diff --git a/.github/workflows/west_cmds.yml b/.github/workflows/west_cmds.yml
index 014acaec741..ed75f1d2596 100644
--- a/.github/workflows/west_cmds.yml
+++ b/.github/workflows/west_cmds.yml
@@ -69,7 +69,7 @@ jobs:
     - name: install pytest
       run: |
         pip3 install wheel
-        pip3 install pytest west pyelftools canopen progress mypy intelhex psutil
+        pip3 install pytest west pyelftools canopen progress mypy intelhex psutil ply
     - name: run pytest-win
       if: runner.os == 'Windows'
       run: |