Write tests that are maintainable, self-documenting, and that promote good testing practices: 1. **Use proper assertion mechanisms**: Prefer modern assertion patterns over legacy approaches. Use built-in assertion methods that clearly indicate what is being tested. ```csharp // Bad: Custom test logic with manual exception checking bool canceled = false; try { await GetAsync(useVersion, testAsync, uri, cts.Token); } catch (TaskCanceledException) { canceled = true; } Assert.True(canceled); // Good: Use built-in assertion methods await Assert.ThrowsAsync(() => GetAsync(useVersion, testAsync, uri, cts.Token)); ``` 2. **Create reusable test helpers** for common operations instead of duplicating test code. This improves maintainability and readability while reducing the chance of inconsistencies. 3. **Use modern test patterns**: Replace legacy patterns like "return 100 == success" with proper Assert-based validation that clearly communicates test expectations and failures. 4. **Remove commented-out or dead test code** that doesn't contribute to validation. Keep tests clean and focused on what's actually being tested. 5. **Use appropriate conditional attributes** to ensure tests properly convert Debug.Assert failures to test failures and run only when the tested functionality is supported.