diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1abfbcf..a2c1b87 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -31,6 +31,11 @@ jobs:
           pkg-manager: pip
           # app-dir: ~/project/package-directory/  # If your requirements.txt isn't in the root directory.
           # pip-dependency-file: test-requirements.txt  # if you have a different name for your requirements file, maybe one that combines your runtime and test requirements.
+      - run:
+          name: Check formatting
+          command: |
+            pip install yapf
+            yapf -d -r -e '.cci_pycache/**' .
       - run:
           name: Run tests
           # This assumes pytest is installed via the install-package step above