diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d61724..b053fb4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v5
     - uses: codespell-project/actions-codespell@v2
     - uses: astral-sh/ruff-action@v3
-    - run: ruff format --check --diff --config='format.quote-style="preserve"'
+    - run: ruff format --check --diff
 
   pytest:
     needs: codespell_and_ruff
diff --git a/README.md b/README.md
index dcbab9c..bc52fef 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Mock.GPIO
 
+[![CircleCI](https://circleci.com/gh/codenio/Mock.GPIO.svg?style=svg)](https://circleci.com/gh/codenio/Mock.GPIO)
+
 Mock Library for RPi.GPIO.
 
 Mock.GPIO helps you develop and debug GPIO-dependent code outside a Raspberry Pi (e.g. on macOS/Linux) while keeping the same API as `RPi.GPIO`. It prints intended actions when running off-device and works as a drop-in replacement on-device without code changes.