diff --git a/python/helpers/pycharm_generator_utils/test/tox.ini b/python/helpers/pycharm_generator_utils/test/tox.ini
index 8d559126b03d..76574ae5f353 100644
--- a/python/helpers/pycharm_generator_utils/test/tox.ini
+++ b/python/helpers/pycharm_generator_utils/test/tox.ini
@@ -1,9 +1,8 @@
 [tox]
 skipsdist=True
-envlist = py27,py36
+envlist = py27,py35,py36,py37
 
 [testenv]
-deps = Cython
 setenv =
     PYTHONPATH = {toxinidir}/../..{:}
 commands =