A solution for automation of collecting, storing, and processing patient information used in medical institutions.Within Agile mindset approaches, the customer needed complex automation of testing a cross-platform web system from scratch to simplify work with the future products.Clinic Management AppIt is one of 5 solutions from a leading developer of online systems for medical institutions, successfully operating on the market since 2003. During this time, the system has increased its modules and functionality and released several versions.Values deliveredZappleTech specialists developed and successfully implemented a complex of 2,000 cases of automatic product testing. 700 tests are specific for this solution. Tests covered all manual tasks, providing an optimal query execution time in just 1 minute. We built API test chains for smoke scope developed to identify potential failures and defects at a lower level. As a result, over 100 critical system errors were identified and eliminated. We ensured coverage of an additional layer of testing and identification of future threats through API tests.SolutionsWe implemented an architecture for testing, developed and integrated the required tests into Gitlab CI, and provided cross-platform testing support.ResultsWe built all types of automatic testing from scratch with early detection of errors and defects and keeping communications with the development team for timely elimination of bugs.