diff --git a/airflow/api_fastapi/core_api/routes/public/backfills.py b/airflow/api_fastapi/core_api/routes/public/backfills.py
index e9e93673b8af..3b61e0fedb4d 100644
--- a/airflow/api_fastapi/core_api/routes/public/backfills.py
+++ b/airflow/api_fastapi/core_api/routes/public/backfills.py
@@ -49,7 +49,7 @@
     path="/",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def list_backfills(
+def list_backfills(
     dag_id: str,
     limit: QueryLimit,
     offset: QueryOffset,
@@ -81,7 +81,7 @@ async def list_backfills(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_backfill(
+def get_backfill(
     backfill_id: str,
     session: Annotated[Session, Depends(get_session)],
 ):
@@ -102,7 +102,7 @@ async def get_backfill(
         ]
     ),
 )
-async def pause_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
+def pause_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
     b = session.get(Backfill, backfill_id)
     if not b:
         raise HTTPException(status.HTTP_404_NOT_FOUND, f"Could not find backfill with id {backfill_id}")
@@ -125,7 +125,7 @@ async def pause_backfill(*, backfill_id, session: Annotated[Session, Depends(get
         ]
     ),
 )
-async def unpause_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
+def unpause_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
     b = session.get(Backfill, backfill_id)
     if not b:
         raise HTTPException(status.HTTP_404_NOT_FOUND, f"Could not find backfill with id {backfill_id}")
@@ -147,7 +147,7 @@ async def unpause_backfill(*, backfill_id, session: Annotated[Session, Depends(g
         ]
     ),
 )
-async def cancel_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
+def cancel_backfill(*, backfill_id, session: Annotated[Session, Depends(get_session)]):
     b: Backfill = session.get(Backfill, backfill_id)
     if not b:
         raise HTTPException(status.HTTP_404_NOT_FOUND, f"Could not find backfill with id {backfill_id}")
@@ -194,7 +194,7 @@ async def cancel_backfill(*, backfill_id, session: Annotated[Session, Depends(ge
         ]
     ),
 )
-async def create_backfill(
+def create_backfill(
     backfill_request: BackfillPostBody,
 ):
     from_date = timezone.coerce_datetime(backfill_request.from_date)
diff --git a/airflow/api_fastapi/core_api/routes/public/connections.py b/airflow/api_fastapi/core_api/routes/public/connections.py
index b1b6fb4abeb6..fd378601385a 100644
--- a/airflow/api_fastapi/core_api/routes/public/connections.py
+++ b/airflow/api_fastapi/core_api/routes/public/connections.py
@@ -43,7 +43,7 @@
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def delete_connection(
+def delete_connection(
     connection_id: str,
     session: Annotated[Session, Depends(get_session)],
 ):
@@ -64,7 +64,7 @@ async def delete_connection(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_connection(
+def get_connection(
     connection_id: str,
     session: Annotated[Session, Depends(get_session)],
 ) -> ConnectionResponse:
@@ -85,7 +85,7 @@ async def get_connection(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_connections(
+def get_connections(
     limit: QueryLimit,
     offset: QueryOffset,
     order_by: Annotated[
@@ -125,7 +125,7 @@ async def get_connections(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_409_CONFLICT]
     ),
 )
-async def post_connection(
+def post_connection(
     post_body: ConnectionBody,
     session: Annotated[Session, Depends(get_session)],
 ) -> ConnectionResponse:
@@ -156,7 +156,7 @@ async def post_connection(
         ]
     ),
 )
-async def patch_connection(
+def patch_connection(
     connection_id: str,
     patch_body: ConnectionBody,
     session: Annotated[Session, Depends(get_session)],
diff --git a/airflow/api_fastapi/core_api/routes/public/dag_run.py b/airflow/api_fastapi/core_api/routes/public/dag_run.py
index 7f41573b1dba..b05ed2ba1138 100644
--- a/airflow/api_fastapi/core_api/routes/public/dag_run.py
+++ b/airflow/api_fastapi/core_api/routes/public/dag_run.py
@@ -50,7 +50,7 @@
         ]
     ),
 )
-async def get_dag_run(
+def get_dag_run(
     dag_id: str, dag_run_id: str, session: Annotated[Session, Depends(get_session)]
 ) -> DAGRunResponse:
     dag_run = session.scalar(select(DagRun).filter_by(dag_id=dag_id, run_id=dag_run_id))
@@ -75,7 +75,7 @@ async def get_dag_run(
         ]
     ),
 )
-async def delete_dag_run(dag_id: str, dag_run_id: str, session: Annotated[Session, Depends(get_session)]):
+def delete_dag_run(dag_id: str, dag_run_id: str, session: Annotated[Session, Depends(get_session)]):
     """Delete a DAG Run entry."""
     dag_run = session.scalar(select(DagRun).filter_by(dag_id=dag_id, run_id=dag_run_id))
 
