diff --git a/tests/test_manager_scan.py b/tests/test_manager_scan.py
new file mode 100644
index 0000000..63f4289
--- /dev/null
+++ b/tests/test_manager_scan.py
@@ -0,0 +1,37 @@
+"""ComfyUI-Manager reads every .py file of a plugin, tests too, and lists whatever looks like a node
+table as that plugin's nodes. AMB has none (AD-024), so no file may look like one: a table in a test once
+made Manager offer AMB to people who missed Power Lora Loader, in place of rgthree."""
+import re
+import unittest
+from pathlib import Path
+
+PLUGIN = Path(__file__).resolve().parents[1]
+
+# As ComfyUI-Manager's scanner.py (scan_in_file) has them.
+TABLE = re.compile(r"_CLASS_MAPPINGS\s*(?::\s*\w+\s*)?=\s*(?:\\\s*)?{([^}]*)}", re.MULTILINE | re.DOTALL)
+OTHERS = (r'^[^=]*_CLASS_MAPPINGS\["(.*?)"\]', r"^[^=]*_CLASS_MAPPINGS\['(.*?)'\]",
+          r'@register_node\("(.+)",\s*\".+"\)', r'"(\w+)"\s*:\s*{"class":\s*\w+\s*')
+
+
+def claims(code):
+    """What the scanner would take for nodes in `code`: the tables with something in them, and the other forms."""
+    found = [table.strip() for table in TABLE.findall(code) if table.strip()]
+    return found + [name for pattern in OTHERS for name in re.findall(pattern, code)]
+
+
+class ManagerScanTests(unittest.TestCase):
+    def test_the_check_sees_a_table(self):
+        name = "NODE_CLASS_" + "MAPPINGS"  # in two, or this file would be the one to look like a table
+        self.assertTrue(claims(name + ' = {"Some Node": object}'))
+        self.assertFalse(claims(name + " = {}"))
+
+    def test_no_file_looks_like_a_node_table(self):
+        for path in PLUGIN.rglob("*.py"):
+            parts = path.relative_to(PLUGIN).parts
+            if "__pycache__" in parts or any(part.startswith(".") for part in parts):
+                continue  # the scanner leaves these out too
+            self.assertEqual(claims(path.read_text(encoding="utf-8", errors="ignore")), [], path)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_model_usage.py b/tests/test_model_usage.py
index e2c3550..a9c0325 100644
--- a/tests/test_model_usage.py
+++ b/tests/test_model_usage.py
@@ -65,18 +65,19 @@ class UsageTests(unittest.TestCase):
             {"type": "loras", "root": 0, "rel": "never.safetensors", "size": 9},
             {"type": "vae", "root": 0, "rel": "hashed.safetensors", "size": 1},
         ]
+        registered = {  # by this name, not as the keyword's value: tests/test_manager_scan.py says why
+            "KSampler": node("nodes", ["MODEL"], ["LATENT"]),
+            "Power Lora Loader (rgthree)": node("custom_nodes.rgthree-comfy", ["MODEL"], ["MODEL"]),
+            "easy loraStack": node("custom_nodes.ComfyUI-Easy-Use"),
+            "easy seed": node("custom_nodes.ComfyUI-Easy-Use.py.nodes"),
+            "Unused Thing": node("custom_nodes.forgotten-pack"),
+            "DetailerForEach": node("custom_nodes.ComfyUI-Impact-Pack", ["IMAGE", "BBOX_DETECTOR"], ["IMAGE"]),
+            "UltralyticsDetectorProvider": node("custom_nodes.comfyui-impact-subpack", [], ["BBOX_DETECTOR"]),
+            "Genie Speak": node("custom_nodes.Genie-TTS", ["STRING"], ["AUDIO"]),
+            "Manager Thing": node("custom_nodes.ComfyUI-Manager"),
+        }
         nodes = types.SimpleNamespace(
-            NODE_CLASS_MAPPINGS={
-                "KSampler": node("nodes", ["MODEL"], ["LATENT"]),
-                "Power Lora Loader (rgthree)": node("custom_nodes.rgthree-comfy", ["MODEL"], ["MODEL"]),
-                "easy loraStack": node("custom_nodes.ComfyUI-Easy-Use"),
-                "easy seed": node("custom_nodes.ComfyUI-Easy-Use.py.nodes"),
-                "Unused Thing": node("custom_nodes.forgotten-pack"),
-                "DetailerForEach": node("custom_nodes.ComfyUI-Impact-Pack", ["IMAGE", "BBOX_DETECTOR"], ["IMAGE"]),
-                "UltralyticsDetectorProvider": node("custom_nodes.comfyui-impact-subpack", [], ["BBOX_DETECTOR"]),
-                "Genie Speak": node("custom_nodes.Genie-TTS", ["STRING"], ["AUDIO"]),
-                "Manager Thing": node("custom_nodes.ComfyUI-Manager"),
-            },
+            NODE_CLASS_MAPPINGS=registered,
             LOADED_MODULE_DIRS={name: str(custom / name) for name in packs},
             EXTENSION_WEB_DIRS={"rgthree-comfy": str(custom / "rgthree-comfy" / "js"), "page-only": str(custom / "page-only" / "web")},
         )
diff --git a/tests/test_tts_version.py b/tests/test_tts_version.py
index 1e8c597..0758b9e 100644
--- a/tests/test_tts_version.py
+++ b/tests/test_tts_version.py
@@ -11,7 +11,8 @@ PLUGIN = Path(__file__).resolve().parents[1]
 sys.path[:0] = [str(PLUGIN), str(PLUGIN.parents[1])]
 from api import tts_version, version_manager as vm
 
-NODES = 'NODE_CLASS_MAPPINGS = {"AnomalousTTS_CharacterSpeech": object}\n'
+MAPPINGS = 'NODE_CLASS_' + 'MAPPINGS'  # in two: tests/test_manager_scan.py says why
+NODES = MAPPINGS + ' = {"AnomalousTTS_CharacterSpeech": object}\n'
 
 
 def git(cwd, *args):
@@ -51,7 +52,7 @@ class TtsVersionTests(unittest.TestCase):
     def test_only_the_official_clone_is_found(self):
         self.assertIsNone(tts_version.find_checkout())
         self.clone('A_fork', 'https://github.com/someone/Anomalous_TTS.git')
-        self.clone('Other_pack', 'https://github.com/DemonGatanjieu/Anomalous_TTS', nodes='NODE_CLASS_MAPPINGS = {}\n')
+        self.clone('Other_pack', 'https://github.com/DemonGatanjieu/Anomalous_TTS', nodes=MAPPINGS + ' = {}\n')
         (self.nodes / 'Plain_copy').mkdir()
         Path(self.nodes / 'Plain_copy' / 'nodes.py').write_text(NODES, encoding='utf-8')  # no git: Manager's zip, a copy
         self.assertIsNone(tts_version.find_checkout())