diff --git a/superset/models/core.py b/superset/models/core.py
index 78bbf55cdf2b9..512c5a93e300e 100755
--- a/superset/models/core.py
+++ b/superset/models/core.py
@@ -982,7 +982,7 @@ def get_foreign_keys(self, table: Table) -> list[dict[str, Any]]:
 
     def get_schema_access_for_file_upload(  # pylint: disable=invalid-name
         self,
-    ) -> list[str]:
+    ) -> set[str]:
         allowed_databases = self.get_extra().get("schemas_allowed_for_file_upload", [])
 
         if isinstance(allowed_databases, str):
@@ -993,7 +993,7 @@ def get_schema_access_for_file_upload(  # pylint: disable=invalid-name
                 self, g.user
             )
             allowed_databases += extra_allowed_databases
-        return sorted(set(allowed_databases))
+        return set(allowed_databases)
 
     @property
     def sqlalchemy_uri_decrypted(self) -> str:
diff --git a/tests/integration_tests/dashboards/api_tests.py b/tests/integration_tests/dashboards/api_tests.py
index b4e2958ccd07c..259b9485fbe78 100644
--- a/tests/integration_tests/dashboards/api_tests.py
+++ b/tests/integration_tests/dashboards/api_tests.py
@@ -2621,7 +2621,7 @@ def test_update_dashboard_add_tags_can_write_on_tag(self):
 
         # Clean up system tags
         tag_list = [tag.id for tag in model.tags if tag.type == TagType.custom]
-        self.assertEqual(tag_list, new_tags)
+        self.assertEqual(sorted(tag_list), sorted(new_tags))
 
     @pytest.mark.usefixtures("create_dashboard_with_tag")
     def test_update_dashboard_remove_tags_can_write_on_tag(self):
diff --git a/tests/unit_tests/models/core_test.py b/tests/unit_tests/models/core_test.py
index e563971a5cb7e..6f588cde2408c 100644
--- a/tests/unit_tests/models/core_test.py
+++ b/tests/unit_tests/models/core_test.py
@@ -461,3 +461,23 @@ def test_raw_connection_oauth(mocker: MockerFixture) -> None:
         with database.get_raw_connection() as conn:
             conn.cursor()
     assert str(excinfo.value) == "You don't have permission to access the data."
+
+
+def test_get_schema_access_for_file_upload() -> None:
+    """
+    Test the `get_schema_access_for_file_upload` method.
+    """
+    database = Database(
+        database_name="first-database",
+        sqlalchemy_uri="gsheets://",
+        extra=json.dumps(
+            {
+                "metadata_params": {},
+                "engine_params": {},
+                "metadata_cache_timeout": {},
+                "schemas_allowed_for_file_upload": '["public"]',
+            }
+        ),
+    )
+
+    assert database.get_schema_access_for_file_upload() == {"public"}