assertWPError

phpunit/tests/fonts/font-library/wpFontLibrary/registerFontCollection.php

@@ -74,6 +74,6 @@ public function test_should_return_error_if_id_is_repeated() {
 		$this->setExpectedIncorrectUsage( 'WP_Font_Library::register_font_collection' );
 		// Try to register a second collection with same id.
 		$collection2 = WP_Font_Library::register_font_collection( $config2 );
-		$this->assertInstanceOf( 'WP_Error', $collection2, 'Should return an instance of WP_Error.' );
+		$this->assertWPError( $collection2, 'A WP_Error should be returned.' );
 	}
 }