diff --git a/test-requirements.txt b/test-requirements.txt
index 343b11e..66960ea 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,6 +4,7 @@
 
 hacking>=0.9.1,<0.10
 oslotest>=1.1.0  # Apache-2.0
+coverage>=3.6
 
 # These are needed for docs generation
 oslosphinx>=2.2.0  # Apache-2.0