diff --git a/fastvideo/registry.py b/fastvideo/registry.py
index 6fa1a28c9..9dfe3b5ca 100644
--- a/fastvideo/registry.py
+++ b/fastvideo/registry.py
@@ -881,8 +881,9 @@ def _register_configs() -> None:
             "nvidia/Cosmos-Predict2-2B-Video2World",
         ],
         model_detectors=[
-            lambda path: "cosmos" in path.lower() and ("2.5" not in path.lower() and "2_5" not in path.lower() and "25"
-                                                       not in path.lower() and "gen3c" not in path.lower()),
+            lambda path: "cosmos" in path.lower() and
+            ("2.5" not in path.lower() and "2_5" not in path.lower() and "25" not in path.lower() and "gen3c" not in
+             path.lower() and "cosmos3" not in path.lower() and "cosmos-3" not in path.lower()),
         ],
         model_family="cosmos",
         default_preset="cosmos_predict2_2b",
diff --git a/tests/local_tests/pipelines/test_cosmos3_pipeline_parity.py b/tests/local_tests/pipelines/test_cosmos3_pipeline_parity.py
index 254ddf8ba..20c968620 100644
--- a/tests/local_tests/pipelines/test_cosmos3_pipeline_parity.py
+++ b/tests/local_tests/pipelines/test_cosmos3_pipeline_parity.py
@@ -128,3 +128,20 @@ def test_cosmos3_registry_exposes_both_video_workloads() -> None:
     for workload in ("t2v", "i2v"):
         registered = get_registered_models_with_workloads(workload)
         assert any(model["id"] == "nvidia/Cosmos3-Nano" for model in registered)
+
+
+def test_cosmos3_local_snapshot_registry_is_unambiguous(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> None:
+    from fastvideo.registry import get_preset_selection
+
+    model_dir = tmp_path / "snapshot"
+    (model_dir / "transformer").mkdir(parents=True)
+    (model_dir / "model_index.json").write_text(
+        json.dumps({
+            "_class_name": "Cosmos3OmniDiffusersPipeline",
+            "_diffusers_version": "0.39.0",
+        }),
+        encoding="utf-8",
+    )
+
+    assert get_preset_selection(str(model_dir)) == ("cosmos3_nano", "cosmos3")
+    assert "Multiple models matched" not in caplog.text