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Various individual volunteers working with Test Case library in PractiTest, managed by Vedha Kannan.
Pritesh Patel + colleagues from BioConnect are looking at articulating a test strategy on the Mobile App, and getting a greater range of testing & test approaches accommodated in PrtactiTest.
Luca Dusi has a team of ~20 Italian testers, with a focus on:
Italian language
A wide range of devices & form factors
Error conditions
Usability
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