Fix test with PROCESSING_ALL_SAFES_TOGETHER to False (#2605)

Author: falvaradorodriguez

safe_transaction_service/history/tests/test_tasks.py

@@ -224,12 +224,13 @@ def _test_process_decoded_internal_txs_task(self):
         self.assertEqual(safe_status.threshold, threshold)
 
     def test_process_decoded_internal_txs_task_together(self):
-        with self.assertLogs(logger=task_logger) as cm:
-            self._test_process_decoded_internal_txs_task()
-            self.assertIn(
-                "Start process decoded internal txs for every Safe together",
-                cm.output[0],
-            )
+        with self.settings(PROCESSING_ALL_SAFES_TOGETHER=True):
+            with self.assertLogs(logger=task_logger) as cm:
+                self._test_process_decoded_internal_txs_task()
+                self.assertIn(
+                    "Start process decoded internal txs for every Safe together",
+                    cm.output[0],
+                )
 
     def test_process_decoded_internal_txs_task_different_tasks(self):
         with self.settings(PROCESSING_ALL_SAFES_TOGETHER=False):