Implementations generally relate to test coverage of multi-module code. In some implementations, a method includes testing, at a server, program code from a plurality of software modules of a process. The method further includes determining individual test coverage information for each software module of the process based on the testing of the program code for each software module, where the individual test coverage information includes individual test results for each software module and an individual test coverage value for each software module. The method further includes aggregating the individual test coverage information of the software modules. The method further includes determining overall test coverage information for the software modules, where the overall test coverage information is based on the aggregating of the individual test coverage information for the software modules.