diff --git a/qa/suites/rados/monthrash/ceph.yaml b/qa/suites/rados/monthrash/ceph.yaml
index dbca827d610..124ac3850c3 100644
--- a/qa/suites/rados/monthrash/ceph.yaml
+++ b/qa/suites/rados/monthrash/ceph.yaml
@@ -8,8 +8,12 @@ overrides:
         mon osdmap full prune min: 15
         mon osdmap full prune interval: 2
         mon osdmap full prune txsize: 2
+        mon scrub inject crc mismatch: 0.01
+        mon scrub inject missing keys: 0.05
 # thrashing monitors may make mgr have trouble w/ its keepalive
     log-ignorelist:
+      - ScrubResult
+      - scrub mismatch
       - overall HEALTH_
       - \(MGR_DOWN\)
 # slow mons -> slow peering -> PG_AVAILABILITY