Harness status: OK Found 26 tests 25 Pass 1 Fail Pass Slots: Basic. Pass Slots: Basic, elements only. Pass Slots: Slots in closed. Pass Slots: Slots in closed, elements only. Pass Slots: Slots not in a shadow tree. Pass Slots: Slots not in a shadow tree, elements only. Pass Slots: Distributed nodes for Slots not in a shadow tree. Pass Slots: Name matching Pass Slots: No direct host child. Pass Slots: Default Slot. Pass Slots: Slot in Slot does not matter in assignment. Pass Slots: Slot is assigned to another slot Pass Slots: Open > Closed. Pass Slots: Closed > Closed. Pass Slots: Closed > Open. Pass Slots: Complex case: Basi line. Pass Slots: Mutation: appendChild. Pass Slots: Mutation: Change slot= attribute 1. Pass Slots: Mutation: Change slot= attribute 2. Pass Slots: Mutation: Change slot= attribute 3. Pass Slots: Mutation: Remove a child. Pass Slots: Mutation: Add a slot: after. Pass Slots: Mutation: Add a slot: before. Fail Slots: Mutation: Remove a slot. Pass Slots: Mutation: Change slot name= attribute. Pass Slots: Mutation: Change slot slot= attribute.