--- old/test/jdk/tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java	2019-04-18 22:08:29.552305863 -0400
+++ new/test/jdk/tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java	2019-04-18 22:08:28.648305879 -0400
@@ -193,6 +193,15 @@
             int version = (int) getVersion.invoke(clazz.getConstructor().newInstance());
             Assert.assertEquals(version, JarFile.runtimeVersion().major());
         }
+        // Very rarely this test fails on Windows due to:
+        //     Error. failed to clean up files after test
+        // and this mesg shows the problem file (variable jimage):
+        //     Can't delete T:\\testOutput\\test-support\\jtreg_open_test_jdk_core_tools\\scratch\\0\\myimage\\lib\\modules
+        // The failure happens more with async monitor deflation
+        // so I think that an inflated monitor is keeping the above
+        // try-with-resources block from cleaning up in a timely
+        // fashion. Forcing a GC here appears to solve the problem.
+        System.gc();
     }
 
     @Test