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+      - same-origin
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+      - nginx/1.27.3
+      Vary:
+      - origin
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+    status:
+      code: 200
+      message: OK
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+      Accept:
+      - '*/*'
+      Accept-Encoding:
+      - gzip, deflate, br
+      Authorization:
+      - Token 171be5abaf41e7856b423ad513df1ef8f867ff48
+      Connection:
+      - keep-alive
+      User-Agent:
+      - python-requests/2.32.2
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+    uri: http://localhost:8001/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48/versions
+  response:
+    body:
+      string: '{"count":4,"next":null,"previous":null,"results":[{"url":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48/versions/4","version":4,"objectType":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48","status":"draft","jsonSchema":{"$id":"https://example.com/person.schema.json","type":"object","title":"Person","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"age":{"type":"integer","minimum":18},"bsn":{"type":"string"},"name":{"type":"object","properties":{"last.name":{"type":"string"}}},"nested":{"type":"object","properties":{"unrelated":{"type":"string"},"submission_payment_amount":{"type":"number","multipleOf":0.01}}},"submission_date":{"type":"string","format":"date-time"},"submission_csv_url":{"type":"string","format":"uri"},"submission_pdf_url":{"type":"string","format":"uri"},"submission_payment_completed":{"type":"boolean"},"submission_payment_public_ids":{"type":"array"}}},"createdAt":"2024-11-25","modifiedAt":"2024-11-25","publishedAt":"2024-11-25"},{"url":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48/versions/3","version":3,"objectType":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48","status":"published","jsonSchema":{"$id":"https://example.com/person.schema.json","type":"object","title":"Person","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"age":{"type":"integer","minimum":18},"name":{"type":"object","properties":{"last.name":{"type":"string"}}},"nested":{"type":"object","properties":{"unrelated":{"type":"string"},"submission_payment_amount":{"type":"number","multipleOf":0.01}}},"submission_date":{"type":"string","format":"date-time"},"submission_csv_url":{"type":"string","format":"uri"},"submission_pdf_url":{"type":"string","format":"uri"},"submission_payment_completed":{"type":"boolean"},"submission_payment_public_ids":{"type":"array"}}},"createdAt":"2024-02-08","modifiedAt":"2024-11-25","publishedAt":"2024-11-25"},{"url":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48/versions/2","version":2,"objectType":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48","status":"published","jsonSchema":{"$id":"https://example.com/person.schema.json","type":"object","title":"Person","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"age":{"type":"integer","minimum":18,"description":"Age
+        in years which must be equal to or greater than 18."},"lastName":{"type":"string","description":"The
+        person''s last name."},"firstName":{"type":"string","description":"The person''s
+        first name."}}},"createdAt":"2024-02-08","modifiedAt":"2024-02-08","publishedAt":"2024-02-08"},{"url":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48/versions/1","version":1,"objectType":"http://objecttypes-web:8000/api/v2/objecttypes/8e46e0a5-b1b4-449b-b9e9-fa3cea655f48","status":"published","jsonSchema":{"$id":"https://example.com/person.schema.json","type":"object","title":"Person","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"age":{"type":"integer","minimum":0,"description":"Age
+        in years which must be equal to or greater than zero."},"lastName":{"type":"string","description":"The
+        person''s last name."},"firstName":{"type":"string","description":"The person''s
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+      - same-origin
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+      - Tue, 11 Mar 2025 14:34:29 GMT
+      Referrer-Policy:
+      - same-origin
+      Server:
+      - nginx/1.27.3
+      Vary:
+      - origin
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
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+      code: 200
+      message: OK
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diff --git a/src/openforms/forms/tests/test_import_export.py b/src/openforms/forms/tests/test_import_export.py
index ed8a71ab2d..ff10c21379 100644
--- a/src/openforms/forms/tests/test_import_export.py
+++ b/src/openforms/forms/tests/test_import_export.py
@@ -1396,6 +1396,114 @@ def test_import_form_with_objecttype_uuid_objects_api_registration_backend(self)
             "8e46e0a5-b1b4-449b-b9e9-fa3cea655f48",
         )
 
