# Testing the trigger node

**URL:** <https://discourse.nodered.org/t/testing-the-trigger-node/11752>\
**Category:** General\
**Created:** [1 June 2019 18:47 UTC](https://discourse.nodered.org/t/testing-the-trigger-node/11752 "2019-06-01T18:47:48Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Andrei](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/andrei/32/10446_2.png) [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Post date:** [1 June 2019 19:06 UTC](https://discourse.nodered.org/t/testing-the-trigger-node/11752/3 "2019-06-01T19:06:00Z")

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> [@Andrei](#):
>
> I noticed that the blue square indicator in the trigger node will appear only the very first time the trigger node receives a message (after it is deployed) and afterwards this indicator will no longer show up.
> 
> I added a catch node and note that it always captures an `undefined` value from the trigger node.

Sure, doing now. Thanks Dave. 😉

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