diff --git a/tests/gateway/test_background_command.py b/tests/gateway/test_background_command.py
index 6a780fb13..027742ea0 100644
--- a/tests/gateway/test_background_command.py
+++ b/tests/gateway/test_background_command.py
@@ -32,6 +32,7 @@ def _make_runner():
     from gateway.run import GatewayRunner
     runner = object.__new__(GatewayRunner)
     runner.adapters = {}
+    runner._voice_mode = {}
     runner._session_db = None
     runner._reasoning_config = None
     runner._provider_routing = {}
diff --git a/tests/gateway/test_resume_command.py b/tests/gateway/test_resume_command.py
index 17adcd2e7..987afbce3 100644
--- a/tests/gateway/test_resume_command.py
+++ b/tests/gateway/test_resume_command.py
@@ -36,6 +36,7 @@ def _make_runner(session_db=None, current_session_id="current_session_001",
     from gateway.run import GatewayRunner
     runner = object.__new__(GatewayRunner)
     runner.adapters = {}
+    runner._voice_mode = {}
     runner._session_db = session_db
     runner._running_agents = {}
 
diff --git a/tests/gateway/test_run_progress_topics.py b/tests/gateway/test_run_progress_topics.py
index 20ae712a2..66d13e0d0 100644
--- a/tests/gateway/test_run_progress_topics.py
+++ b/tests/gateway/test_run_progress_topics.py
@@ -77,6 +77,7 @@ def _make_runner(adapter):
 
     runner = object.__new__(GatewayRunner)
     runner.adapters = {Platform.TELEGRAM: adapter}
+    runner._voice_mode = {}
     runner._prefill_messages = []
     runner._ephemeral_system_prompt = ""
     runner._reasoning_config = None
diff --git a/tests/gateway/test_session_hygiene.py b/tests/gateway/test_session_hygiene.py
index d627c2056..7e75b906d 100644
--- a/tests/gateway/test_session_hygiene.py
+++ b/tests/gateway/test_session_hygiene.py
@@ -266,6 +266,7 @@ async def test_session_hygiene_messages_stay_in_originating_topic(monkeypatch, t
         platforms={Platform.TELEGRAM: PlatformConfig(enabled=True, token="fake-token")}
     )
     runner.adapters = {Platform.TELEGRAM: adapter}
+    runner._voice_mode = {}
     runner.hooks = SimpleNamespace(emit=AsyncMock(), loaded_hooks=False)
     runner.session_store = MagicMock()
     runner.session_store.get_or_create_session.return_value = SessionEntry(
diff --git a/tests/gateway/test_title_command.py b/tests/gateway/test_title_command.py
index 7f7c782a7..d5bad6c57 100644
--- a/tests/gateway/test_title_command.py
+++ b/tests/gateway/test_title_command.py
@@ -31,6 +31,7 @@ def _make_runner(session_db=None):
     from gateway.run import GatewayRunner
     runner = object.__new__(GatewayRunner)
     runner.adapters = {}
+    runner._voice_mode = {}
     runner._session_db = session_db
 
     # Mock session_store that returns a session entry with a known session_id
diff --git a/tests/gateway/test_update_command.py b/tests/gateway/test_update_command.py
index 063f3c5ac..0aad419a5 100644
--- a/tests/gateway/test_update_command.py
+++ b/tests/gateway/test_update_command.py
@@ -33,6 +33,7 @@ def _make_runner():
     from gateway.run import GatewayRunner
     runner = object.__new__(GatewayRunner)
     runner.adapters = {}
+    runner._voice_mode = {}
     return runner