diff --git a/pandas/_libs/tslibs/parsing.pyx b/pandas/_libs/tslibs/parsing.pyx
index 6e191d572529f..1741ff24b1ac8 100644
--- a/pandas/_libs/tslibs/parsing.pyx
+++ b/pandas/_libs/tslibs/parsing.pyx
@@ -2,9 +2,9 @@
 """
 Parsing functions for datetime and datetime-like strings.
 """
-import sys
 import re
 import time
+from io import StringIO
 
 from cpython.datetime cimport datetime
 
@@ -13,13 +13,6 @@ import numpy as np
 
 import six
 
-# Avoid import from outside _libs
-if sys.version_info.major == 2:
-    from StringIO import StringIO
-else:
-    from io import StringIO
-
-
 # dateutil compat
 from dateutil.tz import (tzoffset,
                          tzlocal as _dateutil_tzlocal,
diff --git a/pandas/compat/__init__.py b/pandas/compat/__init__.py
index a2149f8fe6769..115ea96406e51 100644
--- a/pandas/compat/__init__.py
+++ b/pandas/compat/__init__.py
@@ -39,16 +39,9 @@
 
 try:
     import __builtin__ as builtins
-    # not writeable when instantiated with string, doesn't handle unicode well
-    from cStringIO import StringIO as cStringIO
-    # always writeable
-    from StringIO import StringIO
-    BytesIO = StringIO
     import httplib
 except ImportError:
     import builtins
-    from io import StringIO, BytesIO
-    cStringIO = StringIO
     import http.client as httplib
 
 from pandas.compat.chainmap import DeepChainMap
diff --git a/pandas/core/computation/expr.py b/pandas/core/computation/expr.py
index 779cc0df1a6fe..81bc2530e5462 100644
--- a/pandas/core/computation/expr.py
+++ b/pandas/core/computation/expr.py
@@ -3,13 +3,14 @@
 
 import ast
 from functools import partial, reduce
+from io import StringIO
 import itertools as it
 import operator
 import tokenize
 
 import numpy as np
 
-from pandas.compat import StringIO, lmap
+from pandas.compat import lmap
 
 import pandas as pd
 from pandas import compat
diff --git a/pandas/core/computation/scope.py b/pandas/core/computation/scope.py
index dd5d66a4e0b42..62d78b3e207e0 100644
--- a/pandas/core/computation/scope.py
+++ b/pandas/core/computation/scope.py
@@ -4,6 +4,7 @@
 
 import datetime
 import inspect
+from io import StringIO
 import itertools
 import pprint
 import struct
@@ -12,7 +13,7 @@
 import numpy as np
 
 from pandas._libs.tslibs import Timestamp
-from pandas.compat import DeepChainMap, StringIO
+from pandas.compat import DeepChainMap
 
 from pandas.core.base import StringMixin
 import pandas.core.computation as compu
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 88637e4fb456d..13c8e97bff23f 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -13,6 +13,7 @@
 import collections
 from collections import OrderedDict, abc
 import functools
+from io import StringIO
 import itertools
 import sys
 import warnings
@@ -33,7 +34,7 @@
                                      validate_axis_style_args)
 
 from pandas import compat
-from pandas.compat import PY36, StringIO, lmap, lzip, raise_with_traceback
+from pandas.compat import PY36, lmap, lzip, raise_with_traceback
 from pandas.compat.numpy import function as nv
 from pandas.core.dtypes.cast import (
     maybe_upcast,
diff --git a/pandas/core/series.py b/pandas/core/series.py
index a176e4c0b8ae9..8a22765d85aec 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -2,6 +2,7 @@
 Data structure for 1-dimensional cross-sectional and time series data
 """
 from collections import OrderedDict, abc
+from io import StringIO
 from shutil import get_terminal_size
 from textwrap import dedent
 import warnings
@@ -12,7 +13,7 @@
 
 from pandas._libs import iNaT, index as libindex, lib, tslibs
 import pandas.compat as compat
-from pandas.compat import PY36, StringIO
+from pandas.compat import PY36
 from pandas.compat.numpy import function as nv
 from pandas.util._decorators import Appender, Substitution, deprecate
 from pandas.util._validators import validate_bool_kwarg
diff --git a/pandas/io/clipboards.py b/pandas/io/clipboards.py
index 372d74359fe89..d5c9a1f3ec2cf 100644
--- a/pandas/io/clipboards.py
+++ b/pandas/io/clipboards.py
@@ -1,8 +1,8 @@
 """ io on the clipboard """
+from io import StringIO
 import warnings
 
 import pandas.compat as compat
-from pandas.compat import StringIO
 
 from pandas.core.dtypes.generic import ABCDataFrame
 
diff --git a/pandas/io/common.py b/pandas/io/common.py
index 503d155e42e08..bcbfa7930311e 100644
--- a/pandas/io/common.py
+++ b/pandas/io/common.py
@@ -5,6 +5,7 @@
 import csv
 import gzip
 from http.client import HTTPException  # noqa
+from io import BytesIO
 import lzma
 import mmap
 import os
@@ -16,7 +17,6 @@
 import zipfile
 
 import pandas.compat as compat
-from pandas.compat import BytesIO
 from pandas.errors import (  # noqa
     AbstractMethodError, DtypeWarning, EmptyDataError, ParserError,
     ParserWarning)
@@ -411,7 +411,7 @@ def _get_handle(path_or_buf, mode, encoding=None, compression=None,
     return f, handles
 
 
-class BytesZipFile(zipfile.ZipFile, BytesIO):
+class BytesZipFile(zipfile.ZipFile, BytesIO):  # type: ignore
     """
     Wrapper for standard library class ZipFile and allow the returned file-like
     handle to accept byte strings via `write` method.
diff --git a/pandas/io/formats/csvs.py b/pandas/io/formats/csvs.py
index 9f72bf80de744..37f1372366545 100644
--- a/pandas/io/formats/csvs.py
+++ b/pandas/io/formats/csvs.py
@@ -4,6 +4,7 @@
 """
 
 import csv as csvlib
+from io import StringIO
 import os
 import warnings
 from zipfile import ZipFile
@@ -11,7 +12,6 @@
 import numpy as np
 
 from pandas._libs import writers as libwriters
-from pandas.compat import StringIO
 
 from pandas.core.dtypes.generic import (
     ABCDatetimeIndex, ABCIndexClass, ABCMultiIndex, ABCPeriodIndex)
diff --git a/pandas/io/formats/format.py b/pandas/io/formats/format.py
index b658c8a53dc8b..b397a370cecbf 100644
--- a/pandas/io/formats/format.py
+++ b/pandas/io/formats/format.py
@@ -5,6 +5,7 @@
 """
 
 from functools import partial
+from io import StringIO
 from shutil import get_terminal_size
 from unicodedata import east_asian_width
 
