Worked on refining the DynamoRevit test suite to improve regression reliability following model upgrades. Focused on updating the DynamoAllSelectionNodeTests_WithPreSelectedEntities test within the DynamoDS/DynamoRevit repository, ensuring that element-count assertions accurately reflected changes after mullion levels were adjusted to match host curtain wall geometry. Used C# and the Revit API to enhance test accuracy, specifically asserting the correct count of 83 elements at level 2. Emphasized software testing and unit testing practices to reduce false failures and streamline validation cycles, ultimately increasing confidence in release quality by maintaining robust regression coverage for upgraded architectural models.