diff --git a/api/tests/test_containers_integration_tests/.ruff.toml b/api/tests/test_containers_integration_tests/.ruff.toml
new file mode 100644
index 0000000000..be0109f462
--- /dev/null
+++ b/api/tests/test_containers_integration_tests/.ruff.toml
@@ -0,0 +1,19 @@
+extend = "../../.ruff.toml"
+src = ["../.."]
+
+[lint]
+extend-select = ["ANN401", "TID251"]
+
+[lint.per-file-ignores]
+"**/*.py" = ["S110", "T201"]
+"core/rag/pipeline/test_queue_integration.py" = ["ANN401", "TID251"]
+"models/test_types_enum_text.py" = ["ANN401", "TID251"]
+"services/test_app_dsl_service.py" = ["ANN401", "TID251"]
+"services/test_file_service_zip_and_lookup.py" = ["ANN401", "TID251"]
+"services/test_hit_testing_service.py" = ["ANN401", "TID251"]
+"services/test_recommended_app_service.py" = ["ANN401", "TID251"]
+"trigger/conftest.py" = ["ANN401", "TID251"]
+"trigger/test_trigger_e2e.py" = ["ANN401", "TID251"]
+
+[lint.flake8-tidy-imports.banned-api."typing.Any"]
+msg = "Use object, Protocol, TypedDict, TypeVar, ParamSpec, or a localized cast instead."
diff --git a/api/tests/test_containers_integration_tests/conftest.py b/api/tests/test_containers_integration_tests/conftest.py
index dd742f99d0..2ee9ae68b2 100644
--- a/api/tests/test_containers_integration_tests/conftest.py
+++ b/api/tests/test_containers_integration_tests/conftest.py
@@ -41,7 +41,7 @@ SANDBOX_TEST_IMAGE_ENV = "DIFY_SANDBOX_TEST_IMAGE"
 class _CloserProtocol(Protocol):
     """_Closer is any type which implement the close() method."""
 
-    def close(self):
+    def close(self) -> None:
         """close the current object, release any external resouece (file, transaction, connection etc.)
         associated with it.
         """
@@ -67,7 +67,7 @@ class DifyTestContainers:
     caches, and search engines.
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize container management with default configurations."""
         self.network: Network | None = None
         self.postgres: PostgresContainer | None = None
@@ -77,7 +77,7 @@ class DifyTestContainers:
         self._containers_started = False
         logger.info("DifyTestContainers initialized - ready to manage test containers")
 
-    def start_containers_with_env(self):
+    def start_containers_with_env(self) -> None:
         """
         Start all required containers for integration testing.
 
@@ -199,6 +199,8 @@ class DifyTestContainers:
         # Get container internal network addresses
         postgres_container_name = self.postgres.get_wrapped_container().name
         redis_container_name = self.redis.get_wrapped_container().name
+        assert postgres_container_name is not None
+        assert redis_container_name is not None
 
         self.dify_plugin_daemon.env = {
             "DB_HOST": postgres_container_name,  # Use container name for internal network communication
@@ -251,7 +253,7 @@ class DifyTestContainers:
         self._containers_started = True
         logger.info("All test containers started successfully")
 
-    def stop_containers(self):
+    def stop_containers(self) -> None:
         """
         Stop and clean up all test containers.
 
@@ -290,7 +292,7 @@ def _get_migration_dir() -> Path:
     return conftest_dir.parent.parent / "migrations"
 
 
-def _get_engine_url(engine: Engine):
+def _get_engine_url(engine: Engine) -> str:
     try:
         return engine.url.render_as_string(hide_password=False).replace("%", "%%")
     except AttributeError:
@@ -409,7 +411,7 @@ def set_up_containers_and_env() -> Generator[DifyTestContainers, None, None]:
 
 
 @pytest.fixture(scope="session")
-def flask_app_with_containers(set_up_containers_and_env) -> Flask:
+def flask_app_with_containers(set_up_containers_and_env: DifyTestContainers) -> Flask:
     """
     Session-scoped Flask application fixture using test containers.
 
