diff --git a/tox.ini b/tox.ini
index da3b58ae..e5cac2eb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ deps =
     sphinx < 2.0
     cov: coverage
 # Overwrite the parso version (only used sometimes).
-#     git+https://github.com/davidhalter/parso.git
+    git+https://github.com/davidhalter/parso.git
 passenv = JEDI_TEST_ENVIRONMENT
 setenv =
 # https://github.com/tomchristie/django-rest-framework/issues/1957