diff --git a/.coveragerc b/.coveragerc
deleted file mode 100644
index 92cae43f..00000000
--- a/.coveragerc
+++ /dev/null
@@ -1,10 +0,0 @@
-[run]
-branch = True
-omit =
-    nox/_typing.py
-
-[report]
-exclude_lines =
-    pragma: no cover
-    if _typing.TYPE_CHECKING:
-    @overload
diff --git a/.flake8 b/.flake8
deleted file mode 100644
index aa15c81d..00000000
--- a/.flake8
+++ /dev/null
@@ -1,6 +0,0 @@
-[flake8]
-# Ignore black styles.
-ignore = E501, W503, E203
-# Imports
-import-order-style = google
-application-import-names = nox,tests
diff --git a/.isort.cfg b/.isort.cfg
deleted file mode 100644
index b9fb3f3e..00000000
--- a/.isort.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[settings]
-profile=black
diff --git a/noxfile.py b/noxfile.py
index c269ee79..9ffd7405 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -45,7 +45,7 @@ def tests(session):
         "pytest",
         "--cov=nox",
         "--cov-config",
-        ".coveragerc",
+        "pyproject.toml",
         "--cov-report=",
         *tests,
         env={"COVERAGE_FILE": f".coverage.{session.python}"},
@@ -79,7 +79,7 @@ def cover(session):
     if py_version.major == 3 and py_version.minor == 10:
         fail_under = 99
 
-    session.install("coverage")
+    session.install("coverage[toml]")
     session.run("coverage", "combine")
     session.run("coverage", "report", f"--fail-under={fail_under}", "--show-missing")
     session.run("coverage", "erase")
diff --git a/pyproject.toml b/pyproject.toml
index 90bcd11d..a163ffe9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,6 +5,21 @@ requires = [
 ]
 build-backend = "setuptools.build_meta"
 
+[tool.isort]
+profile = "black"
+
+[tool.coverage.run]
+branch = true
+omit = [
+    "nox/_typing.py",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "if _typing.TYPE_CHECKING:",
+    "@overload",
+]
 
 [tool.mypy]
 files = ["nox"]
diff --git a/setup.cfg b/setup.cfg
index 5d720982..f9f05662 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -59,3 +59,10 @@ tox_to_nox =
 
 [options.package_data]
 nox = py.typed
+
+[flake8]
+# Ignore black styles.
+ignore = E501, W503, E203
+# Imports
+import-order-style = google
+application-import-names = nox,tests