Hi Andreas,
I've made testsuite for apbs (I took its own tests "(cd tests; python apbs_tester.py -c test_cases.cfg)", installed them to usr/share/apbs, and made sure that they work when installed).
Regarding python interface, which is used by pdb2pqr, it is not present in source archive.
apbs source releases are available on github, but they contain both apbs and pdb2pqr (probably because they both are developed in the same repository)
https://github.com/Electrostatics/apbs-pdb2pqr/releasesOn SourceForge there are 2 versions of apbs (1.4.1 and 1.4.2), but they both don't have source archive. Version 1.4.0 is old.