# All of a sudden React Native build fails: Unknown config option "transformIgnorePatterns" with value

**URL:** <https://discuss.circleci.com/t/all-of-a-sudden-react-native-build-fails-unknown-config-option-transformignorepatterns-with-value/8339>\
**Category:** Build Environment\
**Created:** [November 29, 2016, 5:56pm UTC](https://discuss.circleci.com/t/all-of-a-sudden-react-native-build-fails-unknown-config-option-transformignorepatterns-with-value/8339 "2016-11-29T17:56:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tux](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/tux/32/13858_2.png) [@tux](https://discuss.circleci.com/u/tux)\
**Post date:** [November 29, 2016, 5:56pm UTC](https://discuss.circleci.com/t/all-of-a-sudden-react-native-build-fails-unknown-config-option-transformignorepatterns-with-value/8339/1 "2016-11-29T17:56:46Z")

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Builds were working fine until today when these errors showed up:

Error: Unknown config option “transformIgnorePatterns” with value “node\_modules/(?!(jest-)?react-native|react-clone-referenced-element)”. This is either a typing error or a user mistake and fixing it will remove this message.  
Determining test suites to run…Running 56 test suites… FAIL …

There is no test script changes in the project. All tests ran fine on local machines. What could be the cause and how can I get around?

Thanks!

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<div class="post-metadata">

**Author:** ![tux](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/tux/32/13858_2.png) [@tux](https://discuss.circleci.com/u/tux)\
**Post date:** [November 30, 2016, 10:40pm UTC](https://discuss.circleci.com/t/all-of-a-sudden-react-native-build-fails-unknown-config-option-transformignorepatterns-with-value/8339/2 "2016-11-30T22:40:20Z")

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Ok. We figured out this was due to a “jest-react-native” upgrade. We reverted back to version “17.0.3” and it built okay.

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**Author:** ![system](https://global.discourse-cdn.com/circleci/original/3X/5/1/511608acda8e85906e15909b57bd0a46c1dbe291.png) [@system](https://discuss.circleci.com/u/system)\
**Post date:** [June 18, 2018, 11:38am UTC](https://discuss.circleci.com/t/all-of-a-sudden-react-native-build-fails-unknown-config-option-transformignorepatterns-with-value/8339/3 "2018-06-18T11:38:56Z")

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