diff --git a/kola-denylist.yaml b/kola-denylist.yaml
index 45c3e7a..1177407 100644
--- a/kola-denylist.yaml
+++ b/kola-denylist.yaml
@@ -29,6 +29,12 @@
   osversion:
     - rhel-10.1
 
+- pattern: coreos.unique.boot.failure
+  tracker: https://github.com/openshift/os/issues/1873
+  osversion:
+    - rhel-9.6
+    - centos-9
+
 - pattern: ext.config.shared.boot.install-bootloader-multipath
   tracker: https://github.com/coreos/rhel-coreos-config/issues/99
   osversion: