diff --git a/docs/content/tutorial/step_09.ngdoc b/docs/content/tutorial/step_09.ngdoc
index 245a51d53226..d4b042337c87 100644
--- a/docs/content/tutorial/step_09.ngdoc
+++ b/docs/content/tutorial/step_09.ngdoc
@@ -107,7 +107,7 @@ describe('filter', function() {
 </pre>
 
 Note that you need to configure our test injector with the `phonecatFilters` module before any of
-our filter tests execute.
+our filter tests execute. Please note also the naming convention to inject the filter.
 
 You should now see the following output in the Karma tab: