diff --git a/.github/workflows/test_windows_main.yml b/.github/workflows/test_windows_main.yml
index 95e67c46..7f117b02 100644
--- a/.github/workflows/test_windows_main.yml
+++ b/.github/workflows/test_windows_main.yml
@@ -22,4 +22,4 @@ jobs:
         shell: cmd
         run: |
           cd idaes-pse\idaes
-          pytest -m "not integration" --ignore dmf --ignore commands
+          pytest -m "not integration" --ignore=dmf --ignore=commands