Abstract: Program execution coverage is expanded by selectively capturing inputs and execution state information in a production environment after identifying test insufficiencies in a test environment. A program being tested has a non-covered portion and a covered portion. The non-covered portion includes code which is not exercised by a set of tests with regard to an execution coverage, e.g., path coverage, statement coverage, Boolean condition coverage, etc. A non-covered portion identifier identifies the non-covered portion, e.g., by noting breakpoint misses or static analysis constraint solution computational requirements. A trigger inserter inserts a trigger in the program, at a position which permits capture of data which aids exercise of the non-covered portion. A data capturer captures such execution coverage expansion data (“ECE data”) in response to trigger activation.