[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

tests/session/cmd/test_depends.py

@@ -50,8 +50,9 @@ def test_depends_wheel(tox_project: ToxProjectCreator, patch_prev_py: Callable[[
     """
     assert outcome.out == dedent(expected).lstrip()
 
+
 def test_depends_sdist(tox_project: ToxProjectCreator, patch_prev_py: Callable[[bool], tuple[str, str]]) -> None:
-    prev_ver, impl = patch_prev_py(True)  # has previous python
+    prev_ver, _impl = patch_prev_py(True)  # has previous python
     ver = sys.version_info[0:2]
     py = f"py{''.join(str(i) for i in ver)}"
     prev_py = f"py{prev_ver}"