diff --git a/pyproject.toml b/pyproject.toml
index 8305027e..d1cb8e61 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ coverage = "^7.2.0"
 black = "23.9.1"
 blackdoc = "0.3.8"
 mypy = "^1.2.0"
-ruff = "0.0.288"
+ruff = "0.1.1"
 pre-commit = "^3.3.1"
 towncrier = "^23.6.0"
 liccheck = "^0.9.1"
diff --git a/tests/unit/test_groupby.py b/tests/unit/test_groupby.py
index 99dbb1a9..2fdc6889 100644
--- a/tests/unit/test_groupby.py
+++ b/tests/unit/test_groupby.py
@@ -2,7 +2,6 @@
 import pytest
 
 from scmdata import ScmRun
-from scmdata.groupby import get_joblib_parallel_processor
 from scmdata.testing import assert_scmdf_almost_equal
 
 group_tests = pytest.mark.parametrize(