# Why do some modules do not include Reload&Test ？

**URL:** <https://discourse.slicer.org/t/why-do-some-modules-do-not-include-reload-test/18225>\
**Category:** Development\
**Created:** [June 19, 2021, 5:23am UTC](https://discourse.slicer.org/t/why-do-some-modules-do-not-include-reload-test/18225 "2021-06-19T05:23:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![slicer365](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/slicer365/32/67549_2.png) [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Post date:** [June 19, 2021, 5:23am UTC](https://discourse.slicer.org/t/why-do-some-modules-do-not-include-reload-test/18225/1 "2021-06-19T05:23:27Z")

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Why some modules do not include Reload&Test,

as is shown in this picture.

![捕获](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/f/3fd93510df9c5bd2d032beaf2fb08fff9e29d8db.png)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 19, 2021, 12:37pm UTC](https://discourse.slicer.org/t/why-do-some-modules-do-not-include-reload-test/18225/2 "2021-06-19T12:37:46Z")

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Only Pytho on scripted modules can be dynamically reloaded while Slicer is running. Crop volumes module (and most Slicer core modules) is implemented in C++.