--- a/tests/hghave.py	Sat Jul 10 01:57:35 2021 +0200
+++ b/tests/hghave.py	Sat Jul 10 01:58:34 2021 +0200
@@ -191,7 +191,7 @@
 
 @check("chg", "running with chg")
 def has_chg():
-    return 'CHGHG' in os.environ
+    return 'CHG_INSTALLED_AS_HG' in os.environ
 
 
 @check("rhg", "running with rhg as 'hg'")