diff --git a/tests/test_decode.py b/tests/test_decode.py
index a0c6129..8e0fd4c 100644
--- a/tests/test_decode.py
+++ b/tests/test_decode.py
@@ -256,7 +256,7 @@ class Pet:
         pet = decode(pet_data, Pet)
 
 
-@pytest.mark.skipif(sys.version_info >= (3, 10))
+@pytest.mark.skipif(sys.version_info >= (3, 10), reason="Unsupported python version")
 def test_can_decode_new_optional_type_notation() -> None:
     # given
     @decodable
diff --git a/tests/test_encode.py b/tests/test_encode.py
index 8c16af9..cb5a3c6 100644
--- a/tests/test_encode.py
+++ b/tests/test_encode.py
@@ -299,7 +299,7 @@ def test_can_encode_regex_with_flags_into_string() -> None:
     assert result == f"/{pattern_str}/imsx"
 
 
-@pytest.mark.skipif(sys.version_info >= (3, 10))
+@pytest.mark.skipif(sys.version_info >= (3, 10), reason="Unsupported python version")
 def test_can_encode_new_optional_type_notation() -> None:
     # given
     @encodable