diff --git a/test/per_file_coverage.sh b/test/per_file_coverage.sh
index a6a3d9606a5c0..7ee0e40a1f8cc 100755
--- a/test/per_file_coverage.sh
+++ b/test/per_file_coverage.sh
@@ -6,6 +6,7 @@ declare -a KNOWN_LOW_COVERAGE=(
 "source/common:96.0"
 "source/common/api:82.5"
 "source/common/api/posix:81.3"
+"source/common/common/posix:94.5"
 "source/common/config:96.4"
 "source/common/crypto:88.1"
 "source/common/event:95.1" # Emulated edge events guards don't report LCOV