diff --git a/tests/SearchVariantSubsitesTest.php b/tests/SearchVariantSubsitesTest.php
index d6991a0..145cd67 100644
--- a/tests/SearchVariantSubsitesTest.php
+++ b/tests/SearchVariantSubsitesTest.php
@@ -31,7 +31,7 @@ class SearchVariantSubsiteTest extends SapphireTest
             self::$index = singleton(static::class);
         }
 
-        Config::inst()->update(Injector::class, SearchUpdateProcessor::class, [
+        Config::inst()->merge(Injector::class, SearchUpdateProcessor::class, [
             'class' => SearchUpdateImmediateProcessor::class
         ]);