Fix test

Author: luke396

pandas/tests/io/excel/test_writers.py

@@ -1397,6 +1397,13 @@ def test_to_excel_empty_frame(self, engine, ext):
             expected = DataFrame()
             tm.assert_frame_equal(result, expected)
 
+    def test_to_excel_raising_warning_when_cell_character_exceed_limit(self, path):
+        # GH#56954
+        df = DataFrame({"A": ["a" * 32768]})
+        msg = "String value too long, truncated to 32767 characters"
+        with tm.assert_produces_warning(UserWarning, match=msg):
+            df.to_excel(path)
+
 
 class TestExcelWriterEngineTests:
     @pytest.mark.parametrize(
@@ -1505,12 +1512,3 @@ def test_subclass_attr(klass):
     attrs_base = {name for name in dir(ExcelWriter) if not name.startswith("_")}
     attrs_klass = {name for name in dir(klass) if not name.startswith("_")}
     assert not attrs_base.symmetric_difference(attrs_klass)
-
-
-def test_to_excel_raising_warning_when_cell_character_exceed_limit():
-    # GH#56954
-    df = DataFrame({"A": ["a" * 32768]})
-    msg = "String value too long, truncated to 32767 characters"
-    with tm.assert_produces_warning(UserWarning, match=msg):
-        buf = BytesIO()
-        df.to_excel(buf)