diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 575d787..0414f18 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,14 +17,6 @@ repos:
   rev: 1.2.0
   hooks:
   - id: pyproject-fmt
-- repo: https://github.com/asottile/setup-cfg-fmt
-  rev: v2.5.0
-  hooks:
-  - id: setup-cfg-fmt
-    args:
-    - --include-version-classifiers
-    - --max-py-version
-    - '3.12'
 - repo: https://github.com/tox-dev/tox-ini-fmt
   rev: 1.3.1
   hooks:
@@ -68,7 +60,6 @@ repos:
     - flake8-bugbear
     - flake8-comprehensions
     - flake8-tidy-imports
-    - flake8-typing-imports
 - repo: https://github.com/pre-commit/mirrors-mypy
   rev: v1.6.1
   hooks:
diff --git a/pyproject.toml b/pyproject.toml
index 74a500d..adf5400 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,6 +4,38 @@ requires = [
   "setuptools",
 ]
 
+[project]
+name = "pytest-is-running"
+version = "1.5.0"
+description = "pytest plugin providing a function to check if pytest is running."
+readme = {file = "README.rst", content-type = "text/x-rst"}
+keywords = [
+  "pytest",
+]
+license = {text = "MIT"}
+authors = [{name = "Adam Johnson", email = "me@adamj.eu"}]
+requires-python = ">=3.8"
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Framework :: Pytest",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Natural Language :: English",
+  "Programming Language :: Python :: 3 :: Only",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Typing :: Typed",
+]
+[project.urls]
+Changelog = "https://github.com/adamchainz/pytest-is-running/blob/main/CHANGELOG.rst"
+Funding = "https://adamj.eu/books/"
+Repository = "https://github.com/adamchainz/pytest-is-running"
+[project.entry-points.pytest11]
+is_running = "pytest_is_running.plugin"
+
 [tool.black]
 target-version = ['py38']
 
@@ -13,6 +45,23 @@ addopts = """\
     --strict-markers
     """
 
