diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8f79830..abf444e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,6 +20,9 @@ jobs:
         uses: actions/setup-python@v1
         with:
           python-version: '3.x'
+      - run: grep --version
+      - run: echo "123" | grep -e "\d"
+      - run: echo "123" | grep "\d"
       - run: echo "123" | grep -E "\d"
       - run: echo "123" | ./internal/test_helpers/pass_all/your_grep.sh -E "\d"
       - run: make test