diff --git a/KanbanTests/MarqueeRenderCostTests.swift b/KanbanTests/MarqueeRenderCostTests.swift
index 7c280c7..2cd1dfc 100644
--- a/KanbanTests/MarqueeRenderCostTests.swift
+++ b/KanbanTests/MarqueeRenderCostTests.swift
@@ -172,14 +172,14 @@ struct MarqueeRenderCostTests {
         let swept = Set((0..<10).map { ItemID(rawValue: cardName(1, $0)) })
 
         // First select: the legitimate change. Not measured here.
-        store.select(swept, in: .board, anchor: nil, head: nil)
+        store.select(swept, in: .board, anchor: nil, head: nil, defaultsSoleMember: false)
         board.settle()
 
         let samples = 30
         BoardRenderMetrics.reset()
         let t0 = CACurrentMediaTime()
         for _ in 0..<samples {
-            store.select(swept, in: .board, anchor: nil, head: nil)
+            store.select(swept, in: .board, anchor: nil, head: nil, defaultsSoleMember: false)
             board.settleOnce()
         }
         let elapsed = (CACurrentMediaTime() - t0) * 1000
@@ -210,14 +210,14 @@ struct MarqueeRenderCostTests {
 
         let samples = 20
         var swept: Set<ItemID> = [ItemID(rawValue: cardName(1, 0))]
-        store.select(swept, in: .board, anchor: nil, head: nil)
+        store.select(swept, in: .board, anchor: nil, head: nil, defaultsSoleMember: false)
         board.settle()
 
         BoardRenderMetrics.reset()
         let t0 = CACurrentMediaTime()
         for i in 1...samples {
             swept.insert(ItemID(rawValue: cardName(1, i % cardsPerLane)))
-            store.select(swept, in: .board, anchor: nil, head: nil)
+            store.select(swept, in: .board, anchor: nil, head: nil, defaultsSoleMember: false)
             board.settleOnce()
         }
         let elapsed = (CACurrentMediaTime() - t0) * 1000
@@ -242,8 +242,8 @@ struct MarqueeRenderCostTests {
         //
         // That is the shape the fix bought: the cost follows what the user has selected, not what the
         // board holds. Before it, every sample re-ran all \(laneCount * cardsPerLane) faces on the
-        // board whatever the band had swept — 3,600 bodies over this stream, an order of magnitude
-        // over the budget below and independent of the selection entirely.
+        // board whatever the band had swept — 3,600 bodies over this stream, five times the budget
+        // below and independent of the selection entirely.
         //
         // The ×3 is `BoardRenderPerformanceTests`' slack rationale: SwiftUI evaluates a body more
         // than once per update, so a changed face is worth more than one count. Measured at exactly