diff --git a/pyright.pyproject.toml b/pyright.pyproject.toml
index 94b05b008d..5bae5c2f40 100644
--- a/pyright.pyproject.toml
+++ b/pyright.pyproject.toml
@@ -40,6 +40,7 @@ include = [
     # Registrations
     "src/openforms/registrations/tasks.py",
     "src/openforms/registrations/contrib/email/",
+    "src/openforms/registrations/contrib/json_dump/",
     "src/openforms/registrations/contrib/stuf_zds/options.py",
     "src/openforms/registrations/contrib/stuf_zds/plugin.py",
     "src/openforms/registrations/contrib/stuf_zds/typing.py",
diff --git a/src/openforms/js/components/admin/form_design/registrations/json_dump/fields/Variables.js b/src/openforms/js/components/admin/form_design/registrations/json_dump/fields/Variables.js
index 2d934a3ced..48a04b570f 100644
--- a/src/openforms/js/components/admin/form_design/registrations/json_dump/fields/Variables.js
+++ b/src/openforms/js/components/admin/form_design/registrations/json_dump/fields/Variables.js
@@ -32,8 +32,8 @@ const Variables = () => {
           {...fieldProps}
           isMulti
           required
-          closeMenuOnSelect={false}
-          includeStaticVariables={true}
+          closeMenuOnSelect
+          includeStaticVariables
         />
       </Field>
     </FormRow>
diff --git a/src/openforms/registrations/contrib/json_dump/plugin.py b/src/openforms/registrations/contrib/json_dump/plugin.py
index 1117cf13a3..63a8b4bb2f 100644
--- a/src/openforms/registrations/contrib/json_dump/plugin.py
+++ b/src/openforms/registrations/contrib/json_dump/plugin.py
@@ -1,5 +1,6 @@
 import base64
 import json
+from typing import TypedDict
 
 from django.core.exceptions import SuspiciousOperation
 from django.core.serializers.json import DjangoJSONEncoder
@@ -21,6 +22,10 @@
 from .config import JSONDumpOptions, JSONDumpOptionsSerializer
 
 
+class JSONDumpResult(TypedDict):
+    api_response: JSONObject
+
+
 @register("json_dump")
 class JSONDumpRegistration(BasePlugin):
     verbose_name = _("JSON dump registration")
@@ -28,7 +33,7 @@ class JSONDumpRegistration(BasePlugin):
 
     def register_submission(
         self, submission: Submission, options: JSONDumpOptions
-    ) -> dict:
+    ) -> JSONDumpResult:
         state = submission.load_submission_value_variables_state()
 
         all_values: JSONObject = {
@@ -62,17 +67,14 @@ def register_submission(
         # Send to the service
         data = json.dumps({"values": values, "schema": schema}, cls=DjangoJSONEncoder)
         service = options["service"]
-        submission.registration_result = result = {}
         with build_client(service) as client:
             if ".." in (path := options["path"]):
                 raise SuspiciousOperation("Possible path traversal detected")
 
-            res = client.post(path, json=data)
-            res.raise_for_status()
-
-            result["api_response"] = res.json()
+            result = client.post(path, json=data)
+            result.raise_for_status()
 
-        return result
+        return {"api_response": result.json()}
 
     def check_config(self) -> None:
         # Config checks are not really relevant for this plugin right now