TST: windows failures
```
======================================================================
FAIL: test_c_engine (pandas.io.tests.parser.test_unsupported.TestUnsupportedFeatures)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\conda\Documents\pandas3.5\pandas\io\tests\parser\test_unsupported.py", line 64, in test_c_engine
    read_table(StringIO(data), engine='c', sep='\xa7')
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 2437, in __exit__
    raise AssertionError("{0} not raised.".format(name))
AssertionError: ValueError not raised.
```

closed in #14140 

```
======================================================================
FAIL: test_append_zero (pandas.sparse.tests.test_list.TestSparseList)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\conda\Documents\pandas3.5\pandas\sparse\tests\test_list.py", line 64, in test_append_zero
    tm.assert_sp_array_equal(sparr, SparseArray(arr, fill_value=0))
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1392, in assert_sp_array_equal
    assert_numpy_array_equal(left.sp_values, right.sp_values)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1083, in assert_numpy_array_equal
    assert_attr_equal('dtype', left, right, obj=obj)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 878, in assert_attr_equal
    left_attr, right_attr)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute "dtype" are different
[left]:  int64
[right]: int32

======================================================================
FAIL: test_dataframe_dummies_prefix_str (pandas.tests.test_reshape.TestGetDummies)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\conda\Documents\pandas3.5\pandas\tests\test_reshape.py", line 327, in test_dataframe_dummies_prefix_str
    assert_frame_equal(result, expected)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1313, in assert_frame_equal
    obj='DataFrame.iloc[:, {0}]'.format(i))
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1154, in assert_series_equal
    assert_attr_equal('dtype', left, right)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 878, in assert_attr_equal
    left_attr, right_attr)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Attributes are different

Attribute "dtype" are different
[left]:  int64
[right]: int32

======================================================================
FAIL: test_dataframe_dummies_prefix_str (pandas.tests.test_reshape.TestGetDummiesSparse)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\conda\Documents\pandas3.5\pandas\tests\test_reshape.py", line 327, in test_dataframe_dummies_prefix_str
    assert_frame_equal(result, expected)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1313, in assert_frame_equal
    obj='DataFrame.iloc[:, {0}]'.format(i))
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1154, in assert_series_equal
    assert_attr_equal('dtype', left, right)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 878, in assert_attr_equal
    left_attr, right_attr)
  File "C:\Users\conda\Documents\pandas3.5\pandas\util\testing.py", line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: Attributes are different

Attribute "dtype" are different
[left]:  int64
[right]: int32
```
