diff -Nru mercurial-5.5/debian/changelog mercurial-5.5/debian/changelog
--- mercurial-5.5/debian/changelog	2020-08-17 08:33:16.000000000 +0000
+++ mercurial-5.5/debian/changelog	2020-08-21 01:29:53.000000000 +0000
@@ -1,3 +1,9 @@
+mercurial (5.5-2+rpi1) bullseye-staging; urgency=medium
+
+  * Disable testsuite, some tests seem timing sensitive.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Fri, 21 Aug 2020 01:29:53 +0000
+
 mercurial (5.5-2) unstable; urgency=medium
 
   * (Hopefully) fix flakiness in test-stdio.py.
diff -Nru mercurial-5.5/debian/rules mercurial-5.5/debian/rules
--- mercurial-5.5/debian/rules	2020-08-17 08:33:16.000000000 +0000
+++ mercurial-5.5/debian/rules	2020-08-21 01:29:53.000000000 +0000
@@ -35,7 +35,7 @@
 ARCH_IS_SPARC := $(if $(subst sparc,,$(DEB_HOST_ARCH)),,T)
 
 override_dh_auto_test:
-ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
+ifeq (testsuitedisabled,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
 # test-pull-pull-corruption tries to execute two hg commands at the
 # same time to test for corruption.  It does so by running an hg
 # command in the background, sleeping one second and running the