diff --git a/thicket/tests/test_model_extrap.py b/thicket/tests/test_model_extrap.py
index 101e7045..3a1cbb9d 100644
--- a/thicket/tests/test_model_extrap.py
+++ b/thicket/tests/test_model_extrap.py
@@ -23,7 +23,7 @@
 except ImportError:
     extrap_avail = False
 
-if not sys.version_info < (3, 8):
+if sys.version_info < (3, 8):
     pytest.skip(
         "requires python3.8 or greater to use extrap module", allow_module_level=True
     )