--- a/contrib/heptapod-ci.yml	Wed Jan 27 15:53:32 2021 +0100
+++ b/contrib/heptapod-ci.yml	Wed Jan 27 14:57:20 2021 +0100
@@ -20,6 +20,7 @@
       - cargo build
       - cd /tmp/mercurial-ci/
       - ls -1 tests/test-check-*.* > /tmp/check-tests.txt
+      - black --version
     script:
         - echo "python used, $PYTHON"
         - echo "$RUNTEST_ARGS"