diff --git a/src/openforms/registrations/contrib/json/tests/__init__.py b/src/openforms/registrations/contrib/json/tests/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/src/openforms/registrations/contrib/json/tests/test_backend.py b/src/openforms/registrations/contrib/json/tests/test_backend.py
new file mode 100644
index 0000000000..d27eb55bb4
--- /dev/null
+++ b/src/openforms/registrations/contrib/json/tests/test_backend.py
@@ -0,0 +1,57 @@
+from django.test import TestCase
+
+from openforms.appointments.contrib.qmatic.tests.factories import ServiceFactory
+from openforms.submissions.public_references import set_submission_reference
+from openforms.submissions.tests.factories import (
+    SubmissionFactory,
+    SubmissionFileAttachmentFactory,
+)
+
+from ..plugin import JSONRegistration
+
+
+class JSONBackendTests(TestCase):
+    # VCR_TEST_FILES = VCR_TEST_FILES
+
+    def test_submission_with_json_backend(self):
+        submission = SubmissionFactory.from_components(
+            [
+                {"key": "firstName", "type": "textField"},
+                {"key": "lastName", "type": "textfield"},
+                {"key": "file", "type": "file"},
+            ],
+            completed=True,
+            submitted_data={
+                "firstName": "We Are",
+                "lastName": "Checking",
+                "file": [
+                    {
+                        "url": "some://url",
+                        "name": "my-foo.bin",
+                        "type": "application/foo",
+                        "originalName": "my-foo.bin",
+                    }
+                ],
+            },
+            bsn=123456789,
+        )
+
+        submission_file_attachment = SubmissionFileAttachmentFactory.create(
+            form_key="file",
+            submission_step=submission.submissionstep_set.get(),
+            file_name="my-foo.bin",
+            content_type="application/foo",
+            _component_configuration_path="components.2",
+            _component_data_path="file",
+        )
+
+        json_form_options = dict(
+            service=ServiceFactory(),
+            relative_api_endpoint="test",
+            form_variables=["firstName", "lastName", "file", "auth_bsn"],
+        )
+        email_submission = JSONRegistration("json_plugin")
+
+        set_submission_reference(submission)
+
+        email_submission.register_submission(submission, json_form_options)