diff --git a/python/tox.ini b/python/tox.ini
index 92e7b105ae..357e4c1ff2 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -8,6 +8,7 @@ setenv =
     LD_LIBRARY_PATH={toxinidir}/../src/.libs
 commands =
     python setup.py -q --cpp_implementation develop
+    python setup.py build_py
     python setup.py -q test -q
 deps =
     six