diff --git a/invokeai/app/services/batch_manager.py b/invokeai/app/services/batch_manager.py
index d6432d5fc7..671a323e01 100644
--- a/invokeai/app/services/batch_manager.py
+++ b/invokeai/app/services/batch_manager.py
@@ -104,6 +104,7 @@ class BatchManager(BatchManagerBase):
             batch_session.session_id,
             changes,
         )
+        sessions = self.get_sessions(batch_session.batch_id)
         batch_process = self.__batch_process_storage.get(batch_session.batch_id)
         if not batch_process.canceled:
             self.run_batch_process(batch_process.batch_id)
diff --git a/pyproject.toml b/pyproject.toml
index 4b06944b33..b66ae6fbef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -102,6 +102,7 @@ dependencies = [
   "flake8",
   "Flake8-pyproject",
   "pytest>6.0.0",
+  "pytest-asyncio",
   "pytest-cov",
   "pytest-datadir",
 ]
@@ -176,6 +177,7 @@ version = { attr = "invokeai.version.__version__" }
 #=== Begin: PyTest and Coverage
 [tool.pytest.ini_options]
 addopts = "--cov-report term --cov-report html --cov-report xml"
+asyncio_mode = "auto"
 [tool.coverage.run]
 branch = true
 source = ["invokeai"]
diff --git a/tests/nodes/test_invoker.py b/tests/nodes/test_invoker.py
index 905675115a..e519d5a51d 100644
--- a/tests/nodes/test_invoker.py
+++ b/tests/nodes/test_invoker.py
@@ -6,12 +6,14 @@ from .test_nodes import (
     create_edge,
     wait_until,
 )
+# from fastapi_events.handlers.local import 
 from invokeai.app.services.invocation_queue import MemoryInvocationQueue
 from invokeai.app.services.processor import DefaultInvocationProcessor
 from invokeai.app.services.sqlite import SqliteItemStorage, sqlite_memory
 from invokeai.app.services.invoker import Invoker
 from invokeai.app.services.invocation_services import InvocationServices
 from invokeai.app.services.invocation_stats import InvocationStatsService
+from invokeai.app.api.events import FastAPIEventService
 from invokeai.app.services.batch_manager_storage import BatchData, SqliteBatchProcessStorage
 from invokeai.app.services.batch_manager import (
     Batch,
@@ -24,7 +26,14 @@ from invokeai.app.services.graph import (
     LibraryGraph,
 )
 import pytest
+import pytest_asyncio
 import sqlite3
+import time
+
+from httpx import AsyncClient
+from fastapi import FastAPI
+from fastapi_events.handlers.local import local_handler
+from fastapi_events.middleware import EventHandlerASGIMiddleware
 
 
 @pytest.fixture
@@ -114,19 +123,42 @@ def batch_with_subgraph():
         ]
     )
 
+# @pytest_asyncio.fixture(scope="module")
+# def event_loop():
+#     import asyncio
+#     try:
+#         loop = asyncio.get_running_loop()
+#     except RuntimeError as e:
+#         loop = asyncio.new_event_loop()
+#         asyncio.set_event_loop(loop)
+#     # fastapi_events.event_store
+#     yield loop
+#     loop.close()
+
+@pytest.fixture(scope="session")
+def db_conn():
+    return sqlite3.connect(sqlite_memory, check_same_thread=False)
 
 # This must be defined here to avoid issues with the dynamic creation of the union of all invocation types
 # Defining it in a separate module will cause the union to be incomplete, and pydantic will not validate
 # the test invocations.
-@pytest.fixture
-def mock_services() -> InvocationServices:
+@pytest.fixture(autouse=True)
+async def mock_services(db_conn : sqlite3.Connection) -> InvocationServices:
+    app = FastAPI()
+    event_handler_id: int = id(app)
+    app.add_middleware(
+        EventHandlerASGIMiddleware,
+        handlers=[local_handler],  # TODO: consider doing this in services to support different configurations
+        middleware_id=event_handler_id,
+    )
+    client = AsyncClient(app=app)
     # NOTE: none of these are actually called by the test invocations
-    db_conn = sqlite3.connect(sqlite_memory, check_same_thread=False)
     graph_execution_manager = SqliteItemStorage[GraphExecutionState](conn=db_conn, table_name="graph_executions")
     batch_manager_storage = SqliteBatchProcessStorage(conn=db_conn)
+    events = FastAPIEventService(event_handler_id)
     return InvocationServices(
         model_manager=None,  # type: ignore
-        events=TestEventService(),
+        events=events,
         logger=None,  # type: ignore
         images=None,  # type: ignore
         latents=None,  # type: ignore
@@ -238,6 +270,21 @@ def test_can_create_batch_with_subgraph(mock_invoker: Invoker, graph_with_subgra
 
     # wait_until(lambda: has_executed_all_batches(batch_process_res.batch_id), timeout=10, interval=1)
 
+async def test_can_run_batch_with_subgraph(mock_invoker: Invoker, graph_with_subgraph, batch_with_subgraph):
+    batch_process_res = mock_invoker.services.batch_manager.create_batch_process(
+        batch=batch_with_subgraph,
+        graph=graph_with_subgraph,
+    )
+    mock_invoker.services.batch_manager.run_batch_process(batch_process_res.batch_id)
+    sessions = []
+    attempts = 0
+    import asyncio
+    while len(sessions) != 25 and attempts < 20:
+        batch = mock_invoker.services.batch_manager.get_batch(batch_process_res.batch_id)
+        sessions = mock_invoker.services.batch_manager.get_sessions(batch_process_res.batch_id)
+        await asyncio.sleep(1)
+        attempts += 1
+    assert len(sessions) == 25
 
 def test_can_create_batch(mock_invoker: Invoker, simple_graph, simple_batch):
     batch_process_res = mock_invoker.services.batch_manager.create_batch_process(