@@ -99,7 +99,7 @@ async def delete_dag_run(dag_id: str, dag_run_id: str, session: Annotated[Sessio
         ]
     ),
 )
-async def patch_dag_run_state(
+def patch_dag_run_state(
     dag_id: str,
     dag_run_id: str,
     patch_body: DAGRunPatchBody,
@@ -138,6 +138,6 @@ async def patch_dag_run_state(
             else:
                 set_dag_run_state_to_failed(dag=dag, run_id=dag_run.run_id, commit=True)
 
-    dag_run = session.get(DagRun, dag_run.id)
+    session.refresh(dag_run)
 
     return DAGRunResponse.model_validate(dag_run, from_attributes=True)
diff --git a/airflow/api_fastapi/core_api/routes/public/dag_sources.py b/airflow/api_fastapi/core_api/routes/public/dag_sources.py
index 3cf046f5b757..1d008e9ad2d1 100644
--- a/airflow/api_fastapi/core_api/routes/public/dag_sources.py
+++ b/airflow/api_fastapi/core_api/routes/public/dag_sources.py
@@ -55,7 +55,7 @@
     },
     response_model=DAGSourceResponse,
 )
-async def get_dag_source(
+def get_dag_source(
     file_token: str,
     session: Annotated[Session, Depends(get_session)],
     request: Request,
diff --git a/airflow/api_fastapi/core_api/routes/public/dag_stats.py b/airflow/api_fastapi/core_api/routes/public/dag_stats.py
index e4bc1c05b16d..5d773703224b 100644
--- a/airflow/api_fastapi/core_api/routes/public/dag_stats.py
+++ b/airflow/api_fastapi/core_api/routes/public/dag_stats.py
@@ -50,7 +50,7 @@
         ]
     ),
 )
-async def get_dag_stats(
+def get_dag_stats(
     session: Annotated[Session, Depends(get_session)],
     dag_ids: QueryDagIdsFilter,
 ) -> DagStatsCollectionResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/dag_warning.py b/airflow/api_fastapi/core_api/routes/public/dag_warning.py
index f445fb0afcf5..a981fd9ed58a 100644
--- a/airflow/api_fastapi/core_api/routes/public/dag_warning.py
+++ b/airflow/api_fastapi/core_api/routes/public/dag_warning.py
@@ -48,7 +48,7 @@
     "/dagWarnings",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def list_dag_warnings(
+def list_dag_warnings(
     dag_id: QueryDagIdInDagWarningFilter,
     warning_type: QueryWarningTypeFilter,
     limit: QueryLimit,
diff --git a/airflow/api_fastapi/core_api/routes/public/dags.py b/airflow/api_fastapi/core_api/routes/public/dags.py
index a36c391e55dc..9a9583ed22a1 100644
--- a/airflow/api_fastapi/core_api/routes/public/dags.py
+++ b/airflow/api_fastapi/core_api/routes/public/dags.py
@@ -58,7 +58,7 @@
 
