Add missing argument to constructor function

tests/phpunit/Presentation/UiBuilderUnitTest.php

@@ -44,7 +44,7 @@ private function newUiBuilder(
 		return new UiBuilder(
 			$config ?? new Config(),
 			new SpyFacetHtmlBuilder(),
-			$this->createMock( LocalizedTextLookup::class ),
+			$this->newLocalizedTextLookup(),
 			$templateSpy ?? new SpyTemplateParser(),
 			$queryStringParser ?? new StubQueryStringParser()
 		);
@@ -164,4 +164,8 @@ public function testTabsViewModelSelectsCurrentItemType(): void {
 		);
 	}
 
+	private function newLocalizedTextLookup(): LocalizedTextLookup {
+		return WikibaseFacetedSearchExtension::getInstance()->getLocalizedTextLookup( MediaWikiServices::getInstance()->getContentLanguage() );
+	}
+
 }