  As part of formative and summative assessments in programming courses,
students work on developing programming artifacts following a given
specification. These artifacts are evaluated by the teachers. At the end of
this evaluation, the students receive feedback and marks. Providing feedback on
programming artifacts is time demanding and could make feedback to arrive too
late for it to be effective for the students' learning. We propose to combine
software testing with peer feedback which has been praised for offering a
timely and effective learning activity with program testing.
  In this paper we report on the development of a Web platform for peer
feedback on programming artifacts through program testing. We discuss the
development process of our peer-testing platform informed by teachers and
students.