 
 @dags_router.get("/")
-async def get_dags(
+def get_dags(
     limit: QueryLimit,
     offset: QueryOffset,
     tags: QueryTagsFilter,
@@ -101,7 +101,7 @@ async def get_dags(
     "/tags",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def get_dag_tags(
+def get_dag_tags(
     limit: QueryLimit,
     offset: QueryOffset,
     order_by: Annotated[
@@ -142,9 +142,7 @@ async def get_dag_tags(
         ]
     ),
 )
-async def get_dag(
-    dag_id: str, session: Annotated[Session, Depends(get_session)], request: Request
-) -> DAGResponse:
+def get_dag(dag_id: str, session: Annotated[Session, Depends(get_session)], request: Request) -> DAGResponse:
     """Get basic information about a DAG."""
     dag: DAG = request.app.state.dag_bag.get_dag(dag_id)
     if not dag:
@@ -172,7 +170,7 @@ async def get_dag(
         ]
     ),
 )
-async def get_dag_details(
+def get_dag_details(
     dag_id: str, session: Annotated[Session, Depends(get_session)], request: Request
 ) -> DAGDetailsResponse:
     """Get details of DAG."""
@@ -202,7 +200,7 @@ async def get_dag_details(
         ]
     ),
 )
-async def patch_dag(
+def patch_dag(
     dag_id: str,
     patch_body: DAGPatchBody,
     session: Annotated[Session, Depends(get_session)],
@@ -241,7 +239,7 @@ async def patch_dag(
         ]
     ),
 )
-async def patch_dags(
+def patch_dags(
     patch_body: DAGPatchBody,
     limit: QueryLimit,
     offset: QueryOffset,
@@ -301,7 +299,7 @@ async def patch_dags(
         ]
     ),
 )
-async def delete_dag(
+def delete_dag(
     dag_id: str,
     session: Annotated[Session, Depends(get_session)],
 ) -> Response:
diff --git a/airflow/api_fastapi/core_api/routes/public/event_logs.py b/airflow/api_fastapi/core_api/routes/public/event_logs.py
index 462c26696957..510846b67c47 100644
--- a/airflow/api_fastapi/core_api/routes/public/event_logs.py
+++ b/airflow/api_fastapi/core_api/routes/public/event_logs.py
@@ -49,7 +49,7 @@
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_event_log(
+def get_event_log(
     event_log_id: int,
     session: Annotated[Session, Depends(get_session)],
 ) -> EventLogResponse:
@@ -66,7 +66,7 @@ async def get_event_log(
     "/",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def get_event_logs(
+def get_event_logs(
     limit: QueryLimit,
     offset: QueryOffset,
     session: Annotated[Session, Depends(get_session)],
diff --git a/airflow/api_fastapi/core_api/routes/public/import_error.py b/airflow/api_fastapi/core_api/routes/public/import_error.py
index 9007d6ff891b..a067a7608fe7 100644
--- a/airflow/api_fastapi/core_api/routes/public/import_error.py
+++ b/airflow/api_fastapi/core_api/routes/public/import_error.py
@@ -47,7 +47,7 @@
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_import_error(
+def get_import_error(
     import_error_id: int,
     session: Annotated[Session, Depends(get_session)],
 ) -> ImportErrorResponse:
@@ -66,7 +66,7 @@ async def get_import_error(
     "/",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def get_import_errors(
+def get_import_errors(
     limit: QueryLimit,
     offset: QueryOffset,
     order_by: Annotated[
diff --git a/airflow/api_fastapi/core_api/routes/public/monitor.py b/airflow/api_fastapi/core_api/routes/public/monitor.py
index e5d746e15c24..d855e7bdebf4 100644
--- a/airflow/api_fastapi/core_api/routes/public/monitor.py
+++ b/airflow/api_fastapi/core_api/routes/public/monitor.py
@@ -25,6 +25,6 @@
 
