diff --git a/.github/workflows/validation-tests.yml b/.github/workflows/validation-tests.yml
index 332f6242..65644015 100644
--- a/.github/workflows/validation-tests.yml
+++ b/.github/workflows/validation-tests.yml
@@ -82,7 +82,7 @@ jobs:
           sudo apt install -y python3-virtualenv python3-pip
           python3 -m pip install pipenv
           python3 -m pipenv install -r requirements.txt
-          echo "VIRTUAL_ENV=$(python3 -m pipenv --venv)/bin/activate" >> $GITHUB_ENV
+          echo "VIRTUAL_ENV=$(python3 -m pipenv --venv)/bin/activate" >> "$GITHUB_ENV"
 
   validation-run-tests:
     needs: [validation-build-mtl]