--- a/test/jdk/java/util/concurrent/tck/ConcurrentLinkedDequeTest.java	Thu Jun 21 11:10:44 2018 -0400
+++ b/test/jdk/java/util/concurrent/tck/ConcurrentLinkedDequeTest.java	Thu Jun 21 08:25:03 2018 -0700
@@ -712,7 +712,7 @@
     public void testToArray_NullArg() {
         ConcurrentLinkedDeque q = populatedDeque(SIZE);
         try {
-            q.toArray(null);
+            q.toArray((Object[])null);
             shouldThrow();
         } catch (NullPointerException success) {}
     }