# Extension contribution checklist

**URL:** <https://discourse.slicer.org/t/extension-contribution-checklist/4975>\
**Category:** Development\
**Created:** [December 5, 2018, 6:18pm UTC](https://discourse.slicer.org/t/extension-contribution-checklist/4975 "2018-12-05T18:18:03Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![brhoom](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/brhoom/32/1228_2.png) [@brhoom](https://discourse.slicer.org/u/brhoom)\
**Post date:** [December 6, 2018, 5:59pm UTC](https://discourse.slicer.org/t/extension-contribution-checklist/4975/2 "2018-12-06T17:59:25Z")

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Thanks for your effort.

I don’t know why [my modules tests always fail](http://slicer.cdash.org/index.php?project=Slicer4&filtercount=1&showfilters=1&field1=buildname&compare1=63&value1=SlicerCochlea)?

The module download elastix binaries from our server and use them in its logic class. Is there anything I should to make things work? I run the testing in differentWindow and Ubuntu machines and it works. The extension does not support Mac for now but mac users are welcome to modify it and I can help in this if needed (I don’t have mac).

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_[View the full topic](https://discourse.slicer.org/t/extension-contribution-checklist/4975)._