Fix max file size test failure

[adamtheturtle]

Fixes #837

[codecov]

Codecov Report

Merging #882 (5302e2b) into master (c0447b0) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 5302e2b differs from pull request most recent head d6aa76a. Consider uploading reports for the commit d6aa76a to get more accurate results

@@           Coverage Diff           @@
##           master     #882   +/-   ##
=======================================
  Coverage   99.97%   99.97%           
=======================================
  Files          67       67           
  Lines        4480     4489    +9     
  Branches      278      278           
=======================================
+ Hits         4479     4488    +9     
  Partials        1        1           

Impacted Files	Coverage Δ
tests/mock_vws/test_authorization_header.py	100.00% <ø> (ø)
tests/mock_vws/test_content_length.py	100.00% <ø> (ø)
tests/mock_vws/test_date_header.py	100.00% <ø> (ø)
tests/mock_vws/test_invalid_json.py	100.00% <ø> (ø)
tests/mock_vws/test_unexpected_json.py	100.00% <ø> (ø)
src/mock_vws/_query_validators/exceptions.py	100.00% <100.00%> (ø)
src/mock_vws/_query_validators/image_validators.py	100.00% <100.00%> (ø)
tests/mock_vws/test_query.py	100.00% <100.00%> (ø)
tests/mock_vws/utils/assertions.py	98.73% <100.00%> (ø)

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