diff --git a/test/_flow.js b/test/_flow.js
index 8e52b39..63737c5 100644
--- a/test/_flow.js
+++ b/test/_flow.js
@@ -10,14 +10,6 @@ chalk.constructor({level: 1});
 new chalk.constructor({enabled: 'true'});
 new chalk.constructor({enabled: true});
 
-// $ExpectError (Can't pass in null)
-chalk.underline(null);
-chalk.underline('foo');
-
-// $ExpectError (Can't pass in null)
-chalkStderr.underline(null);
-chalkStderr.underline('foo');
-
 // $ExpectError (Can't have typo in chalk method)
 chalk.rd('foo');
 chalk.red('foo');