--- a/utils/run-tests.cc	Thu Apr 19 22:29:09 2007 +0200
+++ b/utils/run-tests.cc	Tue May 01 17:55:04 2007 -0700
@@ -25,7 +25,9 @@
 {
 #ifdef RUN_SELF_TESTS
   ns3::TestManager::EnableVerbose ();
-  ns3::TestManager::RunTests ();
+  bool success = ns3::TestManager::RunTests ();
+  if (!success)
+    return 1;
 #endif /* RUN_SELF_TESTS */
 
   return 0;