diff --git a/Tests/base/NSKVOSupport/proxy.m b/Tests/base/NSKVOSupport/proxy.m
index 5db41b6ce..3aa1a3b82 100644
--- a/Tests/base/NSKVOSupport/proxy.m
+++ b/Tests/base/NSKVOSupport/proxy.m
@@ -197,16 +197,16 @@ - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(N
     count += 1;
     switch (count) {
         case 1:
-            PASS_EQUAL(keyPath, keys[0], "change notification for dependent key 'derivedName' is emitted first");
+            PASS_EQUAL(keyPath, [keys objectAtIndex: 0], "change notification for dependent key 'derivedName' is emitted first");
             break;
         case 2:
-            PASS_EQUAL(keyPath, keys[1], "'name' change notification for proxy is second");
+            PASS_EQUAL(keyPath, [keys objectAtIndex: 1], "'name' change notification for proxy is second");
             break;
         case 3:
-            PASS_EQUAL(keyPath, keys[0], "'derivedName' change notification for object is third");
+            PASS_EQUAL(keyPath, [keys objectAtIndex: 0], "'derivedName' change notification for object is third");
             break;
         case 4:
-            PASS_EQUAL(keyPath, keys[1], "'name' change notification for object is fourth");
+            PASS_EQUAL(keyPath, [keys objectAtIndex: 1], "'name' change notification for object is fourth");
             break;
         default:
             PASS(0, "unexpected -[Observer observeValueForKeyPath:ofObject:change:context:] callback");