diff --git a/.github/workflows/python-test.yml b/.github/workflows/python-test.yml
new file mode 100644
index 0000000..58f8050
--- /dev/null
+++ b/.github/workflows/python-test.yml
@@ -0,0 +1,25 @@
+name: Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: pip install -e . pytest
+
+      - name: Test
+        run: pytest tests/ -v
diff --git a/README.md b/README.md
index 0aa24aa..308bf40 100755
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![PyPI version](https://badge.fury.io/py/CNSistent.svg)](https://badge.fury.io/py/CNSistent)
 [![Documentation Status](https://readthedocs.org/projects/cnsistent/badge/?version=latest)](https://cnsistent.readthedocs.io/en/latest/?badge=latest)
+[![Tests](https://github.com/ICCB-Cologne/CNSistent/actions/workflows/python-test.yml/badge.svg)](https://github.com/ICCB-Cologne/CNSistent/actions/workflows/python-test.yml)
 
 CNSistent is a Python tool for processing and analyzing copy number data. It is designed to work with data from a variety of sources. The tool is designed to be easy to use, and to provide a comprehensive set of analyses and visualizations.