Backport/backport 383 to 2.x units fix

[jovancacvetkovic]

Description

fixes unit tests

Issues Resolved

#416

Check List

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[opensearch-trigger-bot]

The backport to 2.6 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.6 2.6
# Navigate to the new working tree
cd .worktrees/backport-2.6
# Create a new branch
git switch --create backport/backport-425-to-2.6
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 280a981a28b0f3636a24167be353780c962feb21
# Push it to GitHub
git push --set-upstream origin backport/backport-425-to-2.6
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.6

Then, create a pull request where the base branch is 2.6 and the compare/head branch is backport/backport-425-to-2.6.