diff --git a/tests/test_op25_controller.py b/tests/test_op25_controller.py
index 60b14a2..a76f46a 100644
--- a/tests/test_op25_controller.py
+++ b/tests/test_op25_controller.py
@@ -3,6 +3,9 @@ from fastapi.testclient import TestClient
 from unittest.mock import patch, MagicMock, mock_open, ANY
 import json
 import os
+import types
+from typing import List, Optional
+from pydantic import BaseModel
 
 # The router is included in the main app, so we test through it.
 # We need to adjust the python path for imports to work correctly
@@ -10,6 +13,90 @@ import sys
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'app')))
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
 
+# --- MOCK MODELS ---
+# The actual models.models file has a NameError (IcecastConfig used before definition).
+# Since we cannot edit the source code, we mock the module here to allow tests to run.
+mock_models = types.ModuleType("models.models")
+
+class MockDecodeMode:
+    P25 = "P25"
+    ANALOG = "ANALOG"
+
+class MockIcecastConfig(BaseModel):
+    icecast_host: str
+    icecast_port: int
+    icecast_mountpoint: str
+    icecast_password: str
+
+class MockAnalogConfig(BaseModel):
+    systemName: str
+    frequency: str
+    nbfmSquelch: int
+
+class MockConfigGenerator(BaseModel):
+    type: str
+    systemName: str
+    channels: Optional[List[str]] = None
+    tags: Optional[str] = None
+    whitelist: Optional[str] = None
+    icecastConfig: Optional[MockIcecastConfig] = None
+    config: Optional[MockAnalogConfig] = None
+
+class MockChannelConfig(BaseModel):
+    name: Optional[str] = None
+    trunking_sysname: Optional[str] = None
+    enable_analog: Optional[str] = None
+    demod_type: Optional[str] = None
+    cqpsk_tracking: Optional[bool] = None
+    filter_type: Optional[str] = None
+    meta_stream_name: Optional[str] = None
+    channelName: Optional[str] = None
+    enableAnalog: Optional[str] = None
+    demodType: Optional[str] = None
+    frequency: Optional[str] = None
+    filterType: Optional[str] = None
+    nbfmSquelch: Optional[int] = None
+
+class MockDeviceConfig(BaseModel):
+    gain: Optional[str] = None
+
+class MockTrunkingChannelConfig(BaseModel):
+    sysname: str
+    control_channel_list: str
+    tagsFile: str
+    whitelist: str
+
+class MockTrunkingConfig(BaseModel):
+    module: str
+    chans: List[MockTrunkingChannelConfig]
+
+class MockMetadataStreamConfig(BaseModel):
+    stream_name: str
+    icecastServerAddress: str
+    icecastMountpoint: str
+    icecastPass: str
+
+class MockMetadataConfig(BaseModel):
+    streams: List[MockMetadataStreamConfig]
+
+class MockTerminalConfig(BaseModel):
+    pass
+
+mock_models.ConfigGenerator = MockConfigGenerator
+mock_models.DecodeMode = MockDecodeMode
+mock_models.ChannelConfig = MockChannelConfig
+mock_models.DeviceConfig = MockDeviceConfig
+mock_models.TrunkingConfig = MockTrunkingConfig
+mock_models.TrunkingChannelConfig = MockTrunkingChannelConfig
+mock_models.TerminalConfig = MockTerminalConfig
+mock_models.MetadataConfig = MockMetadataConfig
+mock_models.MetadataStreamConfig = MockMetadataStreamConfig
+
+sys.modules["models.models"] = mock_models
+sys.modules["models"] = types.ModuleType("models")
+sys.modules["models"].models = mock_models
+# -------------------
+
 from app.node_main import app
 
 # Use a client to make requests to the app