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Tallis Health

Healthtech

Tallis Health raised its test coverage by 31 points

Tester wrote the tests nobody had time for, one module at a time, without slowing releases.

test coverage in one quarter

Tallis Health

2,140

new tests

64% → 95%

coverage

0

releases delayed

“

The tests read like our best engineer wrote them. Reviewing them was the easy part.

Daniel Ferreira

VP Engineering, Tallis Health

The goal

Tallis Health needed full coverage on its patient records service before an audit, with no freeze on releases.

The run

  • Reader listed every function without a test.

  • Tester wrote tests module by module, in the team’s style.

  • Reviewer kept the tests that proved behaviour, not lines.

What changed

Coverage went from 64% to 95% in a quarter, and the audit found nothing to fix.

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