diff --git a/api/tests/opentrons/hardware_control/test_ot3_api.py b/api/tests/opentrons/hardware_control/test_ot3_api.py
index 00677d1df2e..f3ee9ea1903 100644
--- a/api/tests/opentrons/hardware_control/test_ot3_api.py
+++ b/api/tests/opentrons/hardware_control/test_ot3_api.py
@@ -14,7 +14,7 @@
     TypedDict,
 )
 from typing_extensions import Literal
-from math import copysign
+from math import copysign, isclose
 import pytest
 import types
 from decoy import Decoy
@@ -952,13 +952,13 @@ async def test_liquid_probe_plunger_moves(
             expected_plunger_move = (
                 min(p_travel_required_for_z, p_working_mm) + p_impulse_mm
             )
-            assert plunger_move == expected_plunger_move
+            assert isclose(plunger_move, expected_plunger_move)
 
             mount_travel_time = plunger_move / config.plunger_speed
             mount_travel_distance = mount_speed * mount_travel_time
             max_z_distance -= mount_travel_distance
 
-            move_mount_z_time = (max_z_distance + probe_safe_reset_mm) / mount_speed
+            move_mount_z_time = (max_z_distance + probe_pass_z_offset_mm) / mount_speed
             p_travel_required_for_z = move_mount_z_time * config.plunger_speed