--- a/tests/test-remotefilelog-repack-fast.t	Mon Dec 09 09:54:27 2019 +0100
+++ b/tests/test-remotefilelog-repack-fast.t	Mon Dec 09 09:57:34 2019 +0100
@@ -8,6 +8,7 @@
   > fastdatapack=True
   > [devel]
   > remotefilelog.ensurestart=True
+  > remotefilelog.bg-wait=True
   > EOF
 
   $ hg init master