Fix test for new requests version

[tpazderka]

• Any changes relevant to users are recorded in the CHANGELOG.md.
• The documentation has been updated, if necessary.
• New code is annotated.
• Changes are covered by tests.

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[codecov-commenter]

Codecov Report

Merging #841 (6fa769a) into master (26ea512) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #841   +/-   ##
=======================================
  Coverage   63.82%   63.82%           
=======================================
  Files          64       64           
  Lines       11880    11880           
  Branches     2158     2158           
=======================================
  Hits         7583     7583           
  Misses       3694     3694           
  Partials      603      603           

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[schlenk]

LGTM.