diff --git a/images/Pipfile b/images/Pipfile
index 072321abce2..241d8846cda 100644
--- a/images/Pipfile
+++ b/images/Pipfile
@@ -37,6 +37,7 @@ protobuf = "==3.5.1"
 pylint = "==1.8.2"
 python-dateutil = "==2.6.1"
 pytz = "==2017.3"
+pytest = "==4.1.1"
 pyyaml = "*"
 requests = "==2.18.4"
 requests-oauthlib = "==0.8.0"