diff --git a/dbf/test.py b/dbf/test.py
index 117f611..34a9507 100755
--- a/dbf/test.py
+++ b/dbf/test.py
@@ -4814,6 +4814,7 @@ def test_index_search(self):
         self.assertEqual(sorted.index_search('jul', partial=True), 9)
         self.assertTrue(sorted.index_search('jul', partial=True))
 
+    @unittest.skipIf(sys.platform == 'darwin', 'fails on case-insensitive filesystems')
     def test_mismatched_extensions(self):
         old_memo_name = self.dbf_table._meta.memoname
         new_memo_name = old_memo_name[:-3] + 'Dbt'