@@ -15,7 +16,7 @@
 from pandas._libs import lib
 from pandas._libs.tslib import format_array_from_datetime
 from pandas._libs.tslibs import NaT, Timedelta, Timestamp, iNaT
-from pandas.compat import StringIO, lzip
+from pandas.compat import lzip
 
 from pandas.core.dtypes.common import (
     is_categorical_dtype, is_datetime64_dtype, is_datetime64tz_dtype,
diff --git a/pandas/io/json/json.py b/pandas/io/json/json.py
index 7bb0a00e5ffe3..28cc768ba4e21 100644
--- a/pandas/io/json/json.py
+++ b/pandas/io/json/json.py
@@ -1,4 +1,5 @@
 # pylint: disable-msg=E1101,W0613,W0603
+from io import StringIO
 from itertools import islice
 import os
 
@@ -6,7 +7,7 @@
 
 import pandas._libs.json as json
 from pandas._libs.tslibs import iNaT
-from pandas.compat import StringIO, to_str
+from pandas.compat import to_str
 from pandas.errors import AbstractMethodError
 
 from pandas.core.dtypes.common import is_period_dtype
diff --git a/pandas/io/packers.py b/pandas/io/packers.py
index 562b7540c2f8a..cff0f0e4b34d0 100644
--- a/pandas/io/packers.py
+++ b/pandas/io/packers.py
@@ -39,6 +39,7 @@
 """
 
 from datetime import date, datetime, timedelta
+from io import BytesIO
 import os
 from textwrap import dedent
 import warnings
@@ -46,7 +47,6 @@
 from dateutil.parser import parse
 import numpy as np
 
-import pandas.compat as compat
 from pandas.errors import PerformanceWarning
 from pandas.util._move import (
     BadMove as _BadMove, move_into_mutable_buffer as _move_into_mutable_buffer)
@@ -150,7 +150,7 @@ def writer(fh):
         with open(path_or_buf, mode) as fh:
             writer(fh)
     elif path_or_buf is None:
-        buf = compat.BytesIO()
+        buf = BytesIO()
         writer(buf)
         return buf.getvalue()
     else:
@@ -207,7 +207,7 @@ def read(fh):
         # treat as a binary-like
         fh = None
         try:
-            fh = compat.BytesIO(path_or_buf)
+            fh = BytesIO(path_or_buf)
             return read(fh)
         finally:
             if fh is not None:
@@ -802,12 +802,12 @@ def __iter__(self):
                 if path_exists:
                     fh = open(self.path, 'rb')
                 else:
-                    fh = compat.BytesIO(self.path)
+                    fh = BytesIO(self.path)
 
             else:
 
                 if not hasattr(self.path, 'read'):
-                    fh = compat.BytesIO(self.path)
+                    fh = BytesIO(self.path)
 
                 else:
 
diff --git a/pandas/io/parsers.py b/pandas/io/parsers.py
index f402116d8c4a3..5d73b377838b6 100755
--- a/pandas/io/parsers.py
+++ b/pandas/io/parsers.py
@@ -5,6 +5,7 @@
 from collections import defaultdict
 import csv
 import datetime
+from io import StringIO
 import re
 import sys
 from textwrap import fill
@@ -17,7 +18,7 @@
 import pandas._libs.parsers as parsers
 from pandas._libs.tslibs import parsing
 import pandas.compat as compat
-from pandas.compat import StringIO, lrange, lzip
+from pandas.compat import lrange, lzip
 from pandas.errors import (
     AbstractMethodError, EmptyDataError, ParserError, ParserWarning)
 from pandas.util._decorators import Appender
diff --git a/pandas/io/pickle.py b/pandas/io/pickle.py
index 01c7d747a062a..ce2ed247c158b 100644
--- a/pandas/io/pickle.py
+++ b/pandas/io/pickle.py
@@ -1,10 +1,11 @@
 """ pickle compat """
+from io import BytesIO
 import pickle
 import warnings
 
 from numpy.lib.format import read_array
 
-from pandas.compat import BytesIO, pickle_compat as pc
+from pandas.compat import pickle_compat as pc
 
 from pandas.io.common import _get_handle, _stringify_path
 
diff --git a/pandas/io/sas/sas_xport.py b/pandas/io/sas/sas_xport.py
index 2ddd391de6235..0dbea452230d6 100644
--- a/pandas/io/sas/sas_xport.py
+++ b/pandas/io/sas/sas_xport.py
@@ -9,6 +9,7 @@
 """
 
 from datetime import datetime
+from io import BytesIO
 import struct
 import warnings
 
@@ -17,7 +18,6 @@
 from pandas.util._decorators import Appender
 
 import pandas as pd
-from pandas import compat
 
 from pandas.io.common import BaseIterator, get_filepath_or_buffer
 
@@ -249,7 +249,7 @@ def __init__(self, filepath_or_buffer, index=None, encoding='ISO-8859-1',
                 contents = contents.encode(self._encoding)
             except UnicodeEncodeError:
                 pass
-            self.filepath_or_buffer = compat.BytesIO(contents)
+            self.filepath_or_buffer = BytesIO(contents)
 
         self._read_header()
 
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index 628f77856942d..c613a0837c82b 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -12,6 +12,7 @@
 
 from collections import OrderedDict
 import datetime
+from io import BytesIO
 import os
 import struct
 import sys
@@ -23,7 +24,7 @@
 from pandas._libs.lib import infer_dtype
 from pandas._libs.tslibs import NaT, Timestamp
 from pandas._libs.writers import max_len_string_array
-from pandas.compat import BytesIO, lmap, lrange, lzip
+from pandas.compat import lmap, lrange, lzip
 from pandas.util._decorators import Appender, deprecate_kwarg
 
 from pandas.core.dtypes.common import (
diff --git a/pandas/tests/dtypes/test_inference.py b/pandas/tests/dtypes/test_inference.py
index cca40244f2f3d..ba5ac744ebf05 100644
--- a/pandas/tests/dtypes/test_inference.py
+++ b/pandas/tests/dtypes/test_inference.py
@@ -9,6 +9,7 @@
 from datetime import date, datetime, time, timedelta
 from decimal import Decimal
 from fractions import Fraction
+from io import StringIO
 from numbers import Number
 import re
 
@@ -17,7 +18,7 @@
 import pytz
 
 from pandas._libs import iNaT, lib, missing as libmissing
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 import pandas.util._test_decorators as td
 
 from pandas.core.dtypes import inference
diff --git a/pandas/tests/extension/base/io.py b/pandas/tests/extension/base/io.py
index 7ea62e4e9d678..22787c38b66fb 100644
--- a/pandas/tests/extension/base/io.py
+++ b/pandas/tests/extension/base/io.py
@@ -1,8 +1,8 @@
+from io import StringIO
+
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 import pandas as pd
 
 from .base import BaseExtensionTests
diff --git a/pandas/tests/frame/test_block_internals.py b/pandas/tests/frame/test_block_internals.py
index a9f31a40b5afa..bbb37dd842c55 100644
--- a/pandas/tests/frame/test_block_internals.py
+++ b/pandas/tests/frame/test_block_internals.py
@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 
 from datetime import datetime, timedelta
+from io import StringIO
 import itertools
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 import pandas as pd
 from pandas import (
     Categorical, DataFrame, Series, Timestamp, compat, date_range,
diff --git a/pandas/tests/frame/test_query_eval.py b/pandas/tests/frame/test_query_eval.py
index 3e9f8094a225d..d323a732d4895 100644
--- a/pandas/tests/frame/test_query_eval.py
+++ b/pandas/tests/frame/test_query_eval.py
@@ -1,11 +1,11 @@
 # -*- coding: utf-8 -*-
-
+from io import StringIO
 import operator
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 import pandas.util._test_decorators as td
 
 import pandas as pd
diff --git a/pandas/tests/frame/test_replace.py b/pandas/tests/frame/test_replace.py
index 42e752ea340f5..f44739e83267f 100644
--- a/pandas/tests/frame/test_replace.py
+++ b/pandas/tests/frame/test_replace.py
@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
 
 from datetime import datetime
+from io import StringIO
 import re
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 
 import pandas as pd
 from pandas import DataFrame, Index, Series, Timestamp, compat, date_range
diff --git a/pandas/tests/frame/test_repr_info.py b/pandas/tests/frame/test_repr_info.py
index e4f0b4c6459ae..1e2f87123a63d 100644
--- a/pandas/tests/frame/test_repr_info.py
+++ b/pandas/tests/frame/test_repr_info.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from datetime import datetime, timedelta
+from io import StringIO
 import re
 import sys
 import textwrap
@@ -8,12 +9,11 @@
 import numpy as np
 import pytest
 
-from pandas.compat import PYPY, StringIO, lrange
+from pandas.compat import PYPY, lrange
 
 import pandas as pd
 from pandas import (
-    Categorical, DataFrame, Series, compat, date_range, option_context,
-    period_range)
+    Categorical, DataFrame, Series, date_range, option_context, period_range)
 from pandas.tests.frame.common import TestData
 import pandas.util.testing as tm
 
@@ -494,7 +494,7 @@ def test_info_categorical_column(self):
         df.info(buf=buf)
 
         df2 = df[df['category'] == 'd']
-        buf = compat.StringIO()
+        buf = StringIO()
         df2.info(buf=buf)
 
     def test_repr_categorical_dates_periods(self):
diff --git a/pandas/tests/frame/test_to_csv.py b/pandas/tests/frame/test_to_csv.py
index 7ae941addef6a..20623d98d7ef3 100644
--- a/pandas/tests/frame/test_to_csv.py
+++ b/pandas/tests/frame/test_to_csv.py
@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
 
 import csv
+from io import StringIO
 import os
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lmap, lrange
+from pandas.compat import lmap, lrange
 from pandas.errors import ParserError
 
 import pandas as pd
diff --git a/pandas/tests/groupby/test_apply.py b/pandas/tests/groupby/test_apply.py
index d753556f9978d..91a1ea65b6e5d 100644
--- a/pandas/tests/groupby/test_apply.py
+++ b/pandas/tests/groupby/test_apply.py
@@ -1,4 +1,5 @@
 from datetime import datetime
+from io import StringIO
 
 import numpy as np
 import pytest
@@ -24,9 +25,8 @@ def test_apply_issues():
 2011.05.18,04:00,1.40750
 2011.05.18,05:00,1.40649"""
 
-    df = pd.read_csv(
-        compat.StringIO(s), header=None, names=['date', 'time', 'value'],
-        parse_dates=[['date', 'time']])
+    df = pd.read_csv(StringIO(s), header=None, names=['date', 'time', 'value'],
+                     parse_dates=[['date', 'time']])
     df = df.set_index('date_time')
 
     expected = df.groupby(df.index.date).idxmax()
@@ -35,8 +35,7 @@ def test_apply_issues():
 
     # GH 5789
     # don't auto coerce dates
-    df = pd.read_csv(
-        compat.StringIO(s), header=None, names=['date', 'time', 'value'])
+    df = pd.read_csv(StringIO(s), header=None, names=['date', 'time', 'value'])
     exp_idx = pd.Index(
         ['2011.05.16', '2011.05.17', '2011.05.18'
          ], dtype=object, name='date')
diff --git a/pandas/tests/groupby/test_function.py b/pandas/tests/groupby/test_function.py
index 64fa242e915ba..1bfe0c811d4a6 100644
--- a/pandas/tests/groupby/test_function.py
+++ b/pandas/tests/groupby/test_function.py
@@ -1,3 +1,4 @@
+from io import StringIO
 from string import ascii_lowercase
 
 import numpy as np
@@ -494,7 +495,7 @@ def test_max_nan_bug():
 -05-06,2013-05-06 00:00:00,,log.log
 -05-07,2013-05-07 00:00:00,OE,xlsx"""
 
-    df = pd.read_csv(compat.StringIO(raw), parse_dates=[0])
+    df = pd.read_csv(StringIO(raw), parse_dates=[0])
     gb = df.groupby('Date')
     r = gb[['File']].max()
     e = gb['File'].max().to_frame()
diff --git a/pandas/tests/groupby/test_groupby.py b/pandas/tests/groupby/test_groupby.py
index 4f1e9344c4336..885def32db046 100644
--- a/pandas/tests/groupby/test_groupby.py
+++ b/pandas/tests/groupby/test_groupby.py
@@ -2,11 +2,12 @@
 from collections import OrderedDict, defaultdict
 from datetime import datetime
 from decimal import Decimal
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lmap, lrange, lzip
+from pandas.compat import lmap, lrange, lzip
 from pandas.errors import PerformanceWarning
 
 import pandas as pd
diff --git a/pandas/tests/groupby/test_timegrouper.py b/pandas/tests/groupby/test_timegrouper.py
index a2f2c1392b251..62e1a087a41aa 100644
--- a/pandas/tests/groupby/test_timegrouper.py
+++ b/pandas/tests/groupby/test_timegrouper.py
@@ -1,14 +1,13 @@
 """ test with the TimeGrouper / grouping with datetimes """
 
 from datetime import datetime
+from io import StringIO
 
 import numpy as np
 from numpy import nan
 import pytest
 import pytz
 
-from pandas.compat import StringIO
-
 import pandas as pd
 from pandas import DataFrame, Index, MultiIndex, Series, Timestamp, date_range
 from pandas.core.groupby.ops import BinGrouper
diff --git a/pandas/tests/groupby/test_transform.py b/pandas/tests/groupby/test_transform.py
index 45e7b3239c016..e865dc35c71b0 100644
--- a/pandas/tests/groupby/test_transform.py
+++ b/pandas/tests/groupby/test_transform.py
@@ -1,10 +1,10 @@
 """ test with the .transform """
+from io import StringIO
 
 import numpy as np
 import pytest
 
 from pandas._libs import groupby
-from pandas.compat import StringIO
 
 from pandas.core.dtypes.common import ensure_platform_int, is_timedelta64_dtype
 
diff --git a/pandas/tests/indexes/test_base.py b/pandas/tests/indexes/test_base.py
index 61d3a3cb65cd3..116a12c1c520b 100644
--- a/pandas/tests/indexes/test_base.py
+++ b/pandas/tests/indexes/test_base.py
@@ -2,6 +2,7 @@
 
 from collections import defaultdict
 from datetime import datetime, timedelta
+from io import StringIO
 import math
 import operator
 import re
@@ -13,7 +14,7 @@
 import pandas._config.config as cf
 
 from pandas._libs.tslib import Timestamp
-from pandas.compat import PY36, StringIO, lrange, lzip
+from pandas.compat import PY36, lrange, lzip
 from pandas.compat.numpy import np_datetime64_compat
 
 from pandas.core.dtypes.common import is_unsigned_integer_dtype
diff --git a/pandas/tests/indexing/test_loc.py b/pandas/tests/indexing/test_loc.py
index ae256a0fded2b..56401897afa94 100644
--- a/pandas/tests/indexing/test_loc.py
+++ b/pandas/tests/indexing/test_loc.py
@@ -1,11 +1,11 @@
 """ test label based indexing with loc """
-
+from io import StringIO
 from warnings import catch_warnings, filterwarnings
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 
 import pandas as pd
 from pandas import DataFrame, Series, Timestamp, date_range
diff --git a/pandas/tests/io/formats/test_format.py b/pandas/tests/io/formats/test_format.py
index 0c349f49d46d0..a960dcb9d164a 100644
--- a/pandas/tests/io/formats/test_format.py
+++ b/pandas/tests/io/formats/test_format.py
@@ -5,6 +5,7 @@
 """
 
 from datetime import datetime
+from io import StringIO
 import itertools
 from operator import methodcaller
 import os
@@ -19,8 +20,7 @@
 import pytest
 import pytz
 
-from pandas.compat import (
-    StringIO, is_platform_32bit, is_platform_windows, lrange, lzip)
+from pandas.compat import is_platform_32bit, is_platform_windows, lrange, lzip
 
 import pandas as pd
 from pandas import (
diff --git a/pandas/tests/io/formats/test_to_html.py b/pandas/tests/io/formats/test_to_html.py
index d146e9c16e114..cb90b4edfb7c7 100644
--- a/pandas/tests/io/formats/test_to_html.py
+++ b/pandas/tests/io/formats/test_to_html.py
@@ -1,13 +1,13 @@
 # -*- coding: utf-8 -*-
 
 from datetime import datetime
-from io import open
+from io import StringIO
 import re
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 
 import pandas as pd
 from pandas import DataFrame, Index, MultiIndex, option_context
diff --git a/pandas/tests/io/json/test_pandas.py b/pandas/tests/io/json/test_pandas.py
index dacb15af67083..9ca5bf95e5e08 100644
--- a/pandas/tests/io/json/test_pandas.py
+++ b/pandas/tests/io/json/test_pandas.py
@@ -2,13 +2,14 @@
 # pylint: disable-msg=W0612,E1101
 from collections import OrderedDict
 from datetime import timedelta
+from io import StringIO
 import json
 import os
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, is_platform_32bit, lrange
+from pandas.compat import is_platform_32bit, lrange
 import pandas.util._test_decorators as td
 
 import pandas as pd
diff --git a/pandas/tests/io/json/test_readlines.py b/pandas/tests/io/json/test_readlines.py
index 0cbbe81e57e92..c1eae9e2a4110 100644
--- a/pandas/tests/io/json/test_readlines.py
+++ b/pandas/tests/io/json/test_readlines.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
-import pytest
+from io import StringIO
 
-from pandas.compat import StringIO
+import pytest
 
 import pandas as pd
 from pandas import DataFrame, read_json
diff --git a/pandas/tests/io/json/test_ujson.py b/pandas/tests/io/json/test_ujson.py
index 126a6851ed482..e947100ba8605 100644
--- a/pandas/tests/io/json/test_ujson.py
+++ b/pandas/tests/io/json/test_ujson.py
@@ -7,6 +7,7 @@
 import calendar
 import datetime
 import decimal
+from io import StringIO
 import locale
 import math
 import re
@@ -20,7 +21,6 @@
 import pandas._libs.json as ujson
 from pandas._libs.tslib import Timestamp
 import pandas.compat as compat
-from pandas.compat import StringIO
 
 from pandas import DataFrame, DatetimeIndex, Index, NaT, Series, date_range
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/msgpack/test_pack.py b/pandas/tests/io/msgpack/test_pack.py
index a5fb292a451f5..18a370084ce8b 100644
--- a/pandas/tests/io/msgpack/test_pack.py
+++ b/pandas/tests/io/msgpack/test_pack.py
@@ -1,11 +1,10 @@
 # coding: utf-8
 from collections import OrderedDict
+from io import BytesIO
 import struct
 
 import pytest
 
-from pandas import compat
-
 from pandas.io.msgpack import Packer, Unpacker, packb, unpackb
 
 
@@ -37,8 +36,7 @@ def testPackUnicode(self):
             assert re == td
             packer = Packer(encoding='utf-8')
             data = packer.pack(td)
-            re = Unpacker(
-                compat.BytesIO(data), encoding='utf-8', use_list=1).unpack()
+            re = Unpacker(BytesIO(data), encoding='utf-8', use_list=1).unpack()
             assert re == td
 
     def testPackUTF32(self):
@@ -93,7 +91,7 @@ def testPackFloat(self):
             1.0, use_single_float=False) == b'\xcb' + struct.pack('>d', 1.0)
 
     def testArraySize(self, sizes=[0, 5, 50, 1000]):
-        bio = compat.BytesIO()
+        bio = BytesIO()
         packer = Packer()
         for size in sizes:
             bio.write(packer.pack_array_header(size))
@@ -112,7 +110,7 @@ def test_manualreset(self, sizes=[0, 5, 50, 1000]):
             for i in range(size):
                 packer.pack(i)
 
-        bio = compat.BytesIO(packer.bytes())
+        bio = BytesIO(packer.bytes())
         unpacker = Unpacker(bio, use_list=1)
         for size in sizes:
             assert unpacker.unpack() == list(range(size))
@@ -121,7 +119,7 @@ def test_manualreset(self, sizes=[0, 5, 50, 1000]):
         assert packer.bytes() == b''
 
     def testMapSize(self, sizes=[0, 5, 50, 1000]):
-        bio = compat.BytesIO()
+        bio = BytesIO()
         packer = Packer()
         for size in sizes:
             bio.write(packer.pack_map_header(size))
diff --git a/pandas/tests/io/msgpack/test_sequnpack.py b/pandas/tests/io/msgpack/test_sequnpack.py
index 91f5778a7ce6c..4a767c52d69ce 100644
--- a/pandas/tests/io/msgpack/test_sequnpack.py
+++ b/pandas/tests/io/msgpack/test_sequnpack.py
@@ -1,9 +1,8 @@
 # coding: utf-8
+from io import BytesIO
 
 import pytest
 
-from pandas import compat
-
 from pandas.io.msgpack import BufferFull, OutOfData, Unpacker
 
 
@@ -85,7 +84,7 @@ def test_readbytes(self):
         assert unpacker.unpack() == ord(b'r')
 
         # Test buffer refill
-        unpacker = Unpacker(compat.BytesIO(b'foobar'), read_size=3)
+        unpacker = Unpacker(BytesIO(b'foobar'), read_size=3)
         assert unpacker.unpack() == ord(b'f')
         assert unpacker.read_bytes(3) == b'oob'
         assert unpacker.unpack() == ord(b'a')
diff --git a/pandas/tests/io/parser/test_c_parser_only.py b/pandas/tests/io/parser/test_c_parser_only.py
index 0e10c3f3f860e..22157a742bacc 100644
--- a/pandas/tests/io/parser/test_c_parser_only.py
+++ b/pandas/tests/io/parser/test_c_parser_only.py
@@ -7,7 +7,7 @@
 further arguments when parsing.
 """
 
-from io import TextIOWrapper
+from io import BytesIO, StringIO, TextIOWrapper
 import mmap
 import os
 import tarfile
@@ -15,7 +15,7 @@
 import numpy as np
 import pytest
 
-from pandas.compat import BytesIO, StringIO, lrange
+from pandas.compat import lrange
 from pandas.errors import ParserError
 import pandas.util._test_decorators as td
 
diff --git a/pandas/tests/io/parser/test_comment.py b/pandas/tests/io/parser/test_comment.py
index 299a04f876bd1..5ed8e6ea3a6ac 100644
--- a/pandas/tests/io/parser/test_comment.py
+++ b/pandas/tests/io/parser/test_comment.py
@@ -4,12 +4,11 @@
 Tests that comments are properly handled during parsing
 for all of the parsers defined in parsers.py
 """
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 from pandas import DataFrame
 import pandas.util.testing as tm
 
diff --git a/pandas/tests/io/parser/test_common.py b/pandas/tests/io/parser/test_common.py
index b9f6f2ee8c7c1..3034d54c52c45 100644
--- a/pandas/tests/io/parser/test_common.py
+++ b/pandas/tests/io/parser/test_common.py
@@ -9,6 +9,7 @@
 from collections import OrderedDict
 import csv
 from datetime import datetime
+from io import BytesIO, StringIO
 import os
 import platform
 from tempfile import TemporaryFile
@@ -17,7 +18,7 @@
 import pytest
 
 from pandas._libs.tslib import Timestamp
-from pandas.compat import BytesIO, StringIO, lrange
+from pandas.compat import lrange
 from pandas.errors import DtypeWarning, EmptyDataError, ParserError
 
 from pandas import DataFrame, Index, MultiIndex, Series, compat, concat
diff --git a/pandas/tests/io/parser/test_converters.py b/pandas/tests/io/parser/test_converters.py
index 47bbae0274fd3..a654343f9352b 100644
--- a/pandas/tests/io/parser/test_converters.py
+++ b/pandas/tests/io/parser/test_converters.py
@@ -4,11 +4,12 @@
 Tests column conversion functionality during parsing
 for all of the parsers defined in parsers.py
 """
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lmap, parse_date
+from pandas.compat import lmap, parse_date
 
 import pandas as pd
 from pandas import DataFrame, Index
diff --git a/pandas/tests/io/parser/test_dialect.py b/pandas/tests/io/parser/test_dialect.py
index 5392f793b361c..4665fbaf3414a 100644
--- a/pandas/tests/io/parser/test_dialect.py
+++ b/pandas/tests/io/parser/test_dialect.py
@@ -6,10 +6,10 @@
 """
 
 import csv
+from io import StringIO
 
 import pytest
 
-from pandas.compat import StringIO
 from pandas.errors import ParserWarning
 
 from pandas import DataFrame
diff --git a/pandas/tests/io/parser/test_dtypes.py b/pandas/tests/io/parser/test_dtypes.py
index caa03fc3685f6..325def2bb8add 100644
--- a/pandas/tests/io/parser/test_dtypes.py
+++ b/pandas/tests/io/parser/test_dtypes.py
@@ -4,13 +4,12 @@
 Tests dtype specification during parsing
 for all of the parsers defined in parsers.py
 """
-
+from io import StringIO
 import os
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
 from pandas.errors import ParserWarning
 
 from pandas.core.dtypes.dtypes import CategoricalDtype
diff --git a/pandas/tests/io/parser/test_header.py b/pandas/tests/io/parser/test_header.py
index b6854e0868aa0..b2304350f6626 100644
--- a/pandas/tests/io/parser/test_header.py
+++ b/pandas/tests/io/parser/test_header.py
@@ -6,11 +6,11 @@
 """
 
 from collections import namedtuple
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
 from pandas.errors import ParserError
 
 from pandas import DataFrame, Index, MultiIndex
diff --git a/pandas/tests/io/parser/test_index_col.py b/pandas/tests/io/parser/test_index_col.py
index b1e02df693932..9d2ebf950c535 100644
--- a/pandas/tests/io/parser/test_index_col.py
+++ b/pandas/tests/io/parser/test_index_col.py
@@ -5,11 +5,10 @@
 is properly handled or inferred during parsing for all of
 the parsers defined in parsers.py
 """
+from io import StringIO
 
 import pytest
 
-from pandas.compat import StringIO
-
 from pandas import DataFrame, Index, MultiIndex
 import pandas.util.testing as tm
 
diff --git a/pandas/tests/io/parser/test_mangle_dupes.py b/pandas/tests/io/parser/test_mangle_dupes.py
index 0efc0c2c13557..e0ac7dc6e4d78 100644
--- a/pandas/tests/io/parser/test_mangle_dupes.py
+++ b/pandas/tests/io/parser/test_mangle_dupes.py
@@ -5,11 +5,10 @@
 CSV engine. In general, the expected result is that they are either thoroughly
 de-duplicated (if mangling requested) or ignored otherwise.
 """
+from io import StringIO
 
 import pytest
 
-from pandas.compat import StringIO
-
 from pandas import DataFrame
 import pandas.util.testing as tm
 
diff --git a/pandas/tests/io/parser/test_multi_thread.py b/pandas/tests/io/parser/test_multi_thread.py
index bc3eff9598380..2e6cdd3ab2240 100644
--- a/pandas/tests/io/parser/test_multi_thread.py
+++ b/pandas/tests/io/parser/test_multi_thread.py
@@ -4,13 +4,11 @@
 Tests multithreading behaviour for reading and
 parsing files for each parser defined in parsers.py
 """
-
+from io import BytesIO
 from multiprocessing.pool import ThreadPool
 
 import numpy as np
 
-from pandas.compat import BytesIO
-
 import pandas as pd
 from pandas import DataFrame
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/parser/test_na_values.py b/pandas/tests/io/parser/test_na_values.py
index e6f44eccb0762..4fe73c65cecf7 100644
--- a/pandas/tests/io/parser/test_na_values.py
+++ b/pandas/tests/io/parser/test_na_values.py
@@ -4,12 +4,11 @@
 Tests that NA values are properly handled during
 parsing for all of the parsers defined in parsers.py
 """
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 from pandas import DataFrame, Index, MultiIndex
 import pandas.util.testing as tm
 
diff --git a/pandas/tests/io/parser/test_network.py b/pandas/tests/io/parser/test_network.py
index cb5453f20b525..b36508d89d770 100644
--- a/pandas/tests/io/parser/test_network.py
+++ b/pandas/tests/io/parser/test_network.py
@@ -4,12 +4,12 @@
 Tests parsers ability to read and parse non-local files
 and hence require a network connection to be read.
 """
+from io import BytesIO, StringIO
 import logging
 
 import numpy as np
 import pytest
 
-from pandas.compat import BytesIO, StringIO
 import pandas.util._test_decorators as td
 
 from pandas import DataFrame
diff --git a/pandas/tests/io/parser/test_parse_dates.py b/pandas/tests/io/parser/test_parse_dates.py
index ffc8af09bf239..f719035a10609 100644
--- a/pandas/tests/io/parser/test_parse_dates.py
+++ b/pandas/tests/io/parser/test_parse_dates.py
@@ -6,6 +6,7 @@
 """
 
 from datetime import date, datetime
+from io import StringIO
 
 import numpy as np
 import pytest
@@ -13,7 +14,7 @@
 
 from pandas._libs.tslib import Timestamp
 from pandas._libs.tslibs import parsing
-from pandas.compat import StringIO, lrange, parse_date
+from pandas.compat import lrange, parse_date
 from pandas.compat.numpy import np_array_datetime64_compat
 
 import pandas as pd
diff --git a/pandas/tests/io/parser/test_python_parser_only.py b/pandas/tests/io/parser/test_python_parser_only.py
index ad50f729a69f9..3c249c9d7b72c 100644
--- a/pandas/tests/io/parser/test_python_parser_only.py
+++ b/pandas/tests/io/parser/test_python_parser_only.py
@@ -8,10 +8,10 @@
 """
 
 import csv
+from io import BytesIO, StringIO
 
 import pytest
 
-from pandas.compat import BytesIO, StringIO
 from pandas.errors import ParserError
 
 from pandas import DataFrame, Index, MultiIndex
diff --git a/pandas/tests/io/parser/test_quoting.py b/pandas/tests/io/parser/test_quoting.py
index 961b276c2004f..b490b5213e8cd 100644
--- a/pandas/tests/io/parser/test_quoting.py
+++ b/pandas/tests/io/parser/test_quoting.py
@@ -6,10 +6,10 @@
 """
 
 import csv
+from io import StringIO
 
 import pytest
 
-from pandas.compat import StringIO
 from pandas.errors import ParserError
 
 from pandas import DataFrame
diff --git a/pandas/tests/io/parser/test_read_fwf.py b/pandas/tests/io/parser/test_read_fwf.py
index 72360a8a7468d..0928c332cb48e 100644
--- a/pandas/tests/io/parser/test_read_fwf.py
+++ b/pandas/tests/io/parser/test_read_fwf.py
@@ -7,12 +7,11 @@
 """
 
 from datetime import datetime
+from io import BytesIO, StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import BytesIO, StringIO
-
 import pandas as pd
 from pandas import DataFrame, DatetimeIndex
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/parser/test_skiprows.py b/pandas/tests/io/parser/test_skiprows.py
index c469813f1b71e..18a0cbd18fd43 100644
--- a/pandas/tests/io/parser/test_skiprows.py
+++ b/pandas/tests/io/parser/test_skiprows.py
@@ -6,11 +6,12 @@
 """
 
 from datetime import datetime
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO, lrange
+from pandas.compat import lrange
 from pandas.errors import EmptyDataError
 
 from pandas import DataFrame, Index
diff --git a/pandas/tests/io/parser/test_textreader.py b/pandas/tests/io/parser/test_textreader.py
index 9195b577a4c8f..c5bac4724d70b 100644
--- a/pandas/tests/io/parser/test_textreader.py
+++ b/pandas/tests/io/parser/test_textreader.py
@@ -4,7 +4,7 @@
 Tests the TextReader class in parsers.pyx, which
 is integral to the C engine in parsers.py
 """
-
+from io import BytesIO, StringIO
 import os
 
 import numpy as np
@@ -14,7 +14,6 @@
 import pandas._libs.parsers as parser
 from pandas._libs.parsers import TextReader
 import pandas.compat as compat
-from pandas.compat import BytesIO, StringIO
 
 from pandas import DataFrame
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/parser/test_unsupported.py b/pandas/tests/io/parser/test_unsupported.py
index 8c6dbd64c785d..21949586a37ef 100644
--- a/pandas/tests/io/parser/test_unsupported.py
+++ b/pandas/tests/io/parser/test_unsupported.py
@@ -8,10 +8,10 @@
 Ultimately, the goal is to remove test cases from this
 test suite as new feature support is added to the parsers.
 """
+from io import StringIO
 
 import pytest
 
-from pandas.compat import StringIO
 from pandas.errors import ParserError
 
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/parser/test_usecols.py b/pandas/tests/io/parser/test_usecols.py
index 8367c32f25d3f..4e1f3e9be5086 100644
--- a/pandas/tests/io/parser/test_usecols.py
+++ b/pandas/tests/io/parser/test_usecols.py
@@ -4,12 +4,12 @@
 Tests the usecols functionality during parsing
 for all of the parsers defined in parsers.py
 """
+from io import StringIO
 
 import numpy as np
 import pytest
 
 from pandas._libs.tslib import Timestamp
-from pandas.compat import StringIO
 
 from pandas import DataFrame, Index
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/sas/test_sas.py b/pandas/tests/io/sas/test_sas.py
index 34bca1e5b74a1..0e0abe0dae7d1 100644
--- a/pandas/tests/io/sas/test_sas.py
+++ b/pandas/tests/io/sas/test_sas.py
@@ -1,6 +1,6 @@
-import pytest
+from io import StringIO
 
-from pandas.compat import StringIO
+import pytest
 
 from pandas import read_sas
 import pandas.util.testing as tm
diff --git a/pandas/tests/io/test_common.py b/pandas/tests/io/test_common.py
index f89586068ff93..21479c57fb65a 100644
--- a/pandas/tests/io/test_common.py
+++ b/pandas/tests/io/test_common.py
@@ -1,12 +1,13 @@
 """
 Tests for the pandas.io.common functionalities
 """
+from io import StringIO
 import mmap
 import os
 
 import pytest
 
-from pandas.compat import StringIO, is_platform_windows
+from pandas.compat import is_platform_windows
 import pandas.util._test_decorators as td
 
 import pandas as pd
diff --git a/pandas/tests/io/test_excel.py b/pandas/tests/io/test_excel.py
index e02fa1d5edc74..1377888a58d07 100644
--- a/pandas/tests/io/test_excel.py
+++ b/pandas/tests/io/test_excel.py
@@ -3,6 +3,7 @@
 from datetime import date, datetime, time, timedelta
 from distutils.version import LooseVersion
 from functools import partial
+from io import BytesIO
 import os
 import warnings
 
@@ -10,7 +11,7 @@
 from numpy import nan
 import pytest
 
-from pandas.compat import PY36, BytesIO, iteritems
+from pandas.compat import PY36, iteritems
 import pandas.util._test_decorators as td
 
 import pandas as pd
diff --git a/pandas/tests/io/test_gcs.py b/pandas/tests/io/test_gcs.py
index ec0631e748dfc..86e56248ae9d3 100644
--- a/pandas/tests/io/test_gcs.py
+++ b/pandas/tests/io/test_gcs.py
@@ -1,8 +1,8 @@
+from io import StringIO
+
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 from pandas import DataFrame, date_range, read_csv
 from pandas.util import _test_decorators as td
 from pandas.util.testing import assert_frame_equal
diff --git a/pandas/tests/io/test_html.py b/pandas/tests/io/test_html.py
index 36b2ac28c067e..42b13745b90b3 100644
--- a/pandas/tests/io/test_html.py
+++ b/pandas/tests/io/test_html.py
@@ -1,5 +1,6 @@
 from functools import partial
 from importlib import reload
+from io import BytesIO, StringIO
 import os
 import re
 import threading
@@ -8,7 +9,7 @@
 from numpy.random import rand
 import pytest
 
-from pandas.compat import BytesIO, StringIO, is_platform_windows
+from pandas.compat import is_platform_windows
 from pandas.errors import ParserError
 import pandas.util._test_decorators as td
 
diff --git a/pandas/tests/io/test_packers.py b/pandas/tests/io/test_packers.py
index 90fb2b15162e5..c24adcbf29477 100644
--- a/pandas/tests/io/test_packers.py
+++ b/pandas/tests/io/test_packers.py
@@ -1,6 +1,7 @@
 import datetime
 from distutils.version import LooseVersion
 import glob
+from io import BytesIO
 import os
 from warnings import catch_warnings
 
@@ -113,7 +114,7 @@ def test_string_io(self):
         tm.assert_frame_equal(result, df)
 
         s = df.to_msgpack()
-        result = read_msgpack(compat.BytesIO(s))
+        result = read_msgpack(BytesIO(s))
         tm.assert_frame_equal(result, df)
 
         s = to_msgpack(None, df)
diff --git a/pandas/tests/io/test_pytables.py b/pandas/tests/io/test_pytables.py
index e45ca1afdcef9..f7b81d1b07694 100644
--- a/pandas/tests/io/test_pytables.py
+++ b/pandas/tests/io/test_pytables.py
@@ -2,6 +2,7 @@
 import datetime
 from datetime import timedelta
 from distutils.version import LooseVersion
+from io import BytesIO
 import os
 import tempfile
 from warnings import catch_warnings, simplefilter
@@ -10,8 +11,7 @@
 import pytest
 
 from pandas.compat import (
-    PY35, PY36, BytesIO, is_platform_little_endian, is_platform_windows,
-    lrange)
+    PY35, PY36, is_platform_little_endian, is_platform_windows, lrange)
 import pandas.util._test_decorators as td
 
 from pandas.core.dtypes.common import is_categorical_dtype
diff --git a/pandas/tests/io/test_s3.py b/pandas/tests/io/test_s3.py
index 32eae8ed328f4..d347e08d0500f 100644
--- a/pandas/tests/io/test_s3.py
+++ b/pandas/tests/io/test_s3.py
@@ -1,6 +1,6 @@
-import pytest
+from io import BytesIO
 
-from pandas.compat import BytesIO
+import pytest
 
 from pandas import read_csv
 
diff --git a/pandas/tests/io/test_sql.py b/pandas/tests/io/test_sql.py
index 959682703ec2b..637697aa2ffcb 100644
--- a/pandas/tests/io/test_sql.py
+++ b/pandas/tests/io/test_sql.py
@@ -19,13 +19,13 @@
 
 import csv
 from datetime import date, datetime, time
+from io import StringIO
 import sqlite3
 import warnings
 
 import numpy as np
 import pytest
 
-import pandas.compat as compat
 from pandas.compat import PY36, lrange
 
 from pandas.core.dtypes.common import (
@@ -1939,7 +1939,7 @@ def psql_insert_copy(table, conn, keys, data_iter):
             # gets a DBAPI connection that can provide a cursor
             dbapi_conn = conn.connection
             with dbapi_conn.cursor() as cur:
-                s_buf = compat.StringIO()
+                s_buf = StringIO()
                 writer = csv.writer(s_buf)
                 writer.writerows(data_iter)
                 s_buf.seek(0)
diff --git a/pandas/tests/resample/test_datetime_index.py b/pandas/tests/resample/test_datetime_index.py
index 0c6ef9ebc75fe..51a5c992e894b 100644
--- a/pandas/tests/resample/test_datetime_index.py
+++ b/pandas/tests/resample/test_datetime_index.py
@@ -1,11 +1,11 @@
 from datetime import datetime, timedelta
 from functools import partial
+from io import StringIO
 
 import numpy as np
 import pytest
 import pytz
 
-from pandas.compat import StringIO
 from pandas.errors import UnsupportedFunctionCall
 
 import pandas as pd
diff --git a/pandas/tests/reshape/test_concat.py b/pandas/tests/reshape/test_concat.py
index 6036ca1a3e6cf..5080db9354a1f 100644
--- a/pandas/tests/reshape/test_concat.py
+++ b/pandas/tests/reshape/test_concat.py
@@ -2,6 +2,7 @@
 import datetime as dt
 from datetime import datetime
 from decimal import Decimal
+from io import StringIO
 from itertools import combinations
 from warnings import catch_warnings
 
@@ -10,7 +11,7 @@
 from numpy.random import randn
 import pytest
 
-from pandas.compat import StringIO, iteritems
+from pandas.compat import iteritems
 
 from pandas.core.dtypes.dtypes import CategoricalDtype
 
diff --git a/pandas/tests/series/test_io.py b/pandas/tests/series/test_io.py
index fbf34dbde7c62..20cc05f9a5cee 100644
--- a/pandas/tests/series/test_io.py
+++ b/pandas/tests/series/test_io.py
@@ -3,12 +3,11 @@
 
 import collections
 from datetime import datetime
+from io import StringIO
 
 import numpy as np
 import pytest
 
-from pandas.compat import StringIO
-
 import pandas as pd
 from pandas import DataFrame, Series
 import pandas.util.testing as tm
diff --git a/pandas/tests/series/test_timeseries.py b/pandas/tests/series/test_timeseries.py
index 0f7902aeefe44..02186a5bb5bd4 100644
--- a/pandas/tests/series/test_timeseries.py
+++ b/pandas/tests/series/test_timeseries.py
@@ -2,13 +2,14 @@
 # pylint: disable-msg=E1101,W0612
 
 from datetime import datetime, time, timedelta
+from io import StringIO
 
 import numpy as np
 import pytest
 
 from pandas._libs.tslib import iNaT
 from pandas._libs.tslibs.np_datetime import OutOfBoundsDatetime
-from pandas.compat import StringIO, lrange, product
+from pandas.compat import lrange, product
 from pandas.errors import NullFrequencyError
 import pandas.util._test_decorators as td
 
diff --git a/pandas/tests/test_base.py b/pandas/tests/test_base.py
index 1aca17f6b6d1c..9539519604a24 100644
--- a/pandas/tests/test_base.py
+++ b/pandas/tests/test_base.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 from datetime import datetime, timedelta
+from io import StringIO
 import re
 import sys
 
@@ -7,7 +8,7 @@
 import pytest
 
 from pandas._libs.tslib import iNaT
-from pandas.compat import PYPY, StringIO
+from pandas.compat import PYPY
 from pandas.compat.numpy import np_array_datetime64_compat
 
 from pandas.core.dtypes.common import (
diff --git a/pandas/tests/test_multilevel.py b/pandas/tests/test_multilevel.py
index bc58606965da1..3157d800a649c 100644
--- a/pandas/tests/test_multilevel.py
+++ b/pandas/tests/test_multilevel.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 # pylint: disable-msg=W0612,E1101,W0141
 import datetime
+from io import StringIO
 import itertools
 from warnings import catch_warnings, simplefilter
 
@@ -9,7 +10,7 @@
 import pytest
 import pytz
 
-from pandas.compat import StringIO, lrange, lzip, product as cart_product
+from pandas.compat import lrange, lzip, product as cart_product
 
 from pandas.core.dtypes.common import is_float_dtype, is_integer_dtype