|  | @@ -85,7 +85,7 @@ async def _start_test_server():
 | 
	
		
			
				|  |  |      port = server.add_insecure_port('[::]:0')
 | 
	
		
			
				|  |  |      server.add_generic_rpc_handlers((_GenericHandler(),))
 | 
	
		
			
				|  |  |      await server.start()
 | 
	
		
			
				|  |  | -    return 'localhost:%d' % port, server
 | 
	
		
			
				|  |  | +    return f'localhost:{port}', server
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  class TestTimeout(AioTestBase):
 |