diff --git a/tests/debian-jessie.Dockerfile b/tests/debian-jessie.Dockerfile
index 03252b3..e9099cd 100644
--- a/tests/debian-jessie.Dockerfile
+++ b/tests/debian-jessie.Dockerfile
@@ -1,4 +1,5 @@
 FROM williamyeh/ansible:debian8-onbuild
 
 RUN apt-get update
+RUN apt-get install -y python-netaddr
 CMD ["sh", "tests/travis.sh"]