diff --git a/.phpcs.xml b/.phpcs.xml
index 534da5b..31ab3a1 100644
--- a/.phpcs.xml
+++ b/.phpcs.xml
@@ -2,7 +2,6 @@
 <ruleset>
 	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki">
 		<exclude name="MediaWiki.Commenting.PropertyDocumentation.MissingDocumentationPrivate" />
-		<exclude name="MediaWiki.PHPUnit.AssertEmpty.AssertEmptyUsed" />
 	</rule>
 	<file>.</file>
 	<arg name="extensions" value="php" />
diff --git a/tests/phpunit/includes/HooksTest.php b/tests/phpunit/includes/HooksTest.php
index e675b72..10e9c81 100644
--- a/tests/phpunit/includes/HooksTest.php
+++ b/tests/phpunit/includes/HooksTest.php
@@ -69,9 +69,9 @@ class HooksTest extends MediaWikiLangTestCase {
 		( new Hooks() )->onSkinAfterContent( $data, $sk );
 
 		if ( $enabled ) {
-			$this->assertNotEmpty( $data, 'Cookie warning should be present' );
+			$this->assertNotSame( '', $data, 'Cookie warning should be present' );
 		} else {
-			$this->assertEmpty( $data, 'Cookie warning should not be present' );
+			$this->assertSame( '', $data, 'Cookie warning should not be present' );
 			return;
 		}