LAL tools ValueTest failing on non-x86_64 Linux

The test/tools/ValueTest is failing on linux-aarch64 (qemu emulated):

==========================================
   LAL 7.2.0: test/tools/test-suite.log
==========================================

# TOTAL: 16
# PASS:  15
# SKIP:  0
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: ValueTest
===============

Testing CHAR...FAIL ValueTest (exit status: 1)

This test was introduced in a6f4eb28 by @jolien-creighton, I'm hoping he can understand what might be going on.

The build log for this can be seen here.