diff --git a/pandas/tests/io/excel/test_odf.py b/pandas/tests/io/excel/test_odf.py
index b5bb9b27258d8..f01827fa4ca2f 100644
--- a/pandas/tests/io/excel/test_odf.py
+++ b/pandas/tests/io/excel/test_odf.py
@@ -3,16 +3,11 @@
 import numpy as np
 import pytest
 
-from pandas.compat import is_platform_windows
-
 import pandas as pd
 import pandas._testing as tm
 
 pytest.importorskip("odf")
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 @pytest.fixture(autouse=True)
 def cd_and_set_engine(monkeypatch, datapath):
diff --git a/pandas/tests/io/excel/test_odswriter.py b/pandas/tests/io/excel/test_odswriter.py
index 1c728ad801bc1..271353a173d2a 100644
--- a/pandas/tests/io/excel/test_odswriter.py
+++ b/pandas/tests/io/excel/test_odswriter.py
@@ -6,8 +6,6 @@
 
 import pytest
 
-from pandas.compat import is_platform_windows
-
 import pandas as pd
 import pandas._testing as tm
 
@@ -15,9 +13,6 @@
 
 odf = pytest.importorskip("odf")
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 @pytest.fixture
 def ext():
diff --git a/pandas/tests/io/excel/test_openpyxl.py b/pandas/tests/io/excel/test_openpyxl.py
index 952026b2a50d3..c20c6daf92931 100644
--- a/pandas/tests/io/excel/test_openpyxl.py
+++ b/pandas/tests/io/excel/test_openpyxl.py
@@ -5,8 +5,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import is_platform_windows
-
 import pandas as pd
 from pandas import DataFrame
 import pandas._testing as tm
@@ -19,9 +17,6 @@
 
 openpyxl = pytest.importorskip("openpyxl")
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 @pytest.fixture
 def ext():
diff --git a/pandas/tests/io/excel/test_readers.py b/pandas/tests/io/excel/test_readers.py
index 2cf17913ba6e4..e4a8791396ee2 100644
--- a/pandas/tests/io/excel/test_readers.py
+++ b/pandas/tests/io/excel/test_readers.py
@@ -18,7 +18,6 @@
 
 from pandas._config import using_pyarrow_string_dtype
 
-from pandas.compat import is_platform_windows
 import pandas.util._test_decorators as td
 
 import pandas as pd
@@ -35,9 +34,6 @@
     StringArray,
 )
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 read_ext_params = [".xls", ".xlsx", ".xlsm", ".xlsb", ".ods"]
 engine_params = [
     # Add any engines to test here
diff --git a/pandas/tests/io/excel/test_style.py b/pandas/tests/io/excel/test_style.py
index e801d1c647ed1..58b297e4520bb 100644
--- a/pandas/tests/io/excel/test_style.py
+++ b/pandas/tests/io/excel/test_style.py
@@ -4,7 +4,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import is_platform_windows
 import pandas.util._test_decorators as td
 
 from pandas import (
@@ -21,9 +20,6 @@
 # could compute styles and render to excel without jinja2, since there is no
 # 'template' file, but this needs the import error to delayed until render time.
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 def assert_equal_cell_styles(cell1, cell2):
     # TODO: should find a better way to check equality
diff --git a/pandas/tests/io/excel/test_writers.py b/pandas/tests/io/excel/test_writers.py
index 7d958d2d35920..3352164b2f980 100644
--- a/pandas/tests/io/excel/test_writers.py
+++ b/pandas/tests/io/excel/test_writers.py
@@ -11,7 +11,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import is_platform_windows
 from pandas.compat._constants import PY310
 from pandas.compat._optional import import_optional_dependency
 import pandas.util._test_decorators as td
@@ -35,9 +34,6 @@
 )
 from pandas.io.excel._util import _writers
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 def get_exp_unit(path: str) -> str:
     return "ns"
diff --git a/pandas/tests/io/excel/test_xlrd.py b/pandas/tests/io/excel/test_xlrd.py
index edabbad93acbc..c49cbaf7fb26c 100644
--- a/pandas/tests/io/excel/test_xlrd.py
+++ b/pandas/tests/io/excel/test_xlrd.py
@@ -3,8 +3,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import is_platform_windows
-
 import pandas as pd
 import pandas._testing as tm
 
@@ -13,9 +11,6 @@
 
 xlrd = pytest.importorskip("xlrd")
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 @pytest.fixture
 def read_ext_xlrd():
diff --git a/pandas/tests/io/excel/test_xlsxwriter.py b/pandas/tests/io/excel/test_xlsxwriter.py
index 529367761fc02..94f6bdfaf069c 100644
--- a/pandas/tests/io/excel/test_xlsxwriter.py
+++ b/pandas/tests/io/excel/test_xlsxwriter.py
@@ -2,8 +2,6 @@
 
 import pytest
 
-from pandas.compat import is_platform_windows
-
 from pandas import DataFrame
 import pandas._testing as tm
 
@@ -11,9 +9,6 @@
 
 xlsxwriter = pytest.importorskip("xlsxwriter")
 
-if is_platform_windows():
-    pytestmark = pytest.mark.single_cpu
-
 
 @pytest.fixture
 def ext():