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Testing & QA

Left Shift Testing

/left ʃɪft ˈtestɪŋ/

Definition

Moving testing earlier in the development lifecycle to catch bugs sooner and reduce the cost of fixing them.

Example in context

"Shift-left: devs write unit tests alongside code — bugs caught in development cost 10× less than in production."

Related terms

  • TDD — Test-Driven Development — write a failing test first, then the minimum code to pass it, then refactor.

Practice this term

Master Left Shift Testing in context by working through exercises in the Testing & QA module. You'll see the term used in real engineering scenarios with multiple-choice, fill-in-the-blank, and matching drills.

Practice in exercises → Browse all words

Frequently Asked Questions

What does "Left Shift Testing" mean?

Moving testing earlier in the development lifecycle to catch bugs sooner and reduce the cost of fixing them.

How do you pronounce "Left Shift Testing"?

"Left Shift Testing" is pronounced /left ʃɪft ˈtestɪŋ/.

Can you use "Left Shift Testing" in a sentence?

"Shift-left: devs write unit tests alongside code — bugs caught in development cost 10× less than in production."