diff --git a/posthog/temporal/batch_exports/redshift_batch_export.py b/posthog/temporal/batch_exports/redshift_batch_export.py
index 4229c294a12f53..52ce4e9db32ccc 100644
--- a/posthog/temporal/batch_exports/redshift_batch_export.py
+++ b/posthog/temporal/batch_exports/redshift_batch_export.py
@@ -166,7 +166,7 @@ def get_redshift_fields_from_record_schema(
 
 
 async def insert_records_to_redshift(
-    records: collections.abc.AsyncGenerator[dict[str, typing.Any]],
+    records: collections.abc.AsyncGenerator[dict[str, typing.Any], None],
     redshift_connection: psycopg.AsyncConnection,
     schema: str | None,
     table: str,
@@ -382,7 +382,7 @@ def map_to_record(row: dict) -> dict:
 
                 return record
 
-            async def record_generator() -> collections.abc.AsyncGenerator[dict[str, typing.Any]]:
+            async def record_generator() -> collections.abc.AsyncGenerator[dict[str, typing.Any], None]:
                 async for record_batch in record_iterator:
                     for record in record_batch.to_pylist():
                         yield map_to_record(record)
diff --git a/posthog/temporal/common/asyncpa.py b/posthog/temporal/common/asyncpa.py
index 9d40c847f9d906..c301538a50eb0f 100644
--- a/posthog/temporal/common/asyncpa.py
+++ b/posthog/temporal/common/asyncpa.py
@@ -100,7 +100,7 @@ class AsyncRecordBatchReader:
 
     def __init__(self, bytes_iter: typing.AsyncIterator[bytes]) -> None:
         self._reader = AsyncMessageReader(bytes_iter)
-        self._schema = None
+        self._schema: None | pa.Schema = None
 
     def __aiter__(self) -> "AsyncRecordBatchReader":
         return self
diff --git a/posthog/temporal/tests/batch_exports/conftest.py b/posthog/temporal/tests/batch_exports/conftest.py
index e679f729696717..6664c3bd7f5b17 100644
--- a/posthog/temporal/tests/batch_exports/conftest.py
+++ b/posthog/temporal/tests/batch_exports/conftest.py
@@ -3,8 +3,6 @@
 import pytest_asyncio
 from psycopg import sql
 
-from posthog.batch_exports.service import BatchExportModel
-
 
 @pytest.fixture
 def interval(request) -> str:
@@ -59,19 +57,6 @@ def batch_export_schema(request) -> dict | None:
         return None
 
 
-@pytest.fixture
-def batch_export_model(request) -> BatchExportModel | None:
-    """A parametrizable fixture to configure a batch export schema.
-
-    By decorating a test function with @pytest.mark.parametrize("batch_export_model", ..., indirect=True)
-    it's possible to set the batch_export_schema that will be used to create a BatchExport.
-    """
-    try:
-        return request.param
-    except AttributeError:
-        return BatchExportModel(name="events")
-
-
 @pytest_asyncio.fixture
 async def setup_postgres_test_db(postgres_config):
     """Fixture to manage a database for Redshift and Postgres export testing.