diff --git a/.github/workflows/python-relattrs-ci.yml b/.github/workflows/python-relattrs-ci.yml
index 08a5edf..170f5d3 100644
--- a/.github/workflows/python-relattrs-ci.yml
+++ b/.github/workflows/python-relattrs-ci.yml
@@ -20,6 +20,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v5
+
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
@@ -30,9 +31,8 @@ jobs:
           python -m pip install --upgrade pip
           pip install .[dev]
 
-      - name: Test with pytest and coverage
-        run: |
-          pytest --cov --cov-report=xml
+      - name: Run tox
+        run: tox -q -e py$(echo ${{ matrix.python-version }} | tr -d .)
 
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v5
diff --git a/.gitignore b/.gitignore
index 5fc5d5f..6f5dda1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,10 @@
 # tox test environment
 /.tox
 
+# coverage reports
+coverage.xml
+.coverage
+
 # Setuptools distribution folder
 /dist
 
diff --git a/pyproject.toml b/pyproject.toml
index 340f8d3..bb53bef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,14 +53,13 @@ pythonpath = [".", "relattrs"]
 filterwarnings = ["ignore::DeprecationWarning"]
 
 [tool.tox]
-legacy_tox_ini = """
-[tox]
-env_list = py{314,313,312,311,310,39,38}
+envlist = ["py38", "py39", "py310", "py311", "py312", "py313", "py314"]
 
-[testenv]
-deps = pytest
-commands = pytest -q
-"""
+[tool.tox.env_run_base]
+deps = ["pytest", "pytest-cov"]
+commands = [
+    ["pytest", "-q", "--cov", "--cov-report=xml"]
+]
 
 [tool.ruff]
 line-length = 88