diff --git a/test-requirements.txt b/test-requirements.txt
index 123bda5..4f1e3a3 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 Pillow>=2.4.0 # PIL License
 sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 mock>=2.0 # BSD
-coverage>=3.6 # Apache-2.0
+coverage>=4.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 oslotest>=1.10.0 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0