--- jsr166/src/test/tck/TreeSubSetTest.java	2011/03/15 19:47:07	1.18
+++ jsr166/src/test/tck/TreeSubSetTest.java	2011/05/27 19:10:32	1.19
@@ -476,7 +476,7 @@ public class TreeSubSetTest extends JSR1
         NavigableSet q = populatedSet(SIZE);
         String s = q.toString();
         for (int i = 0; i < SIZE; ++i) {
-            assertTrue(s.indexOf(String.valueOf(i)) >= 0);
+            assertTrue(s.contains(String.valueOf(i)));
         }
     }
 
@@ -969,7 +969,7 @@ public class TreeSubSetTest extends JSR1
         NavigableSet q = populatedSet(SIZE);
         String s = q.toString();
         for (int i = 0; i < SIZE; ++i) {
-            assertTrue(s.indexOf(String.valueOf(i)) >= 0);
+            assertTrue(s.contains(String.valueOf(i)));
         }
     }