diff --git a/Assets/Tests/EditMode/Enemies/GroundNavigatorLogicTests.cs b/Assets/Tests/EditMode/Enemies/GroundNavigatorLogicTests.cs
index 7d459053..0ef1ba9e 100644
--- a/Assets/Tests/EditMode/Enemies/GroundNavigatorLogicTests.cs
+++ b/Assets/Tests/EditMode/Enemies/GroundNavigatorLogicTests.cs
@@ -10,9 +10,11 @@ namespace BaseGames.Tests.EditMode.Enemies
         public void Arrived_WhenWithinStopDistance()
             => Assert.IsTrue(GroundNavigator.Arrived(1.0f, 1.1f, 0.2f));
 
+        // 边界含等号。刻意选二进制可精确表示的值(1.25-1.0 恰为 0.25)，
+        // 否则如 1.2f-1.0f=0.20000005 会因浮点误差略大于 0.2f，测的就不是边界语义而是浮点噪声。
         [Test]
         public void Arrived_ExactlyAtStopDistance_True()
-            => Assert.IsTrue(GroundNavigator.Arrived(1.0f, 1.2f, 0.2f));
+            => Assert.IsTrue(GroundNavigator.Arrived(1.0f, 1.25f, 0.25f));
 
         [Test]
         public void NotArrived_WhenOutsideStopDistance()