diff --git a/test-requirements.txt b/test-requirements.txt
index e4ce3fdb15..c393b3ae07 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,7 +14,7 @@ openstackdocstheme>=1.5.0 # Apache-2.0
 doc8 # Apache-2.0
 requests>=2.10.0,!=2.12.2  # Apache-2.0
 requestsexceptions>=1.1.1 # Apache-2.0
-sphinxmark
+sphinxmark # Apache-2.0
 lxml>=2.3,!=3.7.0  # BSD
 
 # For translations