diff --git a/.github/workflows/pytest_demo.yaml b/.github/workflows/pytest_demo.yaml
index 1fef65d..27b9aa9 100644
--- a/.github/workflows/pytest_demo.yaml
+++ b/.github/workflows/pytest_demo.yaml
@@ -1,6 +1,6 @@
 name: pytest Demo
 run-name: ${{ github.actor }} is testing out by pytest 🚀
-on: [push, workflow_dispatch]
+on: [pull_request, workflow_dispatch]
 jobs:
   Pytest-CICD-demo:
     runs-on: ubuntu-latest
diff --git a/test_first.py b/test_first.py
index 4a1d678..0def490 100644
--- a/test_first.py
+++ b/test_first.py
@@ -3,5 +3,5 @@
 def test_add_normal():
     assert add(1, 2) == 3
 
-# def test_add_str():
-#     assert add("A", "B") == "AB"
\ No newline at end of file
+def test_add_str():
+    assert add("A", "B") == "AB"
\ No newline at end of file