Unify Integration test and Unit test environment

## Expected Behavior

## Current Behavior
The current Integration test and Unit test have different environments, especially for pytest versions.

## Steps to reproduce

### Specifications

- Version:
- Platform:
- Subsystem:

## Possible Solution

The issue names no files, tests, entry points, or specific environment differences to investigate. Start by comparing the integration-test and unit-test configuration and their pytest versions; done means both environments use the agreed unified configuration and the relevant test suites pass.

Written by the indexing model from the issue text.