diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 7eae93a6a27e9..31ed5096991a6 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -173,8 +173,8 @@ jobs:
           pip install hypothesis>=6.34.2 pytest>=7.0.0 pytest-xdist>=2.2.0 pytest-asyncio>=0.17
           cd .. # Not a good idea to test within the src tree
           python -c "import pandas; print(pandas.__version__);
-          pandas.test(extra_args=['-m not clipboard and not single_cpu and not slow and not network and not db', '-n 2', '--no-strict-data-files']);
-          pandas.test(extra_args=['-m not clipboard and single_cpu and not slow and not network and not db', '--no-strict-data-files'])"
+          pandas.test(extra_args=['-m not clipboard and not single_cpu and not slow and not network and not db', '-n 2']);
+          pandas.test(extra_args=['-m not clipboard and single_cpu and not slow and not network and not db'])"
       - uses: actions/upload-artifact@v3
         with:
           name: sdist
diff --git a/ci/test_wheels.py b/ci/test_wheels.py
index d6f843d7b2c68..f861c1cbedcad 100644
--- a/ci/test_wheels.py
+++ b/ci/test_wheels.py
@@ -41,12 +41,10 @@
     multi_args = [
         "-m not clipboard and not single_cpu and not slow and not network and not db",
         "-n 2",
-        "--no-strict-data-files",
     ]
     pd.test(extra_args=multi_args)
     pd.test(
         extra_args=[
             "-m not clipboard and single_cpu and not slow and not network and not db",
-            "--no-strict-data-files",
         ]
     )
diff --git a/ci/test_wheels_windows.bat b/ci/test_wheels_windows.bat
index b8724d6d31cb5..6364169e53924 100644
--- a/ci/test_wheels_windows.bat
+++ b/ci/test_wheels_windows.bat
@@ -1,6 +1,6 @@
 set test_command=import pandas as pd; print(pd.__version__); ^
-pd.test(extra_args=['-m not clipboard and not single_cpu and not slow and not network and not db', '--no-strict-data-files', '-n=2']); ^
-pd.test(extra_args=['-m not clipboard and single_cpu and not slow and not network and not db', '--no-strict-data-files'])
+pd.test(extra_args=['-m not clipboard and not single_cpu and not slow and not network and not db', '-n 2']); ^
+pd.test(extra_args=['-m not clipboard and single_cpu and not slow and not network and not db'])
 
 python --version
 pip install pytz six numpy python-dateutil tzdata>=2022.1
diff --git a/pandas/conftest.py b/pandas/conftest.py
index 68f3c575ee93d..95bb2078d151c 100644
--- a/pandas/conftest.py
+++ b/pandas/conftest.py
@@ -103,9 +103,9 @@
 
 def pytest_addoption(parser) -> None:
     parser.addoption(
-        "--no-strict-data-files",
-        action="store_false",
-        help="Don't fail if a test is skipped for missing data file.",
+        "--strict-data-files",
+        action="store_true",
+        help="Fail if a test is skipped for missing data file.",
     )
 
 
@@ -1112,9 +1112,9 @@ def all_numeric_accumulations(request):
 @pytest.fixture
 def strict_data_files(pytestconfig):
     """
-    Returns the configuration for the test setting `--no-strict-data-files`.
+    Returns the configuration for the test setting `--strict-data-files`.
     """
-    return pytestconfig.getoption("--no-strict-data-files")
+    return pytestconfig.getoption("--strict-data-files")
 
 
 @pytest.fixture
@@ -1134,7 +1134,7 @@ def datapath(strict_data_files: str) -> Callable[..., str]:
     Raises
     ------
     ValueError
-        If the path doesn't exist and the --no-strict-data-files option is not set.
+        If the path doesn't exist and the --strict-data-files option is set.
     """
     BASE_PATH = os.path.join(os.path.dirname(__file__), "tests")
 
@@ -1143,7 +1143,7 @@ def deco(*args):
         if not os.path.exists(path):
             if strict_data_files:
                 raise ValueError(
-                    f"Could not find file {path} and --no-strict-data-files is not set."
+                    f"Could not find file {path} and --strict-data-files is set."
                 )
             pytest.skip(f"Could not find {path}.")
         return path
diff --git a/pandas/tests/test_common.py b/pandas/tests/test_common.py
index 15fa10b9e4289..d31f617b9be15 100644
--- a/pandas/tests/test_common.py
+++ b/pandas/tests/test_common.py
@@ -1,6 +1,5 @@
 import collections
 from functools import partial
-import os
 import string
 
 import numpy as np
@@ -175,12 +174,6 @@ def test_version_tag():
         )
 
 
-def test_pyproject_present():
-    # Check pyproject.toml is present(relevant for wheels)
-    pyproject_loc = os.path.join(os.path.dirname(__file__), "../../pyproject.toml")
-    assert os.path.exists(pyproject_loc)
-
-
 @pytest.mark.parametrize(
     "obj", [(obj,) for obj in pd.__dict__.values() if callable(obj)]
 )
diff --git a/pyproject.toml b/pyproject.toml
index 1bc530df74e87..04c87e3d10a86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -125,9 +125,6 @@ include-package-data = true
 include = ["pandas", "pandas.*"]
 namespaces = false
 
-[tool.setuptools.package-data]
-pandas = ["../pyproject.toml"]
-
 [tool.setuptools.exclude-package-data]
 "*" = ["*.c", "*.h"]
 
@@ -409,7 +406,7 @@ disable = [
 [tool.pytest.ini_options]
 # sync minversion with pyproject.toml & install.rst
 minversion = "7.0"
-addopts = "--strict-markers --strict-config --capture=no --durations=30 --junitxml=test-data.xml"
+addopts = "--strict-data-files --strict-markers --strict-config --capture=no --durations=30 --junitxml=test-data.xml"
 empty_parameter_set_mark = "fail_at_collect"
 xfail_strict = true
 testpaths = "pandas"
@@ -419,7 +416,6 @@ doctest_optionflags = [
   "ELLIPSIS",
 ]
 filterwarnings = [
-  "error::_pytest.warning_types.PytestUnknownMarkWarning",
   "error:::pandas",
   "error::ResourceWarning",
   "error::pytest.PytestUnraisableExceptionWarning",