Reading package lists...
Building dependency tree...
Reading state information...
Calculating upgrade...
The following packages have been kept back:
  su-dummy-c
The following packages will be upgraded:
  su-dummy-a su-dummy-b
2 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Inst su-dummy-b [1.0] (2.0 su-fixture:su-repo [all])
Inst su-dummy-a [1.0] (2.0 su-fixture:su-repo [all])
Conf su-dummy-b (2.0 su-fixture:su-repo [all])
Conf su-dummy-a (2.0 su-fixture:su-repo [all])