diff --git a/Projects/UOContent.Tests/Tests/Engines/Pathing/BitmapAStarAlgorithmTests.cs b/Projects/UOContent.Tests/Tests/Engines/Pathing/BitmapAStarAlgorithmTests.cs
index 20d729c0f..667995278 100644
--- a/Projects/UOContent.Tests/Tests/Engines/Pathing/BitmapAStarAlgorithmTests.cs
+++ b/Projects/UOContent.Tests/Tests/Engines/Pathing/BitmapAStarAlgorithmTests.cs
@@ -371,6 +371,9 @@ public class BitmapAStarAlgorithmTests
     {
         StepCache.Instance.Clear();
         StepCache.Instance.MissPromotionThreshold = 2;
+        // Pinned: promotion needs both Finds inside the window, and Linux's coarse TickCount can
+        // step several ms between two back-to-back Finds.
+        StepCache.Instance.MissPromotionWindowMs = 30_000;
 
         var map = Map.Maps[1];
         var stub = new DefaultWalkerStub();
diff --git a/Projects/UOContent.Tests/Tests/Engines/Pathing/StepCacheLifecycleTests.cs b/Projects/UOContent.Tests/Tests/Engines/Pathing/StepCacheLifecycleTests.cs
index 7b630173c..b4257f112 100644
--- a/Projects/UOContent.Tests/Tests/Engines/Pathing/StepCacheLifecycleTests.cs
+++ b/Projects/UOContent.Tests/Tests/Engines/Pathing/StepCacheLifecycleTests.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Reflection;
 using System.Threading;
@@ -14,8 +15,14 @@ namespace Server.Tests.Pathfinding;
 /// layers, and LRU eviction.
 /// </summary>
 [Collection("Sequential Pathfinding Tests")]
-public class StepCacheLifecycleTests
+public class StepCacheLifecycleTests : IDisposable
 {
+    // The window is a knob on the singleton and Clear() leaves it alone, so a test that narrows
+    // it would otherwise leak the narrow window into every later test in the collection.
+    private readonly uint _savedWindowMs = StepCache.Instance.MissPromotionWindowMs;
+
+    public void Dispose() => StepCache.Instance.MissPromotionWindowMs = _savedWindowMs;
+
     /// <summary>Resets to a known state and returns the singleton.</summary>
     private static StepCache FreshCache(int promotionThreshold)
     {