simpify tests

Author: topper-123

pandas/tests/extension/base/interface.py

@@ -37,14 +37,14 @@ def test_contains(self, data):
 
         na_value = data.dtype.na_value
         other_na_value_types = {None, np.nan, pd.NA, pd.NaT}.difference({na_value})
+
         if data.isna().any():
             assert na_value in data
-            for na_value_type in other_na_value_types:
-                assert na_value_type not in data
         else:
             assert na_value not in data
-            for na_value_type in other_na_value_types:
-                assert na_value_type not in data
+
+        for na_value_type in other_na_value_types:
+            assert na_value_type not in data
 
     def test_memory_usage(self, data):
         s = pd.Series(data)