diff --git a/.github/workflows/examples.yaml b/.github/workflows/examples.yaml
index 5c91fc7e..23598657 100644
--- a/.github/workflows/examples.yaml
+++ b/.github/workflows/examples.yaml
@@ -35,11 +35,10 @@ jobs:
           key: readme-${{ hashFiles('pyproject.toml') }}
 
       - name: Install dependencies
-        run: python -m pip install -e ".[readme]"
+        run: python -m pip install -e '.[readme]'
 
       - name: Run examples in the README
-        run: >-
-          python -m pytest --codeblocks .github README.md documentation -n auto
+        run: python -m pytest --codeblocks .github README.md documentation
 
   examples:
     runs-on: ubuntu-latest
diff --git a/pyproject.toml b/pyproject.toml
index 34a18f7d..fe76f554 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,6 @@ optional-dependencies = {dev = [
     "pdoc3",
 ], readme = [
     "pytest-codeblocks",
-    "pytest-xdist",
 ]}
 readme = "README.md"
 requires-python = ">=3.11"
@@ -206,21 +205,27 @@ write_to = "src/sleplet/_version.py"
 overrides."project.classifiers".inline_arrays = false
 overrides."tool.coverage.paths.source".inline_arrays = false
 overrides."tool.ruff.lint.isort.section-order".inline_arrays = false
+overrides."tool.tox.env_run_base.commands".inline_arrays = false
 
 [tool.tox]
-legacy_tox_ini = """
-    [gh]
-    python =
-        3.11: py311
-        3.12: py312
-        3.13: py313
-
-    [testenv]
-    commands =
-        pytest --cov --cov-report=lcov
-    deps =
-        pytest-cov
-
-    [tox]
-    env_list = py{311,312}
-"""
+env_list = [
+    "py311",
+    "py312",
+    "py313",
+]
+env_run_base = {commands = [
+    [
+        "pytest",
+        "--cov",
+        "--cov-report=lcov",
+    ],
+], deps = [
+    "pytest-cov",
+]}
+gh.python = {"3.11" = [
+    "py311",
+], "3.12" = [
+    "py312",
+], "3.13" = [
+    "py313",
+]}