diff --git a/.builds/tests-pypi.yml b/.builds/tests-pypi.yml
index eefb33c..5ee2bd9 100644
--- a/.builds/tests-pypi.yml
+++ b/.builds/tests-pypi.yml
@@ -29,6 +29,9 @@ tasks:
       cd vdirsyncer
       make -e ci-test
       make -e ci-test-storage
+  - check: |
+      cd vdirsyncer
+      make check
   - check-secrets: |
       # Stop here if this is a PR. PRs can't run with the below secrets.
       [ -f ~/fastmail-secrets ] || complete-build
diff --git a/Makefile b/Makefile
index 3d60f70..6d1ae6e 100644
--- a/Makefile
+++ b/Makefile
@@ -40,6 +40,11 @@ ci-test-storage:
 	done
 	bash $(CODECOV_PATH) -c
 
+check:
+	ruff check
+	ruff format --diff
+	#mypy vdirsyncer
+
 release-deb:
 	sh scripts/release-deb.sh debian jessie
 	sh scripts/release-deb.sh debian stretch