+    def test_import_form_with_objects_registration_backend_no_version_and_no_variables_mapping(
+        self,
+    ):
+        resources = {
+            "forms": [
+                {
+                    "active": True,
+                    "name": "Test Form 1",
+                    "internal_name": "Test Form Internal 1",
+                    "slug": "objects-api-no-group",
+                    "uuid": "324cadce-a627-4e3f-b117-37ca232f16b2",
+                    "registration_backends": [
+                        {
+                            "key": "test-backend",
+                            "name": "Test backend",
+                            "backend": "objects_api",
+                            "options": {
+                                "objects_api_group": ObjectsAPIGroupConfigFactory.create(
+                                    for_test_docker_compose=True
+                                ).pk,
+                                "objecttype": "8e46e0a5-b1b4-449b-b9e9-fa3cea655f48",
+                                "objecttype_version": 1,
+                            },
+                        }
+                    ],
+                }
+            ]
+        }
+
+        with zipfile.ZipFile(self.filepath, "w") as zip_file:
+            for name, data in resources.items():
+                zip_file.writestr(f"{name}.json", json.dumps(data))
+
+        call_command("import", import_file=self.filepath)
+
+        registration_backend = FormRegistrationBackend.objects.get(key="test-backend")
+
+        # By default, a new Objects API registration is set to version 2.
+        # If a v2 Objects API registrations doesn't provide a `variables_mapping` it's
+        # set to empty array.
+        self.assertEqual(registration_backend.options["version"], 2)
+        self.assertEqual(registration_backend.options["variables_mapping"], [])
+
+    def test_import_form_with_objects_registration_backend_without_variables_mapping(
+        self,
+    ):
+        resources = {
+            "forms": [
+                {
+                    "active": True,
+                    "name": "Test Form 1",
+                    "internal_name": "Test Form Internal 1",
+                    "slug": "objects-api-no-group",
+                    "uuid": "324cadce-a627-4e3f-b117-37ca232f16b2",
+                    "registration_backends": [
+                        {
+                            "key": "test-backend-v1",
+                            "name": "Test backend",
+                            "backend": "objects_api",
+                            "options": {
+                                "objects_api_group": ObjectsAPIGroupConfigFactory.create(
+                                    for_test_docker_compose=True
+                                ).pk,
+                                "version": 1,
+                                "objecttype": "8e46e0a5-b1b4-449b-b9e9-fa3cea655f48",
+                                "objecttype_version": 1,
+                            },
+                        },
+                        {
+                            "key": "test-backend-v2",
+                            "name": "Test backend",
+                            "backend": "objects_api",
+                            "options": {
+                                "objects_api_group": ObjectsAPIGroupConfigFactory.create(
+                                    for_test_docker_compose=True
+                                ).pk,
+                                "version": 2,
+                                "objecttype": "8e46e0a5-b1b4-449b-b9e9-fa3cea655f48",
+                                "objecttype_version": 1,
+                            },
+                        },
+                    ],
+                }
+            ]
+        }
+
+        with zipfile.ZipFile(self.filepath, "w") as zip_file:
+            for name, data in resources.items():
+                zip_file.writestr(f"{name}.json", json.dumps(data))
+
+        call_command("import", import_file=self.filepath)
+
+        registration_backend_v1 = FormRegistrationBackend.objects.get(
+            key="test-backend-v1"
+        )
+        registration_backend_v2 = FormRegistrationBackend.objects.get(
+            key="test-backend-v2"
+        )
+
+        # Only when a Objects API registration is v2, has the `variables_mapping` a
+        # default value.
+        self.assertEqual(registration_backend_v1.options["version"], 1)
+        self.assertNotIn("variables_mapping", registration_backend_v1.options)
+
+        self.assertEqual(registration_backend_v2.options["version"], 2)
+        self.assertIn("variables_mapping", registration_backend_v2.options)
+        self.assertEqual(registration_backend_v2.options["variables_mapping"], [])
+
 
 class ImportZGWAPITests(TempdirMixin, OFVCRMixin, TestCase):
     """This test case requires the Open Zaak Docker Compose to be running.