EA attribute specifying whether copy=False is ignored

Author: Aniketsy

pandas/tests/extension/test_numpy.py

@@ -344,11 +344,6 @@ def test_fillna_frame(self, data_missing):
         # Non-scalar "scalar" values.
         super().test_fillna_frame(data_missing)
 
-    @skip_nested
-    def test_fillna_readonly(self, data_missing):
-        # Non-scalar "scalar" values.
-        super().test_fillna_readonly(data_missing)
-
     @skip_nested
     def test_setitem_invalid(self, data, invalid_scalar):
         # object dtype can hold anything, so doesn't raise

pandas/tests/extension/test_sparse.py

@@ -97,6 +97,8 @@ def data_for_compare(request):
 
 
 class TestSparseArray(base.ExtensionTests):
+    _supports_fillna_copy_false = False
+
     def _supports_reduction(self, obj, op_name: str) -> bool:
         return True