Index: /trunk/src/VBox/Runtime/testcase/tstRTLockValidator.cpp
===================================================================
--- /trunk/src/VBox/Runtime/testcase/tstRTLockValidator.cpp	(revision 25620)
+++ /trunk/src/VBox/Runtime/testcase/tstRTLockValidator.cpp	(revision 25621)
@@ -230,4 +230,6 @@
 
     RTTEST_CHECK_RC_RET(g_hTest, RTCritSectEnter(pMine), VINF_SUCCESS, rcCheck);
+    if (i & 1)
+        RTTEST_CHECK_RC(g_hTest, RTCritSectEnter(pMine), VINF_SUCCESS);
     if (testWaitForCritSectToBeOwned(pNext))
     {
@@ -244,6 +246,8 @@
         if (RT_SUCCESS(rc))
             RTTEST_CHECK_RC(g_hTest, rc = RTCritSectLeave(pNext), VINF_SUCCESS);
+    }
+    if (i & 1)
         RTTEST_CHECK_RC(g_hTest, RTCritSectLeave(pMine), VINF_SUCCESS);
-    }
+    RTTEST_CHECK_RC(g_hTest, RTCritSectLeave(pMine), VINF_SUCCESS);
     return VINF_SUCCESS;
 }
@@ -258,5 +262,9 @@
 
     if (i & 1)
+    {
         RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hMine, RT_INDEFINITE_WAIT), VINF_SUCCESS, rcCheck);
+        if ((i & 3) == 3)
+            RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hMine, RT_INDEFINITE_WAIT), VINF_SUCCESS);
+    }
     else
         RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hMine, RT_INDEFINITE_WAIT), VINF_SUCCESS, rcCheck);
@@ -281,5 +289,9 @@
     }
     if (i & 1)
+    {
+        if ((i & 3) == 3)
+            RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hMine), VINF_SUCCESS);
         RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hMine), VINF_SUCCESS);
+    }
     else
         RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hMine), VINF_SUCCESS);