diff --git a/docker/clickhouse/config.d/dev-memory.xml b/docker/clickhouse/config.d/dev-memory.xml
index f3c7a6c5cc..6c5819743a 100644
--- a/docker/clickhouse/config.d/dev-memory.xml
+++ b/docker/clickhouse/config.d/dev-memory.xml
@@ -4,5 +4,4 @@
     <mark_cache_size>268435456</mark_cache_size> <!-- 256MB -->
     <uncompressed_cache_size>268435456</uncompressed_cache_size> <!-- 256MB -->
     <cache_size_to_ram_max_ratio>0.25</cache_size_to_ram_max_ratio>
-    <max_server_memory_usage_to_ram_ratio replace="true">0.6</max_server_memory_usage_to_ram_ratio>
 </clickhouse>
diff --git a/posthog/temporal/tests/data_modeling/test_run_workflow.py b/posthog/temporal/tests/data_modeling/test_run_workflow.py
index 1cdfaeb7c0..e75755ca50 100644
--- a/posthog/temporal/tests/data_modeling/test_run_workflow.py
+++ b/posthog/temporal/tests/data_modeling/test_run_workflow.py
@@ -45,7 +45,7 @@ from posthog.temporal.data_modeling.run_workflow import (
     run_dag_activity,
     start_run_activity,
 )
-from posthog.temporal.tests.utils.events import generate_test_events_in_clickhouse
+from posthog.temporal.tests.utils.events import generate_test_events_in_clickhouse, truncate_table
 from posthog.warehouse.models.data_modeling_job import DataModelingJob
 from posthog.warehouse.models.datawarehouse_saved_query import DataWarehouseSavedQuery
 from posthog.warehouse.models.modeling import DataWarehouseModelPath
@@ -271,7 +271,12 @@ def mock_to_object_store_rs_credentials(class_self):
 
 
 @pytest_asyncio.fixture
-async def pageview_events(clickhouse_client, ateam):
+async def truncate_events_table(clickhouse_client):
+    await truncate_table(clickhouse_client, "sharded_events")
+
+
+@pytest_asyncio.fixture
+async def pageview_events(clickhouse_client, ateam, truncate_events_table):
     start_time, end_time = dt.datetime.now(dt.UTC) - dt.timedelta(days=1), dt.datetime.now(dt.UTC)
     events, _, events_from_other_team = await generate_test_events_in_clickhouse(
         clickhouse_client,
@@ -916,7 +921,7 @@ async def test_run_workflow_revert_materialization(
     workflow_id = str(uuid.uuid4())
     inputs = RunWorkflowInputs(team_id=ateam.pk)
 
-    async def mock_hogql_table(_query, _team, _logger):
+    def mock_hogql_table(_query, _team, _logger):
         raise Exception("Unknown table")
 
     with (
@@ -1295,7 +1300,7 @@ async def test_materialize_model_progress_tracking(ateam, bucket_name, minio_cli
         assert job.rows_expected == 6
 
 
-async def test_materialize_model_with_non_utc_timestamp(ateam, bucket_name, minio_client):
+async def test_materialize_model_with_non_utc_timestamp(ateam, bucket_name, minio_client, truncate_events_table):
     await sync_to_async(bulk_create_events)(
         [{"event": "user signed up", "distinct_id": "1", "team": ateam, "timestamp": "2022-01-01T12:00:00"}]
     )
@@ -1344,7 +1349,7 @@ async def test_materialize_model_with_non_utc_timestamp(ateam, bucket_name, mini
         assert job.status == DataModelingJob.Status.COMPLETED
 
 
-async def test_materialize_model_with_utc_timestamp(ateam, bucket_name, minio_client):
+async def test_materialize_model_with_utc_timestamp(ateam, bucket_name, minio_client, truncate_events_table):
     await sync_to_async(bulk_create_events)(
         [{"event": "user signed up", "distinct_id": "1", "team": ateam, "timestamp": "2022-01-01T00:00:00"}]
     )
@@ -1393,7 +1398,7 @@ async def test_materialize_model_with_utc_timestamp(ateam, bucket_name, minio_cl
         assert job.status == DataModelingJob.Status.COMPLETED
 
 
-async def test_materialize_model_with_date(ateam, bucket_name, minio_client):
+async def test_materialize_model_with_date(ateam, bucket_name, minio_client, truncate_events_table):
     await sync_to_async(bulk_create_events)(
         [{"event": "user signed up", "distinct_id": "1", "team": ateam, "timestamp": "2022-01-01T12:00:00"}]
     )
@@ -1442,7 +1447,7 @@ async def test_materialize_model_with_date(ateam, bucket_name, minio_client):
         assert job.status == DataModelingJob.Status.COMPLETED
 
 
-async def test_materialize_model_with_plain_datetime(ateam, bucket_name, minio_client):
+async def test_materialize_model_with_plain_datetime(ateam, bucket_name, minio_client, truncate_events_table):
     await sync_to_async(bulk_create_events)(
         [{"event": "user signed up", "distinct_id": "1", "team": ateam, "timestamp": "2022-01-01T12:00:00"}]
     )
diff --git a/posthog/temporal/tests/utils/events.py b/posthog/temporal/tests/utils/events.py
index cc96bfbafc..8423f9fd6f 100644
--- a/posthog/temporal/tests/utils/events.py
+++ b/posthog/temporal/tests/utils/events.py
@@ -117,6 +117,10 @@ def generate_test_events(
     return events
 
 
+async def truncate_table(client: ClickHouseClient, table: str):
+    await execute_query(client, f"TRUNCATE TABLE IF EXISTS `{table}`")
+
+
 async def insert_event_values_in_clickhouse(
     client: ClickHouseClient, events: list[EventValues], table: str = "sharded_events", insert_sessions: bool = False
 ):