diff --git a/core/BackgroundJobs/CheckCodeIntegrityJob.php b/core/BackgroundJobs/CheckCodeIntegrityJob.php
index edfe25dd11a58..fbe8b375e9fa0 100644
--- a/core/BackgroundJobs/CheckCodeIntegrityJob.php
+++ b/core/BackgroundJobs/CheckCodeIntegrityJob.php
@@ -152,7 +152,7 @@ public static function formatSummary(IL10N $l, array $summary): array {
 		if ($unverified !== []) {
 			$sentences[] = $l->n(
 				'The signature of %s is missing or invalid, so it could not be verified.',
-				'The signatures of %s are missing or invalid, so they could not be verified.',
+				'The %n signatures of %s are missing or invalid, so they could not be verified.',
 				count($unverified),
 				[implode(', ', $unverified)],
 			);
diff --git a/tests/Core/BackgroundJobs/CheckCodeIntegrityJobTest.php b/tests/Core/BackgroundJobs/CheckCodeIntegrityJobTest.php
index ac15823e7890d..b49ec1a6d7c75 100644
--- a/tests/Core/BackgroundJobs/CheckCodeIntegrityJobTest.php
+++ b/tests/Core/BackgroundJobs/CheckCodeIntegrityJobTest.php
@@ -311,7 +311,7 @@ public static function dataFormatSummary(): array {
 			'unverified only' => [['files' => 0, 'unverified' => ['core']], ['The signature of core is missing or invalid, so it could not be verified.']],
 			'both' => [['files' => 1, 'unverified' => ['core', 'files']], [
 				'1 file does not match the signed release. It may have been modified or added without authorization.',
-				'The signatures of core, files are missing or invalid, so they could not be verified.',
+				'The 2 signatures of core, files are missing or invalid, so they could not be verified.',
 			]],
 			'missing parameters' => [[], []],
 		];