diff --git a/api/v2.0/legacy_swagger.yaml b/api/v2.0/legacy_swagger.yaml
index fc33c8c53..f7d0e0442 100644
--- a/api/v2.0/legacy_swagger.yaml
+++ b/api/v2.0/legacy_swagger.yaml
@@ -5699,8 +5699,10 @@ definitions:
       schedule:
         $ref: '#/definitions/AdminJobScheduleObj'
       parameters:
-        type: string
+        type: object
         description: The parameters of admin job
+        additionalProperties:
+          type: boolean
   AdminJobScheduleObj:
     type: object
     properties:
diff --git a/tests/apitests/python/library/system.py b/tests/apitests/python/library/system.py
index c67ad5434..e86f896d6 100644
--- a/tests/apitests/python/library/system.py
+++ b/tests/apitests/python/library/system.py
@@ -92,14 +92,20 @@ class System(base.Base):
 
     def create_gc_schedule(self, schedule_type, cron = None, expect_status_code = 201, expect_response_body = None, **kwargs):
         client = self._get_client(**kwargs)
-        gcscheduleschedule = swagger_client.AdminJobScheduleObj()
-        gcscheduleschedule.type = schedule_type
-        if cron is not None:
-            gcscheduleschedule.cron = cron
 
-        gc_schedule = swagger_client.AdminJobSchedule(gcscheduleschedule)
+        gc_parameters = {'delete_untagged':True}
+
+        gc_schedule = swagger_client.AdminJobScheduleObj()
+        gc_schedule.type = schedule_type
+        if cron is not None:
+            gc_schedule.cron = cron
+
+        gc_job = swagger_client.AdminJobSchedule()
+        gc_job.schedule = gc_schedule
+        gc_job.parameters = gc_parameters
+
         try:
-            _, status_code, header = client.system_gc_schedule_post_with_http_info(gc_schedule)
+            _, status_code, header = client.system_gc_schedule_post_with_http_info(gc_job)
         except ApiException as e:
             if e.status == expect_status_code:
                 if expect_response_body is not None and e.body.strip() != expect_response_body.strip():
diff --git a/tests/robot-cases/Group0-BAT/API_DB.robot b/tests/robot-cases/Group0-BAT/API_DB.robot
index 587814798..e4166e908 100644
--- a/tests/robot-cases/Group0-BAT/API_DB.robot
+++ b/tests/robot-cases/Group0-BAT/API_DB.robot
@@ -20,8 +20,8 @@ ${SERVER_API_ENDPOINT}  ${SERVER_URL}/api
 
 *** Test Cases ***
 # TODO uncomment this after re-implement the case
-# Test Case - Garbage Collection
-#    Harbor API Test  ./tests/apitests/python/test_garbage_collection.py
+Test Case - Garbage Collection
+    Harbor API Test  ./tests/apitests/python/test_garbage_collection.py
 Test Case - Add Private Project Member and Check User Can See It
     Harbor API Test  ./tests/apitests/python/test_add_member_to_private_project.py
 Test Case - Delete a Repository of a Certain Project Created by Normal User