diff -r 2f314599d5a2 -r b21e3a747501 tests/test-check-format.t
--- a/tests/test-check-format.t	Wed Oct 16 15:27:17 2019 +0200
+++ b/tests/test-check-format.t	Tue Oct 15 09:48:27 2019 -0400
@@ -3,5 +3,5 @@
 (this should use the actual black as soon as possible)
 
   $ cd $RUNTESTDIR/..
-  $ python3 contrib/grey.py -S --quiet --check --diff `hg files 'set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**" - contrib/grey.py'`
+  $ python3 contrib/grey.py --config=black.toml --check --diff `hg files 'set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**" - contrib/grey.py'`