diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 0dbff5f0..faeed100 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -1,6 +1,8 @@
-name: Run tests and linters
+name: tests
 on:
   pull_request:
+    branches:
+      - main
     paths:
       - '.github/workflows/python-tests.yml'
       - '**.py'
diff --git a/README.md b/README.md
index 67b42266..a6d20670 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # optuna-dashboard
 
+![tests](https://github.com/c-bata/optuna-dashboard/workflows/tests/badge.svg)
+
 Real-time dashboard for [Optuna](https://github.com/optuna/optuna).
 Code files were originally taken from [Goptuna](https://github.com/c-bata/goptuna).