setup.py

--- a/setup.py	Tue Sep 18 15:32:11 2018 -0700
+++ b/setup.py	Tue Sep 18 16:52:11 2018 -0700
@@ -822,6 +822,7 @@
             'mercurial.thirdparty.zope.interface',
             'mercurial.utils',
             'mercurial.revlogutils',
+            'mercurial.testing',
             'hgext', 'hgext.convert', 'hgext.fsmonitor',
             'hgext.fastannotate',
             'hgext.fsmonitor.pywatchman',