In reply to Amarjit pradhan:
I believe if you perform command ‘make regress’ both test1 and test2 will run. But keep in mind, if the commands ($IUS, $CHECK) in test1 target are not successully executed (exit status != 0) then Makefile won’t execute the next target (test2). Please check the exit code of $IUS and $CHECK command at test1 target.