Formal methods have been successfully used to develop advanced test generation techniques. While various test generation tools and test coverage criteria have been proposed, their adoption in industrial practice remains fragmented. This paper presents SeaCoral, a novel open-source toolset for testing C programs, which aims to facilitate the industrial application of diverse testing technologies by integrating them within a single framework. SeaCoral offers a comprehensive set of testing services, ranging from the specification of test objectives for selected test coverage criteria, through test case generation and the detection of uncoverable objectives, to the measurement of the resulting coverage. It integrates a rich set of analyzers: the fuzzer libFuzzer, the model-checker CBMC, the dynamic symbolic execution tool KLEE, and the static analyzer LUncov for detecting uncoverable test objectives. These analyzers enrich each other’s results through a shared store of test objectives and a shared corpus of test cases. Particular attention is paid to the careful handling of runtime errors and initialization functions, which are essential for industrial applications. Initial experiments confirm the benefits of the proposed toolset.