diff --git a/pyproject.toml b/pyproject.toml
index 22e28f8f6f68..0b14dd419d08 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,3 +79,47 @@ extra-standard-library = ["typing_extensions"]
 
 [tool.check-manifest]
 ignore = ["**/.readthedocs.yaml"]
+
+[tool.pytest.ini_options]
+minversion = "6.0.0"
+testpaths = ["mypy/test", "mypyc/test"]
+python_files = 'test*.py'
+
+# Where do the test cases come from?  We provide our own collection
+# logic by implementing `pytest_pycollect_makeitem` in mypy.test.data;
+# the test files import that module, and pytest sees the magic name
+# and invokes it at the relevant moment.  See
+# https://doc.pytest.org/en/latest/how-to/writing_plugins.html#collection-hooks
+
+# Both our plugin and unittest provide their own collection logic,
+# So we can disable the default python collector by giving it empty
+# patterns to search for.
+# Note that unittest requires that no "Test*" classes exist.
+python_classes = []
+python_functions = []
+
+# always run in parallel (requires pytest-xdist, see test-requirements.txt)
+# and enable strict mode: require all markers
+# to be defined and raise on invalid config values
+addopts = "-nauto --strict-markers --strict-config"
+
+# treat xpasses as test failures so they get converted to regular tests as soon as possible
+xfail_strict = true
+
+[tool.coverage.run]
+branch = true
+source = "mypy"
+parallel = true
+
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+omit = 'mypy/test/*'
+exclude_lines = [
+  '\#\s*pragma: no cover',
+  '^\s*raise AssertionError\b',
+  '^\s*raise NotImplementedError\b',
+  '^\s*return NotImplemented\b',
+  '^\s*raise$',
+  '''^if __name__ == ['"]__main__['"]:$''',
+]
diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index a123b0f11328..000000000000
--- a/pytest.ini
+++ /dev/null
@@ -1,27 +0,0 @@
-[pytest]
-minversion = 6.0.0
-
-testpaths = mypy/test mypyc/test
-
-python_files = test*.py
-
-# Where do the test cases come from?  We provide our own collection
-# logic by implementing `pytest_pycollect_makeitem` in mypy.test.data;
-# the test files import that module, and pytest sees the magic name
-# and invokes it at the relevant moment.  See
-# https://doc.pytest.org/en/latest/how-to/writing_plugins.html#collection-hooks
-
-# Both our plugin and unittest provide their own collection logic,
-# So we can disable the default python collector by giving it empty
-# patterns to search for.
-# Note that unittest requires that no "Test*" classes exist.
-python_classes =
-python_functions =
-
-# always run in parallel (requires pytest-xdist, see test-requirements.txt)
-# and enable strict mode: require all markers
-# to be defined and raise on invalid config values
-addopts = -nauto --strict-markers --strict-config
-
-# treat xpasses as test failures so they get converted to regular tests as soon as possible
-xfail_strict = true
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 04d75ac8d19f..000000000000
--- a/setup.cfg
+++ /dev/null
@@ -1,16 +0,0 @@
-[coverage:run]
-branch = true
-source = mypy
-parallel = true
-
-[coverage:report]
-show_missing = true
-skip_covered = True
-omit = mypy/test/*
-exclude_lines =
-    \#\s*pragma: no cover
-    ^\s*raise AssertionError\b
-    ^\s*raise NotImplementedError\b
-    ^\s*return NotImplemented\b
-    ^\s*raise$
-    ^if __name__ == ['"]__main__['"]:$