diff --git a/pyproject.toml b/pyproject.toml
index 2380ed8cf9e..747f926771a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -160,3 +160,6 @@ max-args=10
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = "--verbose --durations=0 --durations-min=0.2 --doctest-modules --mpl --mpl-results-path=results"
+markers = [
+    "benchmark: mark a test with custom benchmark settings.",
+]