diff --git a/.gitignore b/.gitignore
index 778641b..0b2e12e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 spotiplayer_pi/__pycache__
+tests/__pycache__
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e2aecde..e4dad02 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,3 +6,12 @@ repos:
         args: ["--ignore=E711,E721"]  
         # args: ["--fix"]  # Automatically apply fixes where possible
       - id: ruff-format
+
+repos:
+  - repo: local
+    hooks:
+      - id: run-unittest
+        name: Run Unit Tests
+        entry: bash -c "python -m unittest discover -s tests -p '*_test.py'" 
+        language: system
+        always_run: true
diff --git a/tests/test_app.py b/tests/test_app.py
new file mode 100644
index 0000000..974841e
--- /dev/null
+++ b/tests/test_app.py
@@ -0,0 +1,54 @@
+import unittest
+from spotiplayer_pi.main import parse_config
+from spotiplayer_pi.api import Api
+
+
+class TestApp(unittest.TestCase):
+    def test_config(self):
+        self.cfg = parse_config()
+
+        # Assertions for config structure and values
+        self.assertIsNotNone(self.cfg["refresh_token"])
+        self.assertIsNotNone(self.cfg["base_64"])
+        self.assertIsInstance(self.cfg["api_interval"], (int, float))
+        self.assertGreater(self.cfg["api_interval"], 0)
+        self.assertIsInstance(self.cfg["refresh_interval"], (int, float))
+        self.assertGreater(self.cfg["refresh_interval"], 0)
+        self.assertIn("color_theme", self.cfg)
+
+        # Check color_theme structure
+        color_theme = self.cfg["color_theme"]
+        self.assertIsInstance(color_theme, dict)
+        for key in ["text", "bar_outline", "bar_inside", "background"]:
+            self.assertIn(key, color_theme)
+            self.assertIsInstance(color_theme[key], tuple)
+            self.assertEqual(len(color_theme[key]), 3)
+            self.assertTrue(
+                all(isinstance(c, int) and 0 <= c <= 255 for c in color_theme[key])
+            )
+
+    def test_refreshAuth(self):
+        self.cfg = parse_config()
+        self.api = Api(self.cfg["refresh_token"], self.cfg["base_64"])
+        expires_in = self.api.refreshAuth()
+
+        self.assertIsNotNone(self.api.access_token)
+        self.assertIsNotNone(expires_in)
+        self.assertGreater(expires_in, 0)
+        self.assertIn("Authorization", self.api.header)
+
+    def test_getPlaying(self):
+        self.cfg = parse_config()
+        self.api = Api(self.cfg["refresh_token"], self.cfg["base_64"])
+        self.api.refreshAuth()
+
+        result = self.api.getPlaying()
+        if result != "not-playing":
+            self.assertIsNotNone(result)
+            self.assertIn("track", result)
+            self.assertIn("album", result)
+            self.assertIn("artists", result)
+
+
+if __name__ == "__main__":
+    unittest.main()