 
 @monitor_router.get("/health")
-async def get_health() -> HealthInfoSchema:
+def get_health() -> HealthInfoSchema:
     airflow_health_status = get_airflow_health()
     return HealthInfoSchema.model_validate(airflow_health_status)
diff --git a/airflow/api_fastapi/core_api/routes/public/plugins.py b/airflow/api_fastapi/core_api/routes/public/plugins.py
index c264e748373c..516344e9b3a2 100644
--- a/airflow/api_fastapi/core_api/routes/public/plugins.py
+++ b/airflow/api_fastapi/core_api/routes/public/plugins.py
@@ -26,7 +26,7 @@
 
 
 @plugins_router.get("/")
-async def get_plugins(
+def get_plugins(
     limit: QueryLimit,
     offset: QueryOffset,
 ) -> PluginCollectionResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/pools.py b/airflow/api_fastapi/core_api/routes/public/pools.py
index 99389e0bd6e9..5b58c83d8aa2 100644
--- a/airflow/api_fastapi/core_api/routes/public/pools.py
+++ b/airflow/api_fastapi/core_api/routes/public/pools.py
@@ -51,7 +51,7 @@
         ]
     ),
 )
-async def delete_pool(
+def delete_pool(
     pool_name: str,
     session: Annotated[Session, Depends(get_session)],
 ):
@@ -71,7 +71,7 @@ async def delete_pool(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_pool(
+def get_pool(
     pool_name: str,
     session: Annotated[Session, Depends(get_session)],
 ) -> PoolResponse:
@@ -89,7 +89,7 @@ async def get_pool(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_pools(
+def get_pools(
     limit: QueryLimit,
     offset: QueryOffset,
     order_by: Annotated[
@@ -127,7 +127,7 @@ async def get_pools(
         ]
     ),
 )
-async def patch_pool(
+def patch_pool(
     pool_name: str,
     patch_body: PoolPatchBody,
     session: Annotated[Session, Depends(get_session)],
@@ -170,7 +170,7 @@ async def patch_pool(
     status_code=status.HTTP_201_CREATED,
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def post_pool(
+def post_pool(
     post_body: PoolPostBody,
     session: Annotated[Session, Depends(get_session)],
 ) -> PoolResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/providers.py b/airflow/api_fastapi/core_api/routes/public/providers.py
index 6c01578dd5f6..0386404f420d 100644
--- a/airflow/api_fastapi/core_api/routes/public/providers.py
+++ b/airflow/api_fastapi/core_api/routes/public/providers.py
@@ -40,7 +40,7 @@ def _provider_mapper(provider: ProviderInfo) -> ProviderResponse:
 
 
 @providers_router.get("/")
-async def get_providers(
+def get_providers(
     limit: QueryLimit,
     offset: QueryOffset,
 ) -> ProviderCollectionResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/task_instances.py b/airflow/api_fastapi/core_api/routes/public/task_instances.py
index be76d1922548..9d74ed273111 100644
--- a/airflow/api_fastapi/core_api/routes/public/task_instances.py
+++ b/airflow/api_fastapi/core_api/routes/public/task_instances.py
@@ -60,7 +60,7 @@
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_task_instance(
+def get_task_instance(
     dag_id: str, dag_run_id: str, task_id: str, session: Annotated[Session, Depends(get_session)]
 ) -> TaskInstanceResponse:
     """Get task instance."""
@@ -236,7 +236,7 @@ async def get_task_instance_dependencies(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_mapped_task_instance(
+def get_mapped_task_instance(
     dag_id: str,
     dag_run_id: str,
     task_id: str,
diff --git a/airflow/api_fastapi/core_api/routes/public/variables.py b/airflow/api_fastapi/core_api/routes/public/variables.py
index 6ed680cd7bc2..ac1be6e6edb0 100644
--- a/airflow/api_fastapi/core_api/routes/public/variables.py
+++ b/airflow/api_fastapi/core_api/routes/public/variables.py
@@ -42,7 +42,7 @@
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def delete_variable(
+def delete_variable(
     variable_key: str,
     session: Annotated[Session, Depends(get_session)],
 ):
@@ -59,7 +59,7 @@ async def delete_variable(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_variable(
+def get_variable(
     variable_key: str,
     session: Annotated[Session, Depends(get_session)],
 ) -> VariableResponse:
@@ -78,7 +78,7 @@ async def get_variable(
     "/",
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def get_variables(
+def get_variables(
     limit: QueryLimit,
     offset: QueryOffset,
     order_by: Annotated[
@@ -121,7 +121,7 @@ async def get_variables(
         ]
     ),
 )
-async def patch_variable(
+def patch_variable(
     variable_key: str,
     patch_body: VariableBody,
     session: Annotated[Session, Depends(get_session)],
@@ -154,7 +154,7 @@ async def patch_variable(
     status_code=status.HTTP_201_CREATED,
     responses=create_openapi_http_exception_doc([status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN]),
 )
-async def post_variable(
+def post_variable(
     post_body: VariableBody,
     session: Annotated[Session, Depends(get_session)],
 ) -> VariableResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/version.py b/airflow/api_fastapi/core_api/routes/public/version.py
index 218e0b90702d..b2ca6fef6ae2 100644
--- a/airflow/api_fastapi/core_api/routes/public/version.py
+++ b/airflow/api_fastapi/core_api/routes/public/version.py
@@ -26,7 +26,7 @@
 
