diff --git a/requirements_test.txt b/requirements_test.txt
index ebd93ea390..7aa8dab534 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 pylint==4.0.6
 flake8==7.3.0  # also change in .pre-commit-config.yaml when updating
-ruff==0.15.20  # also change in .pre-commit-config.yaml when updating
+ruff==0.15.21  # also change in .pre-commit-config.yaml when updating
 pyupgrade==3.21.2  # also change in .pre-commit-config.yaml when updating
 pre-commit