diff --git a/src/config.ts b/src/config.ts
index 36bd7eb..954f2d0 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -7,11 +7,6 @@ import { ignoreInternalSaveMessageFilter } from './builtInMessageFilters';
  */
 export type MessageFilter = (message: IMessage) => boolean;
 
-/**
- * Returns true if a message
- */
-export type MessageFilter = (message: IMessage) => boolean;
-
 export interface IConfig {
     /**
      * timeout in milliseconds before a BotTester runner will fail a test (when not overriden)