diff --git a/tests/pipelines/stable_diffusion/test_stable_diffusion.py b/tests/pipelines/stable_diffusion/test_stable_diffusion.py
index df9e8d47f1b1..6ac7cc0c531b 100644
--- a/tests/pipelines/stable_diffusion/test_stable_diffusion.py
+++ b/tests/pipelines/stable_diffusion/test_stable_diffusion.py
@@ -90,6 +90,8 @@ def _test_stable_diffusion_compile(in_queue, out_queue, timeout):
     out_queue.put(results, timeout=timeout)
     out_queue.join()
 
+# the issue is to make fast test for StableDiffusionPipeline smaller! 
+# TODO : changes to the architecture of UNET/CLIP/VAE
 
 class StableDiffusionPipelineFastTests(
     PipelineLatentTesterMixin, PipelineKarrasSchedulerTesterMixin, PipelineTesterMixin, unittest.TestCase