diff --git a/.gitea/workflows/action.yaml b/.gitea/workflows/action.yaml
index c96a5646..280e0c6f 100644
--- a/.gitea/workflows/action.yaml
+++ b/.gitea/workflows/action.yaml
@@ -73,7 +73,7 @@ jobs:
         env:
           PYTEST_DISABLE_PLUGIN_AUTOLOAD: "1"
           QT_QPA_PLATFORM: offscreen
-          MX_BEAMLINE: SIMULATED
+          BEAMLINE: SIMULATED
         run: |
           source venv/bin/activate