diff --git a/README.md b/README.md
index e94b562..b39fe31 100644
--- a/README.md
+++ b/README.md
@@ -130,6 +130,53 @@ describe('http', function() {
 Note that `yield` and *generators* are part of [**ECMA6**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*), so it may not work on older node.js versions. It will wait for the delay to complete the `beforeEach` before proceeding to the test `it`.
 
 
+#### Testing messages sent to other rooms
+
+You can also test messages sent by your script to other rooms through Hubot's `robot.messageRoom(...)` method.
+
+Given the following script:
+```javascript
+module.exports = robot =>
+  robot.respond(/announce otherRoom: (.+)$/i, msg => {
+    robot.messageRoom('otherRoom', "@#{msg.envelope.user.name} said: #{msg.msg.match[1]}");
+  })
+```
+
+you could test the messages sent to other rooms like this:
+```javascript
+const Helper = require('../src/index');
+const helper = new Helper('../scripts/message-room.js');
+
+const expect = require('chai').expect;
+
+describe('message-room', function() {
+  beforeEach(function() {
+    this.room = helper.createRoom({name: 'room', httpd: false});
+  });
+
+  context('user asks hubot to announce something', function() {
+    beforeEach(function() {
+      return co(function*() {
+        yield this.room.user.say('alice', '@hubot announce otherRoom: I love hubot!');
+      }.bind(this));
+    });
+
+    it('should not post to this channel', function() {
+      expect(this.room.messages).to.eql([
+        ['alice', '@hubot announce otherRoom: I love hubot!']
+      ]);
+    });
+
+    it('should post to the other channel', function() {
+      expect(this.room.robot.messagesTo['otherRoom']).to.eql([
+        ['hubot', '@alice says: I love hubot!']
+      ]);
+    });
+  });
+});
+```
+
+
 #### Testing events
 
 You can also test events emitted by your script.  For example, Slack users
diff --git a/src/index.js b/src/index.js
index dd29a51..b7d6885 100644
--- a/src/index.js
+++ b/src/index.js
@@ -19,9 +19,22 @@ class MockRobot extends Hubot.Robot {
     if (httpd == null) { httpd = true; }
     super(null, null, httpd, 'hubot');
 
+    this.messagesTo = {};
+
     this.Response = MockResponse;
   }
 
+  messageRoom(roomName, str) {
+    if (roomName == this.adapter.name) {
+      this.adapter.messages.push(['hubot', str]);
+    } else {
+      if (!(roomName in this.messagesTo)) {
+        this.messagesTo[roomName] = [];
+      }
+      this.messagesTo[roomName].push(['hubot', str]);
+    }
+  }
+
   loadAdapter() {
     this.adapter = new Room(this);
   }
diff --git a/test/message-room_test.js b/test/message-room_test.js
new file mode 100644
index 0000000..b0f031a
--- /dev/null
+++ b/test/message-room_test.js
@@ -0,0 +1,33 @@
+'use strict'
+
+const Helper = require('../src/index');
+const helper = new Helper('./scripts/message-room.js');
+
+const co     = require('co');
+const expect = require('chai').expect;
+
+describe('message-room', function() {
+  beforeEach(function() {
+    this.room = helper.createRoom({name: 'room', httpd: false});
+  });
+
+  context('user asks hubot to announce something', function() {
+    beforeEach(function() {
+      return co(function*() {
+        yield this.room.user.say('alice', '@hubot announce otherRoom: I love hubot!');
+      }.bind(this));
+    });
+
+    it('should not post to this channel', function() {
+      expect(this.room.messages).to.eql([
+        ['alice', '@hubot announce otherRoom: I love hubot!']
+      ]);
+    });
+
+    it('should post to the other channel', function() {
+      expect(this.room.robot.messagesTo['otherRoom']).to.eql([
+        ['hubot', '@alice says: I love hubot!']
+      ]);
+    });
+  });
+});
diff --git a/test/scripts/message-room.js b/test/scripts/message-room.js
new file mode 100644
index 0000000..aaf0436
--- /dev/null
+++ b/test/scripts/message-room.js
@@ -0,0 +1,6 @@
+// Description:
+//   Test script
+module.exports = robot =>
+  robot.respond(/announce otherRoom: (.+)$/i, msg => {
+    robot.messageRoom('otherRoom', '@' + msg.envelope.user.name + ' says: ' + msg.match[1]);
+  })