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Learn how to choose between Browser Contexts and Pages in Playwright to balance test isolation and CI performance, including patterns for authenticated state reuse.
Pytest fixture scope is a speed-versus-isolation trade-off. Here's a decision rule for choosing function, module, or session scope, plus how to verify the behavior you actually get.
Playwright's default per-test BrowserContext is almost always the right isolation choice. This guide compares it against shared contexts and fresh browser launches, and shows the storageState setup-project pattern for fast, isolated authenticated tests.
Learn how Playwright Test isolates each worker with its own BrowserContext, eliminating flakiness, improving determinism, and balancing speed with memory. Includes a concrete example and practical trade‑offs.
Replace real API calls with deterministic stubs in Cypress using cy.intercept(). Follow a clear workflow to define, trigger, and verify interceptions, simulate errors, and recover from common pitfalls.
Enable pytest-xdist only for isolated, deterministic tests. Compare serial, loadfile, loadscope and loads, weigh speed vs stability, and apply a conservative pytest.ini with function-scoped fixtures and validation steps.
pytest
cypressio