diff --git a/build.sh b/build.sh
index 00c9b5e..39a6898 100755
--- a/build.sh
+++ b/build.sh
@@ -42,6 +42,7 @@ install_build_style() {
 
 run_build_style() {
     flake8 vdirsyncer tests
+    ! git grep -i syncroniz
 }
 
 install_build_docs() {