diff --git a/client/test/player_idle_support_test.gd b/client/test/player_idle_support_test.gd
index 001fa48..2221afa 100644
--- a/client/test/player_idle_support_test.gd
+++ b/client/test/player_idle_support_test.gd
@@ -12,7 +12,12 @@ func test_idle_support_is_stable_on_flat_floor_without_wall_contacts() -> void:
 
 func test_idle_support_is_stable_false_when_floor_is_not_flat_enough() -> void:
 	var slide_normals: Array[Vector3] = [Vector3.UP]
-	var tilted_floor: Vector3 = Vector3(0.07, 0.9975, 0.0).normalized()
+	# Must be steeper than [member STABLE_IDLE_FLOOR_MIN_UP_DOT] (0.998) *and* below
+	# [member IDLE_SLOPE_STABLE_MIN_UP_DOT] (0.88), or the ramp short-circuit treats support as stable.
+	var tilted_floor: Vector3 = Vector3(0.5, 0.82, 0.0).normalized()
+	assert_that(tilted_floor.dot(Vector3.UP)).is_less(
+		PLAYER_SCRIPT.get("IDLE_SLOPE_STABLE_MIN_UP_DOT")
+	)
 	var stable: bool = PLAYER_SCRIPT.idle_support_is_stable(true, tilted_floor, slide_normals, 0)
 	assert_that(stable).is_false()
 
@@ -40,8 +45,13 @@ func test_idle_support_is_stable_true_when_loose_ticks_and_ridged_but_floor_stil
 
 func test_idle_support_is_stable_false_when_loose_ticks_and_ridged_and_shallow_floor() -> void:
 	var slide_normals: Array[Vector3] = [Vector3.UP, Vector3(1.0, 0.0, 0.0)]
-	var floor_n: Vector3 = Vector3(0.35, 0.88, 0.0).normalized()
-	assert_that(floor_n.dot(Vector3.UP) < 0.968).is_true()
+	# Normal must be outside the ramp-stable band [IDLE_SLOPE_STABLE_MIN_UP_DOT, IDLE_RIM) or
+	# `idle_ridged_stair_lip_only` is false and the ramp short-circuit returns stable. Use a tread
+	# tilt above the rim dot but still below the ridged hold threshold (0.992).
+	var floor_n: Vector3 = Vector3(0.14, 0.98, 0.0).normalized()
+	var up_dot: float = floor_n.dot(Vector3.UP)
+	assert_that(up_dot).is_greater_equal(PLAYER_SCRIPT.get("IDLE_RIM_MIN_FLOOR_UP_DOT") as float)
+	assert_that(up_dot).is_less(PLAYER_SCRIPT.get("STABLE_IDLE_FLOOR_MIN_UP_DOT") as float)
 	var stable: bool = PLAYER_SCRIPT.idle_support_is_stable(true, floor_n, slide_normals, 12)
 	assert_that(stable).is_false()
 
diff --git a/server/NeonSprawl.Server.Tests/Game/PositionState/MoveCommandApiTests.cs b/server/NeonSprawl.Server.Tests/Game/PositionState/MoveCommandApiTests.cs
index 4f4ab9a..643c1fa 100644
--- a/server/NeonSprawl.Server.Tests/Game/PositionState/MoveCommandApiTests.cs
+++ b/server/NeonSprawl.Server.Tests/Game/PositionState/MoveCommandApiTests.cs
@@ -115,7 +115,11 @@ public class MoveCommandApiTests
         {
             b.ConfigureTestServices(services =>
             {
-                services.PostConfigure<GamePositionOptions>(o => o.MovementValidation.MaxHorizontalStep = 1.0);
+                services.PostConfigure<GamePositionOptions>(o =>
+                {
+                    o.MovementValidation.HorizontalStepEnabled = true;
+                    o.MovementValidation.MaxHorizontalStep = 1.0;
+                });
             });
         });
         var client = factory.CreateClient();