diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 6b8068b..4aa4045 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -80,7 +80,7 @@ function str_contains( string $haystack, string $needle ) {
 	 * @return bool
 	 */
 	function str_ends_with( string $haystack, string $needle ) {
-		return empty( $needle ) || substr( $haystack, -strlen( $needle ) === $needle );
+		return empty( $needle ) || substr( $haystack, -strlen( $needle ) ) === $needle;
 	}
 }
 if ( extension_loaded( 'mbstring' ) ) {