52_ctdb_fetch.sh looks like a copy of 51_ctdb_bench.sh, but the output formats of ctdb_fetch and ctdb_bench are quite different. As a consequence this test always failes.
Sorry, I did not notice this bug report earlier.
I have already fixed this independently.
A fixed 52_ctdb_test.sh has gone into 1.0.88.
Please re-open if bug persists.