diff --git a/devops/cts_exclude_filter b/devops/cts_exclude_filter
index 2e4d5db5174d2..e14c4e0eb1af9 100644
--- a/devops/cts_exclude_filter
+++ b/devops/cts_exclude_filter
@@ -1,3 +1,5 @@
+# These two take too much time
 kernel_bundle
 marray
+# https://github.com/intel/llvm/issues/12926
 h_item