diff --git a/python_modules/dagster/tox.ini b/python_modules/dagster/tox.ini
index 881f50bf2cdef..f12869179d583 100644
--- a/python_modules/dagster/tox.ini
+++ b/python_modules/dagster/tox.ini
@@ -16,7 +16,7 @@ deps =
   general_tests_old_protobuf: protobuf<4
   -e ../dagster-test
   -e .[mypy,test,pyright]
-  ; -e ../dagster-ext
+  -e ../dagster-ext
 allowlist_externals =
   /bin/bash
 commands =