diff --git a/test/per_file_coverage.sh b/test/per_file_coverage.sh
index 1b33d066f2e4b..ee7d8bf40ac98 100755
--- a/test/per_file_coverage.sh
+++ b/test/per_file_coverage.sh
@@ -12,6 +12,7 @@ declare -a KNOWN_LOW_COVERAGE=(
 "source/common/singleton:95.1"
 "source/common/api:72.9"
 "source/common/api/posix:71.8"
+"source/common/event:92.9"
 "source/common/filter:96.3"
 "source/common/filter/http:96.3"
 "source/common/init:96.2"