diff --git a/arq/worker.py b/arq/worker.py
index 398409b5..73a6158c 100644
--- a/arq/worker.py
+++ b/arq/worker.py
@@ -483,6 +483,7 @@ async def run_job(self, job_id: str, score: int) -> None:  # noqa: C901
                 abort_job = False
 
         function_name, enqueue_time_ms = '<unknown>', 0
+        function: Optional[Union[Function, CronJob]] = None
         args: Tuple[Any, ...] = ()
         kwargs: Dict[Any, Any] = {}
 
@@ -502,7 +503,7 @@ async def job_failed(exc: BaseException) -> None:
                 serializer=self.job_serializer,
                 queue_name=self.queue_name,
             )
-            await asyncio.shield(self.finish_failed_job(job_id, result_data_))
+            await asyncio.shield(self.finish_failed_job(job_id, result_data_, function))
 
         if not v:
             logger.warning('job %s expired', job_id)
@@ -516,14 +517,15 @@ async def job_failed(exc: BaseException) -> None:
             logger.exception('deserializing job %s failed', job_id)
             return await job_failed(e)
 
+        with contextlib.suppress(KeyError):
+            function = self.functions[function_name]
+
         if abort_job:
             t = (timestamp_ms() - enqueue_time_ms) / 1000
             logger.info('%6.2fs ⊘ %s:%s aborted before start', t, job_id, function_name)
             return await job_failed(asyncio.CancelledError())
 
-        try:
-            function: Union[Function, CronJob] = self.functions[function_name]
-        except KeyError:
+        if function is None:
             logger.warning('job %s, function %r not found', job_id, function_name)
             return await job_failed(JobExecutionFailed(f'function {function_name!r} not found'))
 
@@ -558,7 +560,7 @@ async def job_failed(exc: BaseException) -> None:
                 self.queue_name,
                 serializer=self.job_serializer,
             )
-            return await asyncio.shield(self.finish_failed_job(job_id, result_data))
+            return await asyncio.shield(self.finish_failed_job(job_id, result_data, function))
 
         result = no_result
         exc_extra = None
@@ -701,7 +703,9 @@ async def finish_job(
                 tr.delete(*delete_keys)  # type: ignore[unused-coroutine]
             await tr.execute()
 
-    async def finish_failed_job(self, job_id: str, result_data: Optional[bytes]) -> None:
+    async def finish_failed_job(
+        self, job_id: str, result_data: Optional[bytes], function: Optional[Union[Function, CronJob]]
+    ) -> None:
         async with self.pool.pipeline(transaction=True) as tr:
             tr.delete(  # type: ignore[unused-coroutine]
                 retry_key_prefix + job_id,
@@ -710,8 +714,16 @@ async def finish_failed_job(self, job_id: str, result_data: Optional[bytes]) ->
             )
             tr.zrem(abort_jobs_ss, job_id)  # type: ignore[unused-coroutine]
             tr.zrem(self.queue_name, job_id)  # type: ignore[unused-coroutine]
+
+            keep_result_forever = self.keep_result_forever
+            keep_result_s = self.keep_result_s
+            if function is not None:
+                if function.keep_result_forever is not None:
+                    keep_result_forever = function.keep_result_forever
+                if function.keep_result_s is not None:
+                    keep_result_s = function.keep_result_s
+            keep_result = keep_result_forever or keep_result_s > 0
             # result_data would only be None if serializing the result fails
-            keep_result = self.keep_result_forever or self.keep_result_s > 0
             if result_data is not None and keep_result:  # pragma: no branch
                 expire = 0 if self.keep_result_forever else self.keep_result_s
                 tr.set(result_key_prefix + job_id, result_data, px=to_ms(expire))  # type: ignore[unused-coroutine]