diff --git a/autobahn/twisted/test/test_application_runner.py b/autobahn/twisted/test/test_application_runner.py
index 42f8c17c..a0bdf99b 100644
--- a/autobahn/twisted/test/test_application_runner.py
+++ b/autobahn/twisted/test/test_application_runner.py
@@ -52,8 +52,8 @@ if os.environ.get('USE_TWISTED', False):
             self.assertRaises(RuntimeError, runner.run, raise_error)
 
             # both reactor.run and reactor.stop should have been called
-            fakereactor.run.assert_called()
-            fakereactor.stop.assert_called()
+            self.assertEqual(fakereactor.run.call_count, 1)
+            self.assertEqual(fakereactor.stop.call_count, 1)
 
         @patch('twisted.internet.reactor')
         @inlineCallbacks
@@ -71,8 +71,8 @@ if os.environ.get('USE_TWISTED', False):
 
             # neither reactor.run() NOR reactor.stop() should have been called
             # (just connectTCP() will have been called)
-            fakereactor.run.assert_not_called()
-            fakereactor.stop.assert_not_called()
+            self.assertEqual(fakereactor.run.call_count, 0)
+            self.assertEqual(fakereactor.stop.call_count, 0)
 
         @patch('twisted.internet.reactor')
         def test_runner_no_run_happypath(self, fakereactor):
@@ -90,8 +90,8 @@ if os.environ.get('USE_TWISTED', False):
 
             # neither reactor.run() NOR reactor.stop() should have been called
             # (just connectTCP() will have been called)
-            fakereactor.run.assert_not_called()
-            fakereactor.stop.assert_not_called()
+            self.assertEqual(fakereactor.run.call_count, 0)
+            self.assertEqual(fakereactor.stop.call_count, 0)
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/tox.ini b/tox.ini
index 56447d90..ec5b2181 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,9 @@
 [tox]
-envlist = flake8, {pypy,py27,py33}-{twtrunk,trollius}, {py34}-{twtrunk,asyncio}, {pypy,py26,py27}-{tw122,tw132,twcurrent},
+envlist =
+    flake8
+    {pypy,py27,py33}-{twtrunk,trollius}
+    {py34}-{twtrunk,asyncio}
+    {pypy,py26,py27}-{tw122,tw132,twcurrent}
 
 [testenv]
 deps =