Fix checkpayment tests

[aliel]

tests was hanging because async mocks was not correctly configure

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 64.82%. Comparing base (dd11d1b) to head (a5a7e7b). :warning: Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #847      +/-   ##
==========================================
- Coverage   64.85%   64.82%   -0.03%     
==========================================
  Files          88       88              
  Lines        8163     8159       -4     
  Branches      734      734              
==========================================
- Hits         5294     5289       -5     
- Misses       2639     2641       +2     
+ Partials      230      229       -1     

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