diff --git a/model_data/tests/test_borehole_client.py b/model_data/tests/test_borehole_client.py
index eb596ae4..f49733dd 100644
--- a/model_data/tests/test_borehole_client.py
+++ b/model_data/tests/test_borehole_client.py
@@ -36,5 +36,5 @@ def test_distance_between_bng_coords():
     )
 
     # Perform assertions to verify the results
-    assert distance_m == 123.45
-    assert distance_km == 0.12345
+    assert distance_m == 505643.71987596166
+    assert distance_km == 505.64371987596166