diff --git a/requirements-test.txt b/requirements-test.txt
index 9150d9ee..e9e67b3e 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -3,6 +3,6 @@ vcrpy==1.10.3
 # FIXME remove the constraint after resolving
 # https://github.com/pytest-dev/pytest/issues/2966
 pytest<3.3.0
-pytest-cov
+pytest-cov<2.6.0
 pytest-catchlog
 responses==0.5.0