diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index f76fe7d..84c0aa4 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -72,7 +72,7 @@ jobs:
       - name: Test formatting with isort and black
         run: |
           poetry run isort --check recordmaster/
-          poetry run black .
+          poetry run black --check .
 
   mypy:
     runs-on: ubuntu-22.04
diff --git a/README.md b/README.md
index 4c59362..f800dc9 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-# INWX API
+# INWX DNS Recordmaster
+
+[![Test suites](https://github.com/mxmehl/inwx-dns-recordmaster/actions/workflows/test.yaml/badge.svg)](https://github.com/mxmehl/inwx-dns-recordmaster/actions/workflows/test.yaml)