fix test_parse test

[max-sixty]

I don't think this test was passing for a while?

[codecov-io]

Codecov Report

Merging #126 into master will decrease coverage by 44.76%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##           master     #126       +/-   ##
===========================================
- Coverage    75.7%   30.93%   -44.77%     
===========================================
  Files           8        8               
  Lines        1626     1629        +3     
===========================================
- Hits         1231      504      -727     
- Misses        395     1125      +730

Impacted Files	Coverage Δ
pandas_gbq/tests/test_gbq.py	26.79% <0%> (-56.86%)	⬇️
pandas_gbq/gbq.py	20.56% <0%> (-55.8%)	⬇️
pandas_gbq/_load.py	62.5% <0%> (-35%)	⬇️

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[max-sixty]

This leaves other broken tests from #125, but at least fixes one