[bugfix] Fix crash when `--distribute` option is applied to a run-only test

[vkarak]

Closes #3074.

[codecov[bot]]

Codecov Report

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

Comparison is base (5ca9de6) 86.61% compared to head (c685a46) 86.62%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3081 +/- ## ======================================== Coverage 86.61% 86.62% ======================================== Files 61 61 Lines 12035 12035 ======================================== + Hits 10424 10425 +1 + Misses 1611 1610 -1 ```

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