Without these patches, only two tests fail. Both fixes are fairly trivial. According to Olly the behviour of xapian 1.3.4 of throwing an exception rather than optimising away a giant term is a bug, but it is easy to work around since we aren't really interested in giant terms per se in the test, just long query strings. To test this on Debian apt-get install -t experimental libxapian-dev XAPIAN_CONFIG=xapian-config-1.3 ./configure make test Currently the libxapian-dev packages are not coinstallable (although the actual libraries are). But downgrading back to stretch version worked fine for me.