change location of the test

Author: rushabh-v

pandas/tests/frame/test_to_csv.py

@@ -575,6 +575,12 @@ def test_to_csv_headers(self):
             recons.reset_index(inplace=True)
             tm.assert_frame_equal(to_df, recons)
 
+    def test_to_csv_raises_on_header_prefix():
+        msg = "Argument prefix must be None if argument header is not None"
+        with pytest.raises(ValueError, match=msg):
+            s = StringIO("0,1\n2,3")
+            read_csv(s, header=0, prefix="_X")
+
     def test_to_csv_multiindex(self, float_frame, datetime_frame):
 
         frame = float_frame

pandas/tests/io/parser/test_header.py

@@ -24,14 +24,6 @@ def test_read_with_bad_header(all_parsers):
         parser.read_csv(s, header=[10])
 
 
-def test_read_raises_on_header_prefix(all_parsers):
-    parser = all_parsers
-    msg = "Argument prefix must be None if argument header is not None"
-    with pytest.raises(ValueError, match=msg):
-        s = StringIO("0,1\n2,3")
-        parser.read_csv(s, header=0, prefix="_X")
-
-
 def test_negative_header(all_parsers):
     # see gh-27779
     parser = all_parsers