--- old/test/hotspot/gtest/oops/test_markOop.cpp	2019-10-17 17:29:31.000000000 -0400
+++ new/test/hotspot/gtest/oops/test_markOop.cpp	2019-10-17 17:29:31.000000000 -0400
@@ -118,6 +118,10 @@
   // This is no longer biased, because ObjectLocker revokes the bias.
   assert_test_pattern(h_obj, "is_neutral no_hash");
 
+  // Hash the object then print it.
+  intx hash = h_obj->identity_hash();
+  assert_test_pattern(h_obj, "is_neutral hash=0x");
+
   // Wait gets the lock inflated.
   {
     ObjectLocker ol(h_obj, THREAD);
@@ -132,14 +136,18 @@
     done.wait_with_safepoint_check(THREAD);  // wait till the thread is done.
   }
 
-  // Make the object older. Not all GCs use this field.
-  Universe::heap()->collect(GCCause::_java_lang_system_gc);
-  if (UseParallelGC) {
-    assert_test_pattern(h_obj, "is_neutral no_hash age 1");
-  }
+  if (!AsyncDeflateIdleMonitors) {
+    // With AsyncDeflateIdleMonitors, the collect() call below
+    // does not guarantee monitor deflation.
+    // Make the object older. Not all GCs use this field.
+    Universe::heap()->collect(GCCause::_java_lang_system_gc);
+    if (UseParallelGC) {
+      assert_test_pattern(h_obj, "is_neutral no_hash age 1");
+    }
 
-  // Hash the object then print it.
-  intx hash = h_obj->identity_hash();
-  assert_test_pattern(h_obj, "is_neutral hash=0x");
+    // Hash the object then print it.
+    intx hash = h_obj->identity_hash();
+    assert_test_pattern(h_obj, "is_neutral hash=0x");
+  }
 }
 #endif // PRODUCT