diff --git a/.github/workflows/test_branches.yml b/.github/workflows/test_branches.yml
index eb7b1b04044..f6fa67213a6 100644
--- a/.github/workflows/test_branches.yml
+++ b/.github/workflows/test_branches.yml
@@ -553,7 +553,8 @@ jobs:
         $BARON_DIR = "${env:TPL_DIR}/baron"
         echo "$BARON_DIR" | `
             Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-        $NEW_PYOMO_PATH = "$BARON_DIR;$PYOMO_PATH"
+        $CURRENT_PYOMO_PATH=$"{env:PYOMO_PATH}"
+        $NEW_PYOMO_PATH = "$BARON_DIR:$NEW_PYOMO_PATH"
         echo "PYOMO_PATH=$NEW_PYOMO_PATH" | `
             Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
         $URL = "https://minlp-downloads.nyc3.cdn.digitaloceanspaces.com/xecs/baron/current/"