diff --git a/doc/source/contributor/running-tests.rst b/doc/source/contributor/running-tests.rst
index 2a300bb16c..269b7da547 100644
--- a/doc/source/contributor/running-tests.rst
+++ b/doc/source/contributor/running-tests.rst
@@ -118,7 +118,7 @@ a breaking point to the code:
 
   import pdb; pdb.set_trace()
 
-..end
+.. end
 
 Then run :command:`tox` with the debug environment as one of the following: