diff --git a/src/ifc5d/ifc5d/qto.py b/src/ifc5d/ifc5d/qto.py
index 14088ed86e..8beabe02f4 100644
--- a/src/ifc5d/ifc5d/qto.py
+++ b/src/ifc5d/ifc5d/qto.py
@@ -76,7 +76,7 @@ class SI2ProjectUnitConverter:
             "IfcLengthMeasure": "METRE",
             "IfcMassMeasure": "GRAM",
             "IfcTimeMeasure": "SECOND",
-            "IfcVolumeMeasure": "CUBIE_METRE",
+            "IfcVolumeMeasure": "CUBIC_METRE",
         }
 
     def convert(self, value, measure):
diff --git a/src/ifcopenshell-python/test/util/test_unit.py b/src/ifcopenshell-python/test/util/test_unit.py
index 52a6a93178..0852019976 100644
--- a/src/ifcopenshell-python/test/util/test_unit.py
+++ b/src/ifcopenshell-python/test/util/test_unit.py
@@ -16,13 +16,22 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
-import pytest
 import test.bootstrap
 import ifcopenshell.api
 import ifcopenshell.util.unit as subject
 from math import pi
 
 
+class TestConvert(test.bootstrap.IFC4):
+    def test_run(self):
+        assert subject.convert(1, None, "METRE", None, "METRE") == 1
+        assert subject.convert(1, None, "METRE", "MILLI", "METRE") == 1000
+        assert subject.convert(1000, "MILLI", "METRE", None, "METRE") == 1
+        assert subject.convert(1, None, "SQUARE_METRE", None, "SQUARE_METRE") == 1
+        assert subject.convert(1, None, "SQUARE_METRE", "MILLI", "SQUARE_METRE") == 1000000
+        assert subject.convert(1, None, "CUBIC_METRE", "MILLI", "CUBIC_METRE") == 1000000000
+
+
 class TestCalculateUnitScale(test.bootstrap.IFC4):
     def test_prefix_and_conversion_based_units_are_considered(self):
         ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcProject")