diff --git a/src/py/mat3ra/made/tools/modify.py b/src/py/mat3ra/made/tools/modify.py
index 1d3b7fcf..19b50183 100644
--- a/src/py/mat3ra/made/tools/modify.py
+++ b/src/py/mat3ra/made/tools/modify.py
@@ -470,7 +470,7 @@ def displace_interface(
     interface: Material,
     displacement: List[float],
     label: InterfacePartsEnum = InterfacePartsEnum.FILM,
-    use_cartesian_coordinates=False,
+    use_cartesian_coordinates=True,
 ) -> Material:
     """
     Displace atoms in an interface along a certain direction.
diff --git a/tests/py/unit/test_tools_modify.py b/tests/py/unit/test_tools_modify.py
index 3dc9cc8c..7b8c9f7e 100644
--- a/tests/py/unit/test_tools_modify.py
+++ b/tests/py/unit/test_tools_modify.py
@@ -184,6 +184,8 @@ def test_displace_interface():
         {"id": 4, "value": [0.766666667, 0.866666667, 0.911447347]},
     ]
     expected_labels = GRAPHENE_NICKEL_INTERFACE["basis"]["labels"]
-    displaced_material = displace_interface(material, [0.1, 0.2, 0.3], InterfacePartsEnum.FILM)
+    displaced_material = displace_interface(
+        material, [0.1, 0.2, 0.3], InterfacePartsEnum.FILM, use_cartesian_coordinates=False
+    )
     assertion_utils.assert_deep_almost_equal(expected_coordinates, displaced_material.basis.coordinates.to_dict())
     assertion_utils.assert_deep_almost_equal(expected_labels, displaced_material.basis.labels.to_dict())