diff --git a/test-requirements.txt b/test-requirements.txt
index 3f3af99..d897a57 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,6 +1,7 @@
 black ; python_version > '3.5'
 flake8
 mock
 pexpect
 pytest-xdist
 yamllint
+coverage==4.5.4