Have 3 amigos.
Always have a 3 amigos meeting.The 3 Amigos (in case you don't know)is a meeting where the Business Analyst presents requirements and test scenarios (collectively called a “feature”) for review by a member of the development team and a member of the quality assurance team. This will help to build an shared understanding between them.
Make sure your develop the feature as per this shared understanding and cover these test scenarios as part of unit testing up to possible extent.
In fact I found this very helpful to have open conversation between Developer & tester to decide which part to cover on unit level and which to cover in integration/end to end testing.