Here are some ways to ensure test quality:
1. Develop detailed test plans and test cases: The test plan should include the objectives of the test, the scope of the test, the method of the test and the timetable for the test. Test cases should cover all functions and scenarios, and should be fully tested and verified.
2. Use automated testing tools: automated testing can improve the efficiency and accuracy of testing and reduce the occurrence of human errors.
3. Conduct multi-level testing: testing should be conducted at multiple levels from unit testing, integration testing, system testing to acceptance testing, to ensure that testing at each stage can discover and solve problems.
4. Perform regression testing: Regression testing should be performed after each modification of the code to ensure that the modification will not affect the original function.
5. Conduct quality control: Quality control should be carried out during the testing process, including the recording of test results, tracking and solving of problems, training and evaluation of testers, etc.
6. Conduct code review: Code review can find potential problems and errors in the code, and improve the quality and maintainability of the code.
7. Conduct performance testing: Performance testing can discover system bottlenecks and performance problems, and improve system stability and reliability.
8. Conduct security testing: Security testing can discover system security loopholes and risks, and improve system security and credibility.