 
 @version_router.get("/")
-async def get_version() -> VersionInfo:
+def get_version() -> VersionInfo:
     """Get version information."""
     airflow_version = airflow.__version__
     git_version = get_airflow_git_version()
diff --git a/airflow/api_fastapi/core_api/routes/ui/assets.py b/airflow/api_fastapi/core_api/routes/ui/assets.py
index 3b98e4f59a3c..b9c07124277f 100644
--- a/airflow/api_fastapi/core_api/routes/ui/assets.py
+++ b/airflow/api_fastapi/core_api/routes/ui/assets.py
@@ -31,7 +31,7 @@
 
 
 @assets_router.get("/next_run_assets/{dag_id}", include_in_schema=False)
-async def next_run_assets(
+def next_run_assets(
     dag_id: str,
     request: Request,
     session: Annotated[Session, Depends(get_session)],
diff --git a/airflow/api_fastapi/core_api/routes/ui/dags.py b/airflow/api_fastapi/core_api/routes/ui/dags.py
index 665373734bb9..14d0c72458d1 100644
--- a/airflow/api_fastapi/core_api/routes/ui/dags.py
+++ b/airflow/api_fastapi/core_api/routes/ui/dags.py
@@ -50,7 +50,7 @@
 
 
 @dags_router.get("/recent_dag_runs", include_in_schema=False, response_model_exclude_none=True)
-async def recent_dag_runs(
+def recent_dag_runs(
     limit: QueryLimit,
     offset: QueryOffset,
     tags: QueryTagsFilter,
diff --git a/airflow/api_fastapi/core_api/routes/ui/dashboard.py b/airflow/api_fastapi/core_api/routes/ui/dashboard.py
index 3cb39e4e8b21..ada47f2fe853 100644
--- a/airflow/api_fastapi/core_api/routes/ui/dashboard.py
+++ b/airflow/api_fastapi/core_api/routes/ui/dashboard.py
@@ -44,7 +44,7 @@
     include_in_schema=False,
     responses=create_openapi_http_exception_doc([status.HTTP_400_BAD_REQUEST]),
 )
-async def historical_metrics(
+def historical_metrics(
     start_date: DateTimeQuery,
     end_date: DateTimeQuery,
     session: Annotated[Session, Depends(get_session)],
diff --git a/airflow/api_fastapi/execution_api/routes/health.py b/airflow/api_fastapi/execution_api/routes/health.py
index e0d51e3c7145..c8d903815dc6 100644
--- a/airflow/api_fastapi/execution_api/routes/health.py
+++ b/airflow/api_fastapi/execution_api/routes/health.py
@@ -23,5 +23,5 @@
 
