# Required extension not being installed in tests

**URL:** <https://discourse.slicer.org/t/required-extension-not-being-installed-in-tests/9444>\
**Category:** Support\
**Tags:** extensions-manager\
**Created:** [December 9, 2019, 11:10am UTC](https://discourse.slicer.org/t/required-extension-not-being-installed-in-tests/9444 "2019-12-09T11:10:46Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [December 9, 2019, 3:40pm UTC](https://discourse.slicer.org/t/required-extension-not-being-installed-in-tests/9444/2 "2019-12-09T15:40:32Z")

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It appears that another extension, SequenceRegistration, is also having the same issue. That extension depends on Sequences and SlicerElastix. Here’s the nightly Windows build for SequenceRegistration that has the same CMake warning: [http://slicer.cdash.org/viewConfigure.php?buildid=1770198](http://slicer.cdash.org/viewConfigure.php?buildid=1770198).

A previous SlicerElastix error due to being a dependency was brought up in [Failing Tests - ImportError: No module named Elastix](https://discourse.slicer.org/t/failing-tests-importerror-no-module-named-elastix/7202), but that solution by @jcfr is evidently not working anymore.

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_[View the full topic](https://discourse.slicer.org/t/required-extension-not-being-installed-in-tests/9444)._