diff --git a/composer.json b/composer.json
index 4fdd4dbd..449e83da 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
 	},
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "0.9.2",
-		"mediawiki/mediawiki-codesniffer": "15.0.0",
+		"mediawiki/mediawiki-codesniffer": "16.0.0",
 		"jakub-onderka/php-console-highlighter": "0.3.2",
 		"mediawiki/minus-x": "0.2.1"
 	},
diff --git a/tests/phpunit/LanguageSearchTest.php b/tests/phpunit/LanguageSearchTest.php
index 4f5289d9..042153f0 100644
--- a/tests/phpunit/LanguageSearchTest.php
+++ b/tests/phpunit/LanguageSearchTest.php
@@ -21,7 +21,7 @@
 /**
  * @covers LanguageNameSearch
  */
-class LanguageSearchTest extends PHPUnit_Framework_TestCase {
+class LanguageSearchTest extends PHPUnit\Framework\TestCase {
 	/**
 	 * @dataProvider searchDataProvider
 	 */