diff --git a/pyproject.toml b/pyproject.toml
index a8f9258..0712e1d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ pytest-cov = "^4.1.0"
 enable = true
 
 [tool.pytest.ini_options]
-addopts = "--capture=no --cov --cov-report term --cov-report xml"
+addopts = "--capture=no"
 
 [tool.ruff]
 line-length = 88
diff --git a/pytest_ruff.py b/pytest_ruff.py
index c78900e..ffa8456 100644
--- a/pytest_ruff.py
+++ b/pytest_ruff.py
@@ -65,6 +65,7 @@ def collect(self):
             collection.append(RuffFormatItem.from_parent(self, name="ruff::format"))
         return [Item.from_parent(self, name=Item.name) for Item in collection]
 
+
 def check_file(path):
     ruff = find_ruff_bin()
     command = [ruff, "check", path, "--quiet", "--show-source", "--force-exclude"]
diff --git a/tox.ini b/tox.ini
index 8e06f37..f16d762 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,20 +1,21 @@
 [tox]
 isolated_build = true
-envlist = py{38,39,310,311,312}
+envlist = py{38,39,310,311,312},lint
 
 [testenv]
 allowlist_externals = poetry
 commands =
     poetry install --no-root --with dev
-    poetry run pytest -vvv {posargs}
+    # Disable ruff plugin to generate better coverage results
+    poetry run pytest -p no:ruff -vvv --cov --cov-append --cov-report term --cov-report xml {posargs}
 
 [testenv:lint]
 description = lint source code
 deps =
     ruff
 commands =
-    ruff check .
-    ruff format .
+    ruff check --extend-exclude=tests/assets/ .
+    ruff format --check --exclude=tests/assets/ .
 
 [gh-actions]
 python =
@@ -22,4 +23,4 @@ python =
     3.9: py39
     3.10: py310
     3.11: py311
-    3.12: py312
+    3.12: py312,lint