diff --git a/test-requirements.txt b/test-requirements.txt
index 6189b19..8e48ac2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,3 +9,4 @@ oslosphinx>=2.2.0  # Apache-2.0
 oslotest>=1.1.0  # Apache-2.0
 sphinx>=1.1.2,!=1.2.0,<1.3
 testtools>=0.9.34
+coverage>=3.6