diff --git a/tests/test_string_utils.py b/tests/test_string_utils.py
new file mode 100644
index 0000000..21c6248
--- /dev/null
+++ b/tests/test_string_utils.py
@@ -0,0 +1,15 @@
+import unittest
+from utils.string_utils import capitalize_first_letter, reverse_string
+
+
+class TestStringUtils(unittest.TestCase):
+    def test_capitalize_first_letter(self):
+        self.assertEqual(capitalize_first_letter('hello'), 'Hello')
+        self.assertEqual(capitalize_first_letter(''), '')
+
+    def test_reverse_string(self):
+        self.assertEqual(reverse_string('hello'), 'olleh')
+
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file