--- a/taskcluster/taskgraph/optimize/backstop.py
+++ b/taskcluster/taskgraph/optimize/backstop.py
@@ -6,16 +6,17 @@ from __future__ import absolute_import, 
 
 from taskgraph.optimize import OptimizationStrategy, register_strategy
 from taskgraph.util.attributes import match_run_on_projects
 from taskgraph.util.backstop import is_backstop, BACKSTOP_PUSH_INTERVAL, BACKSTOP_TIME_INTERVAL
 
 
 @register_strategy('backstop', args=(BACKSTOP_PUSH_INTERVAL, BACKSTOP_TIME_INTERVAL, {'all'}))
 @register_strategy("push-interval-10", args=(10, 0, {'try'}))
+@register_strategy("push-interval-20", args=(20, 0, {'try'}))
 @register_strategy("push-interval-25", args=(25, 0, {'try'}))
 class Backstop(OptimizationStrategy):
     """Ensures that no task gets left behind.
 
     Will schedule all tasks either every Nth push, or M minutes. This behaviour
     is only enabled on autoland. For all other projects, the
     `remove_on_projects` flag determines what will happen.