diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 31b5417a..376a49d3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,8 +57,10 @@ jobs:
       if: ${{ matrix.jobtype == 1 }}
       shell: bash
       run: |
-        sbt -v -Dfile.encoding=UTF8 -Dsbt.test.fork=true ++$SCALA212 mimaReportBinaryIssues scalafmtCheckAll headerCheck Test/headerCheck test doc
+        find **/src/main/contraband-scala -name "*.scala" -delete
+        sbt -v -Dfile.encoding=UTF8 -Dsbt.test.fork=true ++$SCALA212 generateContrabands mimaReportBinaryIssues scalafmtCheckAll headerCheck Test/headerCheck test doc
         sbt -v -Dfile.encoding=UTF8 -Dsbt.test.fork=false ++$SCALA213 test ++$SCALA3 test
+        git diff --exit-code # check contrabands
     - name: Build and test (2)
       if: ${{ matrix.jobtype == 2 }}
       shell: bash