diff --git a/tests/__init__py b/tests/__init__py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_copier.py b/tests/test_copier.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_organizer.py b/tests/test_organizer.py
new file mode 100644
index 0000000..23ba808
--- /dev/null
+++ b/tests/test_organizer.py
@@ -0,0 +1,15 @@
+import unittest
+from organizer import categorizar_por_tipo
+from pathlib import Path
+
+
+class TestOrganizer(unittest.TestCase):
+    def test_categorizar_por_tipo(self):
+        self.assertEqual(categorizar_por_tipo("imagem.jpg"), "imagem")
+        self.assertEqual(categorizar_por_tipo("documento.pdf"), "documento")
+        self.assertEqual(categorizar_por_tipo("video.mp4"), "video")
+        self.assertEqual(categorizar_por_tipo("ficheiro.zip"), "outro")
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_scanner.py b/tests/test_scanner.py
new file mode 100644
index 0000000..e69de29