diff --git a/.gitea/workflows/isolation-check.yaml b/.gitea/workflows/isolation-check.yaml
index 58f347b..2353d3c 100644
--- a/.gitea/workflows/isolation-check.yaml
+++ b/.gitea/workflows/isolation-check.yaml
@@ -28,7 +28,7 @@ jobs:
       - name: Dumping environment variables
         run: |
           echo "--- Check for parent variables ---"
-          ( printenv | grep -Pi 'GITEA_RUNNER_REGISTRATION_FILE|GITEA_RUNNER_REGISTRATION_TOKEN_FILE|GITEA_RUNNER_REGISTRATION_TOKEN' ) || true
+          sh -c 'printenv | grep -Pi "GITEA_RUNNER_REGISTRATION_FILE|GITEA_RUNNER_REGISTRATION_TOKEN_FILE|GITEA_RUNNER_REGISTRATION_TOKEN" || true'
           echo "--- List all variables ---"
           printenv