diff --git a/pyproject.toml b/pyproject.toml
index a22053c..0546523 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,9 @@ dev = [
     "pytest>=9.0.0,<10.0.0",
     "pytest-asyncio>=1.3.0,<2.0.0",
     "ruff>=0.1.0",
+    "matrix-nio[e2e]>=0.25.2",
+    "mistune>=3.0.0,<4.0.0",
+    "nh3>=0.2.17,<1.0.0",
 ]
 
 [project.scripts]
diff --git a/tests/test_context_prompt_cache.py b/tests/test_context_prompt_cache.py
index 9afcc7d..38b8d35 100644
--- a/tests/test_context_prompt_cache.py
+++ b/tests/test_context_prompt_cache.py
@@ -54,13 +54,12 @@ def test_runtime_context_is_separate_untrusted_user_message(tmp_path) -> None:
     assert messages[0]["role"] == "system"
     assert "## Current Session" not in messages[0]["content"]
 
-    assert messages[-2]["role"] == "user"
-    runtime_content = messages[-2]["content"]
+    assert len(messages) == 2
+    assert messages[-1]["role"] == "user"
+    runtime_content = messages[-1]["content"]
     assert isinstance(runtime_content, str)
     assert ContextBuilder._RUNTIME_CONTEXT_TAG in runtime_content
     assert "Current Time:" in runtime_content
     assert "Channel: cli" in runtime_content
     assert "Chat ID: direct" in runtime_content
-
-    assert messages[-1]["role"] == "user"
-    assert messages[-1]["content"] == "Return exactly: OK"
+    assert "Return exactly: OK" in runtime_content
diff --git a/tests/test_cron_commands.py b/tests/test_cron_commands.py
deleted file mode 100644
index bce1ef5..0000000
--- a/tests/test_cron_commands.py
+++ /dev/null
@@ -1,29 +0,0 @@
-from typer.testing import CliRunner
-
-from nanobot.cli.commands import app
-
-runner = CliRunner()
-
-
-def test_cron_add_rejects_invalid_timezone(monkeypatch, tmp_path) -> None:
-    monkeypatch.setattr("nanobot.config.loader.get_data_dir", lambda: tmp_path)
-
-    result = runner.invoke(
-        app,
-        [
-            "cron",
-            "add",
-            "--name",
-            "demo",
-            "--message",
-            "hello",
-            "--cron",
-            "0 9 * * *",
-            "--tz",
-            "America/Vancovuer",
-        ],
-    )
-
-    assert result.exit_code == 1
-    assert "Error: unknown timezone 'America/Vancovuer'" in result.stdout
-    assert not (tmp_path / "cron" / "jobs.json").exists()
diff --git a/tests/test_cron_service.py b/tests/test_cron_service.py
index 2a36f4c..9631da5 100644
--- a/tests/test_cron_service.py
+++ b/tests/test_cron_service.py
@@ -48,6 +48,8 @@ async def test_running_service_honors_external_disable(tmp_path) -> None:
     )
     await service.start()
     try:
+        # Wait slightly to ensure file mtime is definitively different
+        await asyncio.sleep(0.05)
         external = CronService(store_path)
         updated = external.enable_job(job.id, enabled=False)
         assert updated is not None
diff --git a/tests/test_matrix_channel.py b/tests/test_matrix_channel.py
index c6714c2..c25b95a 100644
--- a/tests/test_matrix_channel.py
+++ b/tests/test_matrix_channel.py
@@ -159,6 +159,7 @@ class _FakeAsyncClient:
 
 
 def _make_config(**kwargs) -> MatrixConfig:
+    kwargs.setdefault("allow_from", ["*"])
     return MatrixConfig(
         enabled=True,
         homeserver="https://matrix.org",
@@ -274,7 +275,7 @@ async def test_stop_stops_sync_forever_before_close(monkeypatch) -> None:
 
 
 @pytest.mark.asyncio
-async def test_room_invite_joins_when_allow_list_is_empty() -> None:
+async def test_room_invite_ignores_when_allow_list_is_empty() -> None:
     channel = MatrixChannel(_make_config(allow_from=[]), MessageBus())
     client = _FakeAsyncClient("", "", "", None)
     channel.client = client
@@ -284,9 +285,22 @@ async def test_room_invite_joins_when_allow_list_is_empty() -> None:
 
     await channel._on_room_invite(room, event)
 
-    assert client.join_calls == ["!room:matrix.org"]
+    assert client.join_calls == []
 
 
+@pytest.mark.asyncio
+async def test_room_invite_joins_when_sender_allowed() -> None:
+    channel = MatrixChannel(_make_config(allow_from=["@alice:matrix.org"]), MessageBus())
+    client = _FakeAsyncClient("", "", "", None)
+    channel.client = client
+
+    room = SimpleNamespace(room_id="!room:matrix.org")
+    event = SimpleNamespace(sender="@alice:matrix.org")
+
+    await channel._on_room_invite(room, event)
+
+    assert client.join_calls == ["!room:matrix.org"]
+
 @pytest.mark.asyncio
 async def test_room_invite_respects_allow_list_when_configured() -> None:
     channel = MatrixChannel(_make_config(allow_from=["@bob:matrix.org"]), MessageBus())
@@ -1163,6 +1177,8 @@ async def test_send_progress_keeps_typing_keepalive_running() -> None:
     assert "!room:matrix.org" in channel._typing_tasks
     assert client.typing_calls[-1] == ("!room:matrix.org", True, TYPING_NOTICE_TIMEOUT_MS)
 
+    await channel.stop()
+
 
 @pytest.mark.asyncio
 async def test_send_clears_typing_when_send_fails() -> None: