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pandas-dev · Feb 1, 2020 · 39cd6d5 · 39cd6d5
1 parent 77c8ee0
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diff --git a/pandas/tests/frame/test_to_csv.py b/pandas/tests/frame/test_to_csv.py
@@ -575,12 +575,6 @@ def test_to_csv_headers(self):
             recons.reset_index(inplace=True)
             tm.assert_frame_equal(to_df, recons)
 
-    def test_read_csv_raises_on_header_prefix(self):
-        # gh-27394
-        msg = "Argument prefix must be None if argument header is not None"
-        s = StringIO("0,1\n2,3")
-        with pytest.raises(ValueError, match=msg):
-            read_csv(s, header=0, prefix="_X")
 
     def test_to_csv_multiindex(self, float_frame, datetime_frame):
 

diff --git a/pandas/tests/io/parser/test_common.py b/pandas/tests/io/parser/test_common.py
@@ -25,7 +25,6 @@
     concat,
     read_csv,
 )
-
 import pandas._testing as tm
 
 from pandas.io.parsers import CParserWrapper, TextFileReader, TextParser