diff --git a/pyproject.toml b/pyproject.toml
index e9ba7e0..2208350 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ classifiers = ["License :: OSI Approved :: GNU General Public License v3 (GPLv3)
 dev = [
   "pytest",
   "pytest-cov",
+  "pytest-xdist",
   "codecov",
   "pre-commit",
   "ruff",