diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -115,6 +115,7 @@ setup(
             'pytest-sugar',
             'requests-mock',
             'tox',
+            'virtualenv',
         ],
     },
added virtualenv test dependency required to get tox working on debian