diff --git a/rhodecode/tests/scripts/test_concurency.py b/rhodecode/tests/scripts/test_concurency.py
--- a/rhodecode/tests/scripts/test_concurency.py
+++ b/rhodecode/tests/scripts/test_concurency.py
@@ -161,7 +161,7 @@ def test_clone_with_credentials(no_error
                                 seq=None, backend='hg'):
     cwd = path = jn(TESTS_TMP_PATH, repo)
 
-    if seq == None:
+    if seq is None:
         seq = _RandomNameSequence().next()
 
     try:
@@ -217,5 +217,4 @@ if __name__ == '__main__':
                                         seq=seq, backend=backend)
         print 'time taken %.3f' % (time.time() - s)
     except Exception, e:
-        raise
         sys.exit('stop on %s' % e)