 
 @health_router.get("/health")
-async def health() -> dict:
+def health() -> dict:
     return {"status": "healthy"}
diff --git a/airflow/api_fastapi/execution_api/routes/task_instance.py b/airflow/api_fastapi/execution_api/routes/task_instance.py
index ddf4055d4d01..8f6331f5a599 100644
--- a/airflow/api_fastapi/execution_api/routes/task_instance.py
+++ b/airflow/api_fastapi/execution_api/routes/task_instance.py
@@ -56,7 +56,7 @@
         status.HTTP_422_UNPROCESSABLE_ENTITY: {"description": "Invalid payload for the state transition"},
     },
 )
-async def ti_update_state(
+def ti_update_state(
     task_instance_id: UUID,
     ti_patch_payload: Annotated[schemas.TIStateUpdate, Body()],
     session: Annotated[Session, Depends(get_session)],
@@ -144,7 +144,7 @@ async def ti_update_state(
         status.HTTP_422_UNPROCESSABLE_ENTITY: {"description": "Invalid payload for the state transition"},
     },
 )
-async def ti_heartbeat(
+def ti_heartbeat(
     task_instance_id: UUID,
     ti_payload: schemas.TIHeartbeatInfo,
     session: Annotated[Session, Depends(get_session)],
diff --git a/airflow/settings.py b/airflow/settings.py
index 89c77a2abfe3..9a1801ccc41c 100644
--- a/airflow/settings.py
+++ b/airflow/settings.py
@@ -459,6 +459,12 @@ def configure_orm(disable_connection_pool=False, pool_class=None):
     else:
         connect_args = {}
 
+    if os.environ.get("AIRFLOW__CORE__UNIT_TEST_MODE") == "True" and os.environ.get("BACKEND") == "sqlite":
+        # FastAPI runs sync endpoints in a separate thread. SQLite does note allow
+        # to use objects created in another threads by default. Allowing that in test
+        # to so the `test` thread and the tested endpoints can use common objects.
+        connect_args["check_same_thread"] = False
+
     engine = create_engine(SQL_ALCHEMY_CONN, connect_args=connect_args, **engine_args, future=True)
 
     mask_secret(engine.url.password)
diff --git a/tests/api_fastapi/core_api/routes/public/test_dag_run.py b/tests/api_fastapi/core_api/routes/public/test_dag_run.py
index dfd48af2fa53..6c48cece798d 100644
--- a/tests/api_fastapi/core_api/routes/public/test_dag_run.py
+++ b/tests/api_fastapi/core_api/routes/public/test_dag_run.py
@@ -156,7 +156,7 @@ def test_patch_dag_run(self, test_client, dag_id, run_id, state, response_state)
         assert body["state"] == response_state
 
     @pytest.mark.parametrize(
-        "query_params,patch_body, expected_status_code",
+        "query_params, patch_body, expected_status_code",
         [
             ({"update_mask": ["state"]}, {"state": DagRunState.SUCCESS}, 200),
             ({}, {"state": DagRunState.SUCCESS}, 200),
diff --git a/tests/core/test_sqlalchemy_config.py b/tests/core/test_sqlalchemy_config.py
index 1ce879683400..4f0a3e843a73 100644
--- a/tests/core/test_sqlalchemy_config.py
+++ b/tests/core/test_sqlalchemy_config.py
@@ -17,6 +17,7 @@
 # under the License.
 from __future__ import annotations
 
+import os
 from unittest.mock import patch
 
 import pytest
@@ -59,7 +60,7 @@ def test_configure_orm_with_default_values(
         settings.configure_orm()
         mock_create_engine.assert_called_once_with(
             settings.SQL_ALCHEMY_CONN,
-            connect_args={},
+            connect_args={} if os.environ["BACKEND"] != "sqlite" else {"check_same_thread": False},
             encoding="utf-8",
             max_overflow=10,
             pool_pre_ping=True,