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https://watirmelon.blog/tag/testing-pyramid/ A Software Testing Blog
 By Alister Scott.

https://watirmelon.blog/tag/testing-pyramid/

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https://speakerdeck.com/tsuemura/kurosuburauzatesutofalsean-toan-toan

https://martinfowler.com/articles/practical-test-pyramid.html 26 February 2018

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