diff --git a/test/tests.py b/test/tests.py
index df0d69d9ac..1a6a85db45 100644
--- a/test/tests.py
+++ b/test/tests.py
@@ -46,6 +46,19 @@ assert f[16].UnitComponent is None
 prop = f.by_type("IfcPropertySingleValue")[0]
 assert prop.NominalValue.wrappedValue in str(prop)
 
+# An instance added to a new file yields the same string
+# representation, except for any instance name identifiers.
+f2 = ifcopenshell.open()
+prop2 = f2.add(prop)
+assert str(prop) == str(prop2).replace(str(prop2.id()), str(prop.id()))
+assert prop2.id() == 1
+
+# A recursively obtained python dictionary representation
+# matches for copied instances as well
+app = f.by_type("IfcApplication")[0]
+assert f2.add(app).get_info(False, True) == app.get_info(False, True)
+assert "Version" in dir(app)
+
 # Some operations on ifcopenshell.entity_instance
 assert f[22].Id == ''
 assert f[22].Addresses is None