diff --git a/tests/testokkk.py b/tests/testokkk.py
index b5754e2..4738a57 100644
--- a/tests/testokkk.py
+++ b/tests/testokkk.py
@@ -1 +1,11 @@
-ok
\ No newline at end of file
+import unittest
+
+class TestExample(unittest.TestCase):
+          def test_addition(self):
+                    self.assertEqual(1 + 1, 2)
+
+          def test_subtraction(self):
+                    self.assertEqual(5 - 3, 2)
+
+if __name__ == '__main__':
+          unittest.main()
\ No newline at end of file