diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..2b04bd3
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,22 @@
+name: Tests
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v6
+        with:
+          enable-cache: true
+      - name: Install Python
+        run: uv python install 3.12
+      - name: Install dependencies
+        run: uv sync --frozen --python 3.12
+      - name: Run tests
+        run: uv run --python 3.12 python -m unittest discover -s tests -v
diff --git a/tests/test_run_bash_script.py b/tests/test_run_bash_script.py
new file mode 100644
index 0000000..15ae17b
--- /dev/null
+++ b/tests/test_run_bash_script.py
@@ -0,0 +1,34 @@
+import tempfile
+import unittest
+from pathlib import Path
+
+from src.server import app
+
+
+class RunBashScriptTest(unittest.TestCase):
+    def test_executes_script_and_returns_output(self) -> None:
+        with tempfile.TemporaryDirectory() as working_dir:
+            marker = Path(working_dir) / "marker.txt"
+            script = f"printf osworld-server-ok | tee {marker.name}"
+
+            with app.test_client() as client:
+                response = client.post(
+                    "/run_bash_script",
+                    json={"script": script, "working_dir": working_dir},
+                )
+
+            self.assertEqual(response.status_code, 200, response.get_json())
+            self.assertEqual(
+                response.get_json(),
+                {
+                    "status": "success",
+                    "output": "osworld-server-ok",
+                    "error": "",
+                    "returncode": 0,
+                },
+            )
+            self.assertEqual(marker.read_text(), "osworld-server-ok")
+
+
+if __name__ == "__main__":
+    unittest.main()