Fix random collisions causing integration test failures

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.26%. Comparing base (b474e21) to head (63519a0).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #508 +/- ## ======================================= Coverage 64.26% 64.26% ======================================= Files 31 31 Lines 53579 53579 Branches 3905 3905 ======================================= Hits 34430 34430 Misses 18989 18989 Partials 160 160 ``` | [Flag](https://app.codecov.io/gh/dropbox/dropbox-sdk-python/pull/508/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dropbox) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/dropbox/dropbox-sdk-python/pull/508/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dropbox) | `64.17% <ø> (ø)` | | | [unit](https://app.codecov.io/gh/dropbox/dropbox-sdk-python/pull/508/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dropbox) | `63.70% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dropbox#carryforward-flags-in-the-pull-request-comment) to find out more.

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