+[tool.coverage.run]
+branch = true
+parallel = true
+source = [
+    "pytest_is_running",
+    "tests",
+]
+
+[tool.coverage.paths]
+source = [
+    "src",
+    ".tox/**/site-packages",
+]
+
+[tool.coverage.report]
+show_missing = true
+
 [tool.mypy]
 mypy_path = "src/"
 namespace_packages = false
diff --git a/requirements/py310.txt b/requirements/py310.txt
index 4f5e630..a3b1d5b 100644
--- a/requirements/py310.txt
+++ b/requirements/py310.txt
@@ -4,7 +4,7 @@
 #
 #    requirements/compile.py
 #
-coverage==7.3.2 \
+coverage[toml]==7.3.2 \
     --hash=sha256:0cbf38419fb1a347aaf63481c00f0bdc86889d9fbf3f25109cf96c26b403fda1 \
     --hash=sha256:12d15ab5833a997716d76f2ac1e4b4d536814fc213c85ca72756c19e5a6b3d63 \
     --hash=sha256:149de1d2401ae4655c436a3dced6dd153f4c3309f599c3d4bd97ab172eaf02d9 \
@@ -87,4 +87,6 @@ pytest-randomly==3.15.0 \
 tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
-    # via pytest
+    # via
+    #   coverage
+    #   pytest
diff --git a/requirements/py311.txt b/requirements/py311.txt
index e7c1b8b..e480599 100644
--- a/requirements/py311.txt
+++ b/requirements/py311.txt
@@ -4,7 +4,7 @@
 #
 #    requirements/compile.py
 #
-coverage==7.3.2 \
+coverage[toml]==7.3.2 \
     --hash=sha256:0cbf38419fb1a347aaf63481c00f0bdc86889d9fbf3f25109cf96c26b403fda1 \
     --hash=sha256:12d15ab5833a997716d76f2ac1e4b4d536814fc213c85ca72756c19e5a6b3d63 \
     --hash=sha256:149de1d2401ae4655c436a3dced6dd153f4c3309f599c3d4bd97ab172eaf02d9 \
diff --git a/requirements/py312.txt b/requirements/py312.txt
index 19a1d29..fe28d11 100644
--- a/requirements/py312.txt
+++ b/requirements/py312.txt
@@ -4,7 +4,7 @@
 #
 #    requirements/compile.py
 #
-coverage==7.3.2 \
+coverage[toml]==7.3.2 \
     --hash=sha256:0cbf38419fb1a347aaf63481c00f0bdc86889d9fbf3f25109cf96c26b403fda1 \
     --hash=sha256:12d15ab5833a997716d76f2ac1e4b4d536814fc213c85ca72756c19e5a6b3d63 \
     --hash=sha256:149de1d2401ae4655c436a3dced6dd153f4c3309f599c3d4bd97ab172eaf02d9 \
diff --git a/requirements/py38.txt b/requirements/py38.txt
index 47e6d01..6d7010b 100644
--- a/requirements/py38.txt
+++ b/requirements/py38.txt
@@ -4,7 +4,7 @@
 #
 #    requirements/compile.py
 #
-coverage==7.3.2 \
+coverage[toml]==7.3.2 \
     --hash=sha256:0cbf38419fb1a347aaf63481c00f0bdc86889d9fbf3f25109cf96c26b403fda1 \
     --hash=sha256:12d15ab5833a997716d76f2ac1e4b4d536814fc213c85ca72756c19e5a6b3d63 \
     --hash=sha256:149de1d2401ae4655c436a3dced6dd153f4c3309f599c3d4bd97ab172eaf02d9 \
@@ -91,7 +91,9 @@ pytest-randomly==3.15.0 \
 tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
-    # via pytest
+    # via
+    #   coverage
+    #   pytest
 zipp==3.17.0 \
     --hash=sha256:0e923e726174922dce09c53c59ad483ff7bbb8e572e00c7f7c46b88556409f31 \
     --hash=sha256:84e64a1c28cf7e91ed2078bb8cc8c259cb19b76942096c8d7b84947690cabaf0
diff --git a/requirements/py39.txt b/requirements/py39.txt
index 82e737e..1d5a7d2 100644
--- a/requirements/py39.txt
+++ b/requirements/py39.txt
@@ -4,7 +4,7 @@
 #
 #    requirements/compile.py
 #
-coverage==7.3.2 \
+coverage[toml]==7.3.2 \
     --hash=sha256:0cbf38419fb1a347aaf63481c00f0bdc86889d9fbf3f25109cf96c26b403fda1 \
     --hash=sha256:12d15ab5833a997716d76f2ac1e4b4d536814fc213c85ca72756c19e5a6b3d63 \
     --hash=sha256:149de1d2401ae4655c436a3dced6dd153f4c3309f599c3d4bd97ab172eaf02d9 \
@@ -91,7 +91,9 @@ pytest-randomly==3.15.0 \
 tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
-    # via pytest
+    # via
+    #   coverage
+    #   pytest
 zipp==3.17.0 \
     --hash=sha256:0e923e726174922dce09c53c59ad483ff7bbb8e572e00c7f7c46b88556409f31 \
     --hash=sha256:84e64a1c28cf7e91ed2078bb8cc8c259cb19b76942096c8d7b84947690cabaf0
diff --git a/requirements/requirements.in b/requirements/requirements.in
index efe5d3d..59d5434 100644
--- a/requirements/requirements.in
+++ b/requirements/requirements.in
@@ -1,3 +1,3 @@
-coverage
+coverage[toml]
 pytest
 pytest-randomly
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 7fdca8d..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,66 +0,0 @@
-[metadata]
-name = pytest_is_running
-version = 1.5.0
-description = pytest plugin providing a function to check if pytest is running.
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-url = https://github.com/adamchainz/pytest-is-running
-author = Adam Johnson
-author_email = me@adamj.eu
-license = MIT
-license_files = LICENSE
-classifiers =
-    Development Status :: 5 - Production/Stable
-    Framework :: Pytest
-    Intended Audience :: Developers
-    License :: OSI Approved :: MIT License
-    Natural Language :: English
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Programming Language :: Python :: 3.12
-    Typing :: Typed
-keywords = pytest
-project_urls =
-    Changelog = https://github.com/adamchainz/pytest-is-running/blob/main/CHANGELOG.rst
-    Funding = https://adamj.eu/books/
-    Mastodon = https://fosstodon.org/@adamchainz
-    Twitter = https://twitter.com/adamchainz
-
-[options]
-packages = find:
-python_requires = >=3.8
-include_package_data = True
-package_dir =
-    =src
-zip_safe = False
-
-[options.packages.find]
-where = src
-
-[options.entry_points]
-pytest11 =
-    is_running = pytest_is_running.plugin
-
-[coverage:run]
-branch = True
-disable_warnings = no-data-collected  # coverage only in subprocesses
-parallel = True
-source =
-    pytest_is_running
-    tests
-
-[coverage:paths]
-source =
-    src/
-    .tox/**/site-packages
-
-[coverage:report]
-show_missing = True
-
-[flake8]
-max-line-length = 88
-extend-ignore = E203
diff --git a/tests/test_pytest_is_running.py b/tests/test_pytest_is_running.py
index 6f3911b..e91119f 100644
--- a/tests/test_pytest_is_running.py
+++ b/tests/test_pytest_is_running.py
@@ -26,12 +26,12 @@ def our_tmp_path(tmp_path):
     yield tmp_path
 
 
-SETUP_CFG_PATH = Path(__file__).resolve().parent.parent / "setup.cfg"
+PYPROJECT_PATH = Path(__file__).resolve().parent.parent / "pyproject.toml"
 
 
 def run_and_check(command: list[str], cwd: Path) -> None:
     env = dict(
-        os.environ, PYTHONPATH=str(cwd), COVERAGE_PROCESS_START=str(SETUP_CFG_PATH)
+        os.environ, PYTHONPATH=str(cwd), COVERAGE_PROCESS_START=str(PYPROJECT_PATH)
     )
     subprocess.run(
         [sys.executable] + command,
diff --git a/tox.ini b/tox.ini
index b05b9ed..003b4cd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,3 +17,7 @@ commands =
       -W error::PendingDeprecationWarning \
       -m coverage run \
       -m pytest -p no:is_running {posargs:tests}
+
+[flake8]
+max-line-length = 88
+extend-ignore = E203