1. Run pytest with coverage using the command: `pytest --cov --cov-report=annotate:cov_annotate`.
2. If targeting a specific module, use: `pytest --cov=your_module_name --cov-report=annotate:cov_annotate`.
3. Open the `cov_annotate` directory to view annotated source code files.
4. Identify files with less than 100% coverage.
5. Examine files for lines starting with `!` indicating missing test coverage.
6. Write new tests or modify existing ones to cover the uncovered lines.
7. Repeat steps 1-6 until 100% coverage is achieved.