diff --git a/tests/phpunit/includes/bootstrap.php b/tests/phpunit/includes/bootstrap.php
index b73dd4e09c..3f49856b13 100644
--- a/tests/phpunit/includes/bootstrap.php
+++ b/tests/phpunit/includes/bootstrap.php
@@ -61,7 +61,7 @@ if ( $multisite ) {
 	define( 'BLOG_ID_CURRENT_SITE', 1 );
 	$GLOBALS['base'] = '/';
 } else {
-	echo "Running as single site... To run multisite, use -c multisite.xml" . PHP_EOL;
+	echo "Running as single site... To run multisite, use -c tests/phpunit/multisite.xml" . PHP_EOL;
 }
 unset( $multisite );