is failing -> fails

docs/index.rst

@@ -243,7 +243,7 @@ Run your tests on jenkins or travis.ci for continious integration
 
 Assuming you've created unit, functional and/or doc tests for a Plone package (which you should do), the next step
 is to run those test using continuous integration (CI). This means that the tests are run at a certain interval. If a test
-is failing a notification is sent out by email.
+fails, a notification is sent out by email.
 
 If you haven't created tests for your package you can read the `'Testing and debugging' document on readthedocs <http://collective-docs.readthedocs.org/en/latest/testing_and_debugging/index.html>`_.