test: add test on multiple instances

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 82.95%. Comparing base (1fafa01) to head (c81df65). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/storage/driver/driver.go	0.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #529 +/- ## ========================================== - Coverage 83.08% 82.95% -0.13% ========================================== Files 118 118 Lines 6917 6924 +7 ========================================== - Hits 5747 5744 -3 - Misses 889 898 +9 - Partials 281 282 +1 ```

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