diff --git a/src/ifcopenshell-python/test/test_create_shape.py b/src/ifcopenshell-python/test/test_create_shape.py
index 57ffa0b78b..46d02c5699 100644
--- a/src/ifcopenshell-python/test/test_create_shape.py
+++ b/src/ifcopenshell-python/test/test_create_shape.py
@@ -1,3 +1,8 @@
+import functools
+import itertools
+import multiprocessing
+import operator
+import os
 import pytest
 import test.bootstrap
 import ifcopenshell
@@ -12,6 +17,7 @@ import ifcopenshell.util.shape
 from ifcopenshell.util.shape_builder import ShapeBuilder
 from typing import get_args
 
+fn = os.path.join(os.path.dirname(__file__), "fixtures/ColumnPSetsOfSets.ifc")
 
 class TestGeomSettings:
     def test_settings(self):
@@ -185,6 +191,28 @@ class TestAssignObject:
         assert len(set(vs)) == 12
 
 
+def test_iterator():
+    # just test some permutations of invocation
+    settings = ifcopenshell.geom.settings()
+    file_or_filename = [fn, ifcopenshell.open(fn)]
+    with_or_without_threads = [[], [multiprocessing.cpu_count()]]
+    includes = [
+        {},
+        {'include': ['IfcColumn']},
+        {'include': [file_or_filename[1].by_type('IfcColumn')[0]]},
+    ]
+    for args in itertools.product(file_or_filename, with_or_without_threads, includes):
+        kwargs = functools.reduce(operator.or_, (a for a in args if isinstance(a, dict)))
+        pargs = []
+        for a in (_ for _ in args if not isinstance(_, dict)):
+            if isinstance(a, list):
+                pargs.extend(a)
+            else:
+                pargs.append(a)
+        iterator = ifcopenshell.geom.iterator(settings, *pargs, **kwargs)
+        assert iterator.initialize()
+
+
 if __name__ == "__main__":
     import pytest