diff --git a/tests/devices/i22/test_dcm.py b/tests/devices/i22/test_dcm.py
index 443479ca86..ea6af11a88 100644
--- a/tests/devices/i22/test_dcm.py
+++ b/tests/devices/i22/test_dcm.py
@@ -220,7 +220,7 @@ async def test_configuration(dcm: DoubleCrystalMonochromator):
                 "alarm_severity": ANY,
             },
             "dcm-crystal_2_d_spacing": {
-                "value": 3.13475,
+                "value": 0.31356,
                 "timestamp": ANY,
                 "alarm_severity": ANY,
             },
@@ -245,7 +245,7 @@ async def test_configuration(dcm: DoubleCrystalMonochromator):
                 "alarm_severity": ANY,
             },
             "dcm-crystal_1_d_spacing": {
-                "value": 3.13475,
+                "value": 0.31356,
                 "timestamp": ANY,
                 "alarm_severity": ANY,
             },