There should only be four tests, yet the pre-release Test Result page shows eight of them with four failing:
rostest-tests_heightmap_node_hz.xml
rostest-tests_heightmap_nodelet_hz.xml
rosunit-heightmap_node_clear_hz_test.xml
rosunit-heightmap_nodelet_clear_hz_test.xml
rosunit-heightmap_nodelet_obstacles_hz_test.xml
rosunit-heightmap_node_obstacles_hz_test.xml