diff --git a/pipenv/utils.py b/pipenv/utils.py
index f90431a1..0ba41eb5 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -29,7 +29,7 @@ def python_version(path_to_python):
     try:
         TEMPLATE = 'Python {}.{}.{}'
         c = delegator.run([path_to_python,'--version'], block=False)
-        c.return_code == 0
+        assert c.return_code == 0
     except Exception:
         return None