shift-left-testing

Shift-left testing moves quality validation earlier in the development lifecycle to catch defects when they are cheapest to fix, reducing rework and raising overall delivered quality through collaborative practices like Three Amigos and test-first design.

To implement shift-left testing, have QA participate in sprint planning and story refinement to ensure testability and acceptance criteria are well-defined, then run a Three Amigos session before development to align product needs, design constraints, and testing strategy.

A Three Amigos session is a collaborative meeting before development that aligns product needs, design constraints, and testing strategy. Run it for an upcoming feature to surface testable requirements and ensure shared understanding across roles.

Use a Definition of Done with automated quality gates to prevent regressions and ensure consistent quality by embedding test-first design and developer-QA pairing during implementation, enforcing quality criteria before work is considered complete.

Shift-left testing relies on cross-functional collaboration patterns like dev/QA pairing and Three Amigos sessions, so while dedicated QA participation strengthens the process, the core test-first design and DoD-driven gates can be adopted by cross-functional team members.

Shift-left testing requires sustained cross-team collaboration and cultural change to sustain quality culture and measurable improvement over time, which can be difficult for established teams resistant to altering their sprint planning and development workflows.