diff --git a/tests/phpunit/CiteIntegrationTest.php b/tests/phpunit/CiteIntegrationTest.php
index 3ddd2072b..e4e614396 100644
--- a/tests/phpunit/CiteIntegrationTest.php
+++ b/tests/phpunit/CiteIntegrationTest.php
@@ -7,6 +7,7 @@ use Cite\ErrorReporter;
 use Cite\ReferenceListFormatter;
 use Cite\ReferenceStack;
 use Language;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Parser\Parser;
 use ParserOptions;
 use Wikimedia\TestingAccessWrapper;
@@ -19,7 +20,7 @@ class CiteIntegrationTest extends \MediaWikiIntegrationTestCase {
 
 	protected function setUp(): void {
 		parent::setUp();
-		$this->overrideConfigValue( 'LanguageCode', 'qqx' );
+		$this->overrideConfigValue( MainConfigNames::LanguageCode, 'qqx' );
 	}
 
 	/**
diff --git a/tests/phpunit/integration/AnchorFormatterTest.php b/tests/phpunit/integration/AnchorFormatterTest.php
index 506349f65..053038123 100644
--- a/tests/phpunit/integration/AnchorFormatterTest.php
+++ b/tests/phpunit/integration/AnchorFormatterTest.php
@@ -3,6 +3,7 @@
 namespace Cite\Tests\Integration;
 
 use Cite\AnchorFormatter;
+use MediaWiki\MainConfigNames;
 use MediaWiki\Parser\Sanitizer;
 use Wikimedia\TestingAccessWrapper;
 
@@ -14,7 +15,7 @@ class AnchorFormatterTest extends \MediaWikiIntegrationTestCase {
 
 	protected function setUp(): void {
 		parent::setUp();
-		$this->overrideConfigValue( 'FragmentMode', [ 'html5' ] );
+		$this->overrideConfigValue( MainConfigNames::FragmentMode, [ 'html5' ] );
 	}
 
 	public function testRefKey() {