diff --git a/dumas_h3_longvideos.py b/dumas_h3_longvideos.py
index 3e636c0..4b058d5 100644
--- a/dumas_h3_longvideos.py
+++ b/dumas_h3_longvideos.py
@@ -6615,11 +6615,12 @@ class H3LongVideos:
                 detail += f"/{latent_upscale_param.get('method', 'bilinear')}"
             denoise_value = latent_upscale_param.get("denoise", latent_upscale_param.get("refine_denoise", 0.2))
             denoise = 0.2 if denoise_value is None else float(denoise_value)
+            refine_sampler = latent_upscale_param.get("sampler_name", "euler_ancestral")
+            refine_scheduler = latent_upscale_param.get("scheduler", "simple")
             latent_upscale_note = (
                 f" latent upscale: target {target_w}x{target_h}px{detail}; "
                 f"{int(latent_upscale_param.get('steps', 2) or 2)}-step refinement "
-                f"{latent_upscale_param.get('sampler_name', sn)}/{latent_upscale_param.get('scheduler', sch)} "
-                f"denoise {denoise:.2f}"
+                f"{refine_sampler}/{refine_scheduler} denoise {denoise:.2f}"
             )
 
         paras = split_paragraphs(prompt, "##")
diff --git a/tests/test_dumas_h3_longvideos.py b/tests/test_dumas_h3_longvideos.py
index d3f33d5..8f598f9 100644
--- a/tests/test_dumas_h3_longvideos.py
+++ b/tests/test_dumas_h3_longvideos.py
@@ -966,12 +966,23 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
                 plan_only=True,
                 ref_1={"image": "live-1"},
                 ref_3={"image": "live-3"},
+                latent_upscale_param={
+                    "mode": "interp",
+                    "method": "bilinear",
+                    "sampler_name": "euler_ancestral",
+                    "scheduler": "simple",
+                    "steps": 2,
+                    "denoise": 0.2,
+                    "megapixels": 1.5,
+                },
             )
 
             self.assertEqual(calls["refs"][0]["image"], "live-1")
             self.assertIsNone(calls["refs"][1])
             self.assertEqual(calls["refs"][2]["image"], "live-3")
             self.assertEqual(result[2].count("ref2va: 2 reference image(s)"), 1)
+            self.assertIn("latent upscale:", result[2])
+            self.assertIn("euler_ancestral/simple", result[2])
         finally:
             self.module.parse_resolution = original_parse_resolution
             self.module._connected_refs = original_connected_refs