54,11 @@
     }
 
     @Override
-    protected boolean checkLowTierGraph(StructuredGraph graph) {
+    protected void checkLowTierGraph(StructuredGraph graph) {
         NodeIterable<LoopBeginNode> loopBeginNodes = graph.getNodes(LoopBeginNode.TYPE);
         Assert.assertEquals("LoopBeginNode count", 1, loopBeginNodes.count());
 
         LoopBeginNode loopBeginNode = loopBeginNodes.first();
         Assert.assertEquals("loop frequency of " + loopBeginNode, 128, loopBeginNode.loopFrequency(), 0);
-
-        return true;
     }
 }