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-rw-r--r--test/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/Makefile b/test/Makefile
index b416bc3f5a3..08c6eabe100 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -351,7 +351,7 @@ start-gdb: sanity
.PHONY: checkstyle-python-all
checkstyle-python-all: $(PIP_INSTALL_DONE)
@bash -c "source $(VENV_PATH)/bin/activate &&\
- black -t py39 --diff $(WS_ROOT) ||\
+ black -t py39 --check --diff $(WS_ROOT) ||\
(echo \"*************************************************************************\" &&\
echo \"* Test framework PEP8 compliance check FAILED (maybe: make fixstyle-python)\" &&\
echo \"*************************************************************************\" &&\