Running make check-pytests in the tests folder fails in jsonwalker.py

PYTHONPATH=../../src/util VALGRIND="" python 
../../src/tests/jsonwalker.py -d ../../src/tests/au_dict.json \
                -i au.log
Traceback (most recent call last):
  File "../../src/tests/jsonwalker.py", line 107, in <module>
    defaults = cjson.decode(f.read())
cjson.DecodeError: expecting ',' or '}' at position 529
Makefile:727: recipe for target 'check-pytests' failed
make: *** [check-pytests] Error 1