diff --git a/tests/pipelines/ddpm/test_ddpm.py b/tests/pipelines/ddpm/test_ddpm.py
index 14bc094697..f4517907cd 100644
--- a/tests/pipelines/ddpm/test_ddpm.py
+++ b/tests/pipelines/ddpm/test_ddpm.py
@@ -88,7 +88,11 @@ class DDPMPipelineFastTests(PipelineTesterMixin, unittest.TestCase):
             generator = torch.Generator(device=torch_device).manual_seed(0)
         image = ddpm(generator=generator, num_inference_steps=2, output_type="numpy").images
 
-        generator = generator.manual_seed(0)
+        if torch_device == "mps":
+            # device type MPS is not supported for torch.Generator() api.
+            generator = torch.manual_seed(0)
+        else:
+            generator = torch.Generator(device=torch_device).manual_seed(0)
         image_eps = ddpm(generator=generator, num_inference_steps=2, output_type="numpy", predict_epsilon=False)[0]
 
         image_slice = image[0, -3:, -3:, -1]