improve test coverage

[aaristov]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 99.01961% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.55%. Comparing base (4daebe9) to head (48b6997).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/tests/test_export.py	99.01%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #3       +/-   ##
===========================================
+ Coverage   51.89%   96.55%   +44.65%     
===========================================
  Files           3        3               
  Lines          79      174       +95     
  Branches        6        7        +1     
===========================================
+ Hits           41      168      +127     
+ Misses         36        4       -32     
  Partials        2        2               

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.