code: def test_timesteps(self):
      for timesteps in [25, 50, 100, 999, 1000]:
          self.check_over_configs(num_train_timesteps=timesteps)
  
imports: import tempfile
  import torch
  from diffusers import DEISMultistepScheduler, DPMSolverMultistepScheduler, DPMSolverSinglestepScheduler, UniPCMultistepScheduler
  from .test_schedulers import SchedulerCommonTest
label_desc: Use image node_id 7 for calling the DPMSolverMultistepSchedulerTest obj's underlying member method code with example usage: obj.test_timesteps() without return types