@@ -552,6 +554,7 @@ def isolate_container_database(request: pytest.FixtureRequest) -> Generator[None
         return
 
     app = request.getfixturevalue("flask_app_with_containers")
+    assert isinstance(app, Flask)
     try:
         _truncate_container_database(app)
     finally:
@@ -559,7 +562,7 @@ def isolate_container_database(request: pytest.FixtureRequest) -> Generator[None
 
 
 @pytest.fixture(scope="package", autouse=True)
-def mock_ssrf_proxy_requests():
+def mock_ssrf_proxy_requests() -> Generator[None, None, None]:
     """
     Avoid outbound network during containerized tests by stubbing SSRF proxy helpers.
     """
@@ -568,7 +571,7 @@ def mock_ssrf_proxy_requests():
 
     import httpx
 
-    def _fake_request(method, url, **kwargs):
+    def _fake_request(method: str, url: str, **_kwargs: object) -> httpx.Response:
         request = httpx.Request(method=method, url=url)
         return httpx.Response(200, request=request, content=b"")
 
diff --git a/api/tests/test_containers_integration_tests/controllers/console/workspace/test_members.py b/api/tests/test_containers_integration_tests/controllers/console/workspace/test_members.py
index 3c1688293e..1c84b70b08 100644
--- a/api/tests/test_containers_integration_tests/controllers/console/workspace/test_members.py
+++ b/api/tests/test_containers_integration_tests/controllers/console/workspace/test_members.py
@@ -1,9 +1,14 @@
 from __future__ import annotations
 
+import inspect
+from collections.abc import Callable
+from typing import cast
 from unittest.mock import patch
 from uuid import uuid4
 
 import pytest
+from flask import Flask
+from sqlalchemy.orm import Session
 from werkzeug.exceptions import HTTPException
 
 import services
@@ -12,16 +17,33 @@ from controllers.console.workspace import members as members_module
 from controllers.console.workspace.members import MemberCancelInviteApi, MemberUpdateRoleApi, OwnerTransfer
 from models.account import Account, Tenant, TenantAccountJoin, TenantAccountRole, TenantStatus
 
+JsonResponse = dict[str, object]
+StatusResponse = tuple[JsonResponse, int]
 
-def unwrap(func):
-    while hasattr(func, "__wrapped__"):
-        func = func.__wrapped__
-    return func
+
+def unwrap(func: Callable[..., object]) -> Callable[..., object]:
+    return cast(Callable[..., object], inspect.unwrap(func))
+
+
+def unwrap_status_response(func: Callable[..., object]) -> Callable[..., StatusResponse]:
+    return cast(Callable[..., StatusResponse], inspect.unwrap(func))
+
+
+def unwrap_json_response(func: Callable[..., object]) -> Callable[..., JsonResponse]:
+    return cast(Callable[..., JsonResponse], inspect.unwrap(func))
+
+
+def unwrap_json_or_status_response(func: Callable[..., object]) -> Callable[..., JsonResponse | StatusResponse]:
+    return cast(Callable[..., JsonResponse | StatusResponse], inspect.unwrap(func))
+
+
+def unwrap_raises(func: Callable[..., object]) -> Callable[..., object]:
+    return unwrap(func)
 
 
 class WorkspaceMembersIntegrationFactory:
     @staticmethod
-    def create_tenant(db_session_with_containers) -> Tenant:
+    def create_tenant(db_session_with_containers: Session) -> Tenant:
         tenant = Tenant(name=f"Tenant {uuid4()}", plan="basic", status=TenantStatus.NORMAL)
         db_session_with_containers.add(tenant)
         db_session_with_containers.commit()
@@ -29,7 +51,7 @@ class WorkspaceMembersIntegrationFactory:
 
     @staticmethod
     def create_account(
-        db_session_with_containers,
+        db_session_with_containers: Session,
         *,
         email_prefix: str,
         tenant: Tenant | None = None,
@@ -60,7 +82,7 @@ class WorkspaceMembersIntegrationFactory:
         return account
 
     @staticmethod
-    def create_owner_workspace(db_session_with_containers) -> tuple[Tenant, Account]:
+    def create_owner_workspace(db_session_with_containers: Session) -> tuple[Tenant, Account]:
         tenant = WorkspaceMembersIntegrationFactory.create_tenant(db_session_with_containers)
         owner = WorkspaceMembersIntegrationFactory.create_account(
             db_session_with_containers,
@@ -82,7 +104,7 @@ class WorkspaceMembersIntegrationFactory:
         return token
 
     @staticmethod
-    def get_join(db_session_with_containers, *, tenant: Tenant, account: Account) -> TenantAccountJoin:
+    def get_join(db_session_with_containers: Session, *, tenant: Tenant, account: Account) -> TenantAccountJoin:
         tenant_id = tenant.id
         account_id = account.id
         db_session_with_containers.expire_all()
@@ -95,9 +117,9 @@ class WorkspaceMembersIntegrationFactory:
 
 
 class TestMemberCancelInviteApiWithