How to Run a Specific Spec File in Playwright Tests Sequentially

Running tests sequentially in Playwright is crucial when test states affect each other. The guide demonstrates using `test.describe.configure({ mode: 'default' })` to run tests one at a time within a describe block, ensuring state consistency without affecting the parallel execution of other tests. It also highlights the `mode: 'serial'` option, which skips subsequent tests if one fails but advises tests to handle their data setup and cleanup.