diff --git a/tests/genesys/__init__.py b/tests/genesys/__init__.py
new file mode 100644
index 000000000..05982ea05
--- /dev/null
+++ b/tests/genesys/__init__.py
@@ -0,0 +1,6 @@
+# Copyright (c) 2026, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+"""Tests for Genesys AudioHook serializer."""
diff --git a/tests/genesys/conftest.py b/tests/genesys/conftest.py
new file mode 100644
index 000000000..656e815a5
--- /dev/null
+++ b/tests/genesys/conftest.py
@@ -0,0 +1,186 @@
+"""Pytest fixtures for Genesys AudioHook serializer tests.
+
+These fixtures provide sample AudioHook protocol messages for testing
+the GenesysAudioHookSerializer. They are scoped to this directory only.
+"""
+
+import pytest
+
+
+@pytest.fixture
+def sample_open_message():
+    """Sample AudioHook open message from Genesys."""
+    return {
+        "version": "2",
+        "type": "open",
+        "seq": 1,
+        "id": "test-session-123",
+        "parameters": {
+            "conversationId": "conv-456",
+            "participant": {
+                "ani": "+1234567890",
+                "dnis": "+0987654321",
+            },
+            "media": [
+                {
+                    "type": "audio",
+                    "format": "PCMU",
+                    "channels": ["external"],
+                    "rate": 8000,
+                }
+            ],
+        },
+    }
+
+
+@pytest.fixture
+def sample_open_message_with_input_variables():
+    """Sample AudioHook open message with custom inputVariables from Genesys."""
+    return {
+        "version": "2",
+        "type": "open",
+        "seq": 1,
+        "id": "test-session-123",
+        "parameters": {
+            "conversationId": "conv-456",
+            "participant": {
+                "ani": "+1234567890",
+                "dnis": "+0987654321",
+            },
+            "media": [
+                {
+                    "type": "audio",
+                    "format": "PCMU",
+                    "channels": ["external"],
+                    "rate": 8000,
+                }
+            ],
+            "inputVariables": {
+                "customer_id": "cust-789",
+                "queue_name": "billing",
+                "priority": "high",
+                "language": "es-ES",
+            },
+        },
+    }
+
+
+@pytest.fixture
+def sample_ping_message():
+    """Sample AudioHook ping message."""
+    return {
+        "version": "2",
+        "type": "ping",
+        "seq": 5,
+        "id": "test-session-123",
+        "position": "PT10.5S",
+    }
+
+
+@pytest.fixture
+def sample_close_message():
+    """Sample AudioHook close message from Genesys."""
+    return {
+        "version": "2",
+        "type": "close",
+        "seq": 10,
+        "id": "test-session-123",
+        "position": "PT30.0S",
+        "parameters": {
+            "reason": "disconnect",
+        },
+    }
+
+
+@pytest.fixture
+def sample_pause_message():
+    """Sample AudioHook pause message."""
+    return {
+        "version": "2",
+        "type": "pause",
+        "seq": 7,
+        "id": "test-session-123",
+        "position": "PT15.0S",
+        "parameters": {
+            "reason": "hold",
+        },
+    }
+
+
+@pytest.fixture
+def sample_update_message():
+    """Sample AudioHook update message."""
+    return {
+        "version": "2",
+        "type": "update",
+        "seq": 8,
+        "id": "test-session-123",
+        "position": "PT20.0S",
+        "parameters": {
+            "participant": {
+                "ani": "+1234567890",
+                "dnis": "+0987654321",
+                "name": "John Doe",
+            },
+        },
+    }
+
+
+@pytest.fixture
+def sample_error_message():
+    """Sample AudioHook error message."""
+    return {
+        "version": "2",
+        "type": "error",
+        "seq": 9,
+        "id": "test-session-123",
+        "parameters": {
+            "code": 500,
+            "message": "Internal server error",
+        },
+    }
+
+
+@pytest.fixture
+def sample_dtmf_message():
+    """Sample AudioHook DTMF message."""
+    return {
+        "version": "2",
+        "type": "dtmf",
+        "seq": 6,
+        "id": "test-session-123",
+        "position": "PT12.0S",
+        "parameters": {
+            "digit": "5",
+        },
+    }
+
+
+@pytest.fixture
+def sample_dtmf_star_message():
+    """Sample AudioHook DTMF message with star key."""
+    return {
+        "version": "2",
+        "type": "dtmf",
+        "seq": 6,
+        "id": "test-session-123",
+        "position": "PT12.0S",
+        "parameters": {
+            "digit": "*",
+        },
+    }
+
+
+@pytest.fixture
+def sample_dtmf_hash_message():
+    """Sample AudioHook DTMF message with hash key."""
+    return {
+        "version": "2",
+        "type": "dtmf",
+        "seq": 6,
+        "id": "test-session-123",
+        "position": "PT12.0S",
+        "parameters": {
+            "digit": "#",
+        },
+    }
diff --git a/tests/test_genesys_serializer.py b/tests/genesys/test_genesys_serializer.py
similarity index 100%
rename from tests/test_genesys_serializer.py
rename to tests/genesys/test_genesys_serializer.py