diff --git a/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml b/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml
new file mode 100644
index 0000000000..775a383a77
--- /dev/null
+++ b/releasenotes/notes/fix-list-group-snapshots-api-969d9321002c566c.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fix list_group_snapshots API in v3 group_snapshots_client： Bug#1715786.
+    The url path for list group snapshots with details API is changed from
+    ``?detail=True`` to ``/detail``.
diff --git a/tempest/api/volume/admin/test_groups.py b/tempest/api/volume/admin/test_groups.py
index baea37ba3e..489b1c8ccc 100644
--- a/tempest/api/volume/admin/test_groups.py
+++ b/tempest/api/volume/admin/test_groups.py
@@ -167,18 +167,20 @@ class GroupsTest(base.BaseVolumeAdminTest):
             group_snapshot['id'])['group_snapshot']
         self.assertEqual(group_snapshot_name, group_snapshot['name'])
 
-        # Get all group snapshots with detail
-        group_snapshots = (
-            self.group_snapshots_client.list_group_snapshots(
-                detail=True)['group_snapshots'])
+        # Get all group snapshots with details, check some detail-specific
+        # elements, and look for the created group snapshot
+        group_snapshots = (self.group_snapshots_client.list_group_snapshots(
+            detail=True)['group_snapshots'])
+        for grp_snapshot in group_snapshots:
+            self.assertIn('created_at', grp_snapshot)
+            self.assertIn('group_id', grp_snapshot)
         self.assertIn((group_snapshot['name'], group_snapshot['id']),
                       [(m['name'], m['id']) for m in group_snapshots])
 
         # Delete group snapshot
         self._delete_group_snapshot(group_snapshot['id'], grp['id'])
-        group_snapshots = (
-            self.group_snapshots_client.list_group_snapshots(
-                detail=True)['group_snapshots'])
+        group_snapshots = (self.group_snapshots_client.list_group_snapshots()
+                           ['group_snapshots'])
         self.assertEmpty(group_snapshots)
 
     @decorators.idempotent_id('eff52c70-efc7-45ed-b47a-4ad675d09b81')
diff --git a/tempest/lib/services/volume/v3/group_snapshots_client.py b/tempest/lib/services/volume/v3/group_snapshots_client.py
index e644f02180..d74e68a22c 100644
--- a/tempest/lib/services/volume/v3/group_snapshots_client.py
+++ b/tempest/lib/services/volume/v3/group_snapshots_client.py
@@ -60,7 +60,7 @@ class GroupSnapshotsClient(base_client.BaseClient):
         self.expected_success(200, resp.status)
         return rest_client.ResponseBody(resp, body)
 
-    def list_group_snapshots(self, **params):
+    def list_group_snapshots(self, detail=False, **params):
         """Information for all the tenant's group snapshots.
 
         For more information, please refer to the official API reference:
@@ -68,6 +68,8 @@ class GroupSnapshotsClient(base_client.BaseClient):
         https://developer.openstack.org/api-ref/block-storage/v3/#list-group-snapshots-with-details
         """
         url = "group_snapshots"
+        if detail:
+            url += "/detail"
         if params:
             url += '?%s' % urllib.urlencode(params)
         resp, body = self.get(url)
diff --git a/tempest/tests/lib/services/volume/v3/test_group_snapshots_client.py b/tempest/tests/lib/services/volume/v3/test_group_snapshots_client.py
index 5ac5c08864..840617cd06 100644
--- a/tempest/tests/lib/services/volume/v3/test_group_snapshots_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_group_snapshots_client.py
@@ -93,7 +93,8 @@ class TestGroupSnapshotsClient(base.BaseServiceTest):
             bytes_body,
             group_snapshot_id="3fbbcccf-d058-4502-8844-6feeffdf4cb5")
 
-    def _test_list_group_snapshots(self, bytes_body=False, detail=False):
+    def _test_list_group_snapshots(self, detail=False, bytes_body=False,
+                                   mock_args='group_snapshots', **params):
         resp_body = []
         if detail:
             resp_body = self.FAKE_LIST_GROUP_SNAPSHOTS
@@ -111,8 +112,10 @@ class TestGroupSnapshotsClient(base.BaseServiceTest):
             self.client.list_group_snapshots,
             'tempest.lib.common.rest_client.RestClient.get',
             resp_body,
-            bytes_body,
-            detail=detail)
+            to_utf=bytes_body,
+            mock_args=[mock_args],
+            detail=detail,
+            **params)
 
     def test_create_group_snapshot_with_str_body(self):
         self._test_create_group_snapshot()
@@ -132,6 +135,25 @@ class TestGroupSnapshotsClient(base.BaseServiceTest):
     def test_list_group_snapshots_with_bytes_body(self):
         self._test_list_group_snapshots(bytes_body=True)
 
+    def test_list_group_snapshots_with_detail_with_str_body(self):
+        mock_args = "group_snapshots/detail"
+        self._test_list_group_snapshots(detail=True, mock_args=mock_args)
+
+    def test_list_group_snapshots_with_detail_with_bytes_body(self):
+        mock_args = "group_snapshots/detail"
+        self._test_list_group_snapshots(detail=True, bytes_body=True,
+                                        mock_args=mock_args)
+
+    def test_list_group_snapshots_with_params(self):
+        # Run the test separately for each param, to avoid assertion error
+        # resulting from randomized params order.
+        mock_args = 'group_snapshots?sort_key=name'
+        self._test_list_group_snapshots(mock_args=mock_args, sort_key='name')
+
+        mock_args = 'group_snapshots/detail?limit=10'
+        self._test_list_group_snapshots(detail=True, bytes_body=True,
+                                        mock_args=mock_args, limit=10)
+
     def test_delete_group_snapshot(self):
         self.check_service_client_function(
             self.client.delete_group_snapshot,