diff -r c6a3243567b6 -r 127d33e63d1a tests/hghave.py
--- a/tests/hghave.py	Thu Jun 02 23:57:56 2022 +0200
+++ b/tests/hghave.py	Wed Jun 08 15:46:04 2022 +0200
@@ -1121,7 +1121,7 @@
 @check('black', 'the black formatter for python (>= 20.8b1)')
 def has_black():
     blackcmd = 'black --version'
-    version_regex = b'black, version ([0-9a-b.]+)'
+    version_regex = b'black, (?:version )?([0-9a-b.]+)'
     version = matchoutput(blackcmd, version_regex)
     sv = distutils.version.StrictVersion
     return version and sv(_bytes2sys(version.group(1))) >= sv('20.8b1')