Maybe fix fixture collection?

Author: h-vetinari

pandas/tests/frame/test_api.py

@@ -401,7 +401,7 @@ def test_with_datetimelikes(self):
         tm.assert_series_equal(result, expected)
 
 
-class TestDataFrameMisc(SharedWithSparse):
+class TestDataFrameMisc(SharedWithSparse, object):
 
     klass = DataFrame
     # SharedWithSparse tests use generic, klass-agnostic assertion