diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5fee7b457..aa73b4d92 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,6 +3,13 @@ name: Tests
 on: [push, pull_request]
 
 jobs:
+  ruff:  # https://beta.ruff.rs
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - run: pip install --user ruff
+    - run: ruff --format=github --line-length=7228 --target-version=py39
+                --ignore=E402,E712,E721,E722,E741,F401,F403,F405,F541,F601,F811,F821,F822,F841 .
   build:
     runs-on: ${{ matrix.os }}
     if: "!contains(github.event.head_commit.message, '[skip ci]')"