diff --git a/modifier/debug.ts b/modifier/debug.ts
index 9368471..a7f8456 100644
--- a/modifier/debug.ts
+++ b/modifier/debug.ts
@@ -1,4 +1,6 @@
 // Copyright 2021-Present the Unitest authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
 import { bgYellow, black, bold } from "../deps.ts";
 import type { PostModifier } from "./types.ts";
 
diff --git a/modifier/trim.ts b/modifier/trim.ts
index 13bef68..9b5cae0 100644
--- a/modifier/trim.ts
+++ b/modifier/trim.ts
@@ -1,4 +1,6 @@
 // Copyright 2021-Present the Unitest authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
 import type { PreModifier } from "./types.ts";
 
 /** Use `.trim` to removes the leading and trailing white space and line terminator