Considering the high cost and poor timeliness of manual testing and the insufficient scalability of conventional automatic interface testing tools, an interface test platform (OLa) that supports the parallel testing of test case sets is proposed in this study. OLa is divided into the user presentation layer, application logic layer, data service layer, and test case execution layer according to a layered architecture model. Among them, the user presentation layer is developed on the basis of the Vue framework, which is combined with Vue Router, Vuex, and other tools to realize the single-page application. The application logic layer is realized with the Spring Boot framework, and the data service layer is based on the MyBatis-Plus framework and Spring Data framework. The test case execution layer uses okhttp3, fastjson, Jackson, and other tools to implement interface testing. In addition, according to the ideas of the technical architecture of systems, Java network programming, and abstraction-oriented programming, this study innovatively proposes the test case execution process with the C/S architecture and the automatic matching verification method based on parameter identification, which can solve the problem that some traditional automatic testing tools cannot support parallel testing. The experimental results show that OLa can support test case testing, serial testing, and parallel testing of test case sets and can automatically identify test case parameters and verify the interface response content, which improves the flexibility and effectiveness of interface testing. Moreover, it can reduce the difficulty of interface testing and improve the efficiency of interface testing without interdependence between test cases.