diff -r 32f15b361f36 -r fab9dda0f2a3 tests/test-bisect.t
--- a/tests/test-bisect.t	Tue Oct 14 13:27:00 2014 -0700
+++ b/tests/test-bisect.t	Tue Oct 14 13:34:25 2014 -0700
@@ -555,12 +555,10 @@
 Check that bisect does not break on obsolete changesets
 =========================================================
 
-  $ cat > ${TESTTMP}/obs.py << EOF
-  > import mercurial.obsolete
-  > mercurial.obsolete._enabled = True
+  $ cat >> $HGRCPATH << EOF
+  > [experimental]
+  > evolution=createmarkers
   > EOF
-  $ echo '[extensions]' >> $HGRCPATH
-  $ echo "obs=${TESTTMP}/obs.py" >> $HGRCPATH
 
 tip is obsolete
 ---------------------