diff --git a/test-requirements.txt b/test-requirements.txt
index 6fb37cbe0..21c448876 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -16,4 +16,4 @@ tempest>=12.1.0 # Apache-2.0
 testtools>=1.4.0 # MIT
 testrepository>=0.0.18 # Apache-2.0/BSD
 os-testr>=0.8.0 # Apache-2.0
-oslo.serialization>=1.10.0              # Apache-2.0
+oslo.serialization>=1.10.0 # Apache-2.0