diff --git a/tests/test_config.py b/tests/test_config.py
index f1b4b4a6ce..5858bfa47a 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -1,9 +1,11 @@
+from contextlib import contextmanager
 from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Any
 
 import pytest
 from packaging.version import Version
+from pydantic import ValidationError
 
 from invokeai.app.invocations.baseinvocation import BaseInvocation
 from invokeai.app.services.config.config_default import (
@@ -12,6 +14,7 @@ from invokeai.app.services.config.config_default import (
     get_config,
     load_and_migrate_config,
 )
+from invokeai.app.services.shared.graph import Graph
 from invokeai.frontend.cli.arg_parser import InvokeAIArgs
 
 invalid_v4_0_1_config = """
@@ -285,21 +288,34 @@ def test_get_config_writing(patch_rootdir: None, monkeypatch: pytest.MonkeyPatch
     InvokeAIArgs.did_parse = False
 
 
+@contextmanager
+def clear_config():
+    try:
+        yield None
+    finally:
+        get_config.cache_clear()
+
+
 def test_deny_nodes():
-    config = get_config()
-    config.allow_nodes = ["integer", "string", "float"]
-    config.deny_nodes = ["float"]
+    with clear_config():
+        config = get_config()
+        config.allow_nodes = ["integer", "string", "float"]
+        config.deny_nodes = ["float"]
 
-    # confirm invocations union will not have denied nodes
-    all_invocations = BaseInvocation.get_invocations()
+        # confirm graph validation fails when using denied node
+        Graph(nodes={"1": {"id": "1", "type": "integer"}})
+        Graph(nodes={"1": {"id": "1", "type": "string"}})
 
-    has_integer = len([i for i in all_invocations if i.model_fields.get("type").default == "integer"]) == 1
-    has_string = len([i for i in all_invocations if i.model_fields.get("type").default == "string"]) == 1
-    has_float = len([i for i in all_invocations if i.model_fields.get("type").default == "float"]) == 1
+        with pytest.raises(ValidationError):
+            Graph(nodes={"1": {"id": "1", "type": "float"}})
 
-    assert has_integer
-    assert has_string
-    assert not has_float
+        # confirm invocations union will not have denied nodes
+        all_invocations = BaseInvocation.get_invocations()
 
-    # may not be necessary
-    get_config.cache_clear()
+        has_integer = len([i for i in all_invocations if i.model_fields.get("type").default == "integer"]) == 1
+        has_string = len([i for i in all_invocations if i.model_fields.get("type").default == "string"]) == 1
+        has_float = len([i for i in all_invocations if i.model_fields.get("type").default == "float"]) == 1
+
+        assert has_integer
+        assert has_string
+        assert not has_float