--- a/testing/hghave.py
+++ b/testing/hghave.py
@@ -40,16 +40,17 @@ def has_docker():
     tf = tempfile.NamedTemporaryFile()
     tf.close()
     d = Docker(tf.name, url, tls=tls)
     return d.is_alive()
 
 def hgversion():
     v = os.environ['HGVERSION']
     v = v.split('+')[0]
+    v = v.split('-')[0]
     return tuple(int(i) for i in v.split('.'))
 
 @check('hg30+', 'Running with Mercurial 3.0+')
 def has_hg_30_plus():
     return hgversion()[0] >= 3
 
 @check('hg31+', 'Running with Mercurial 3.1+')
 def has_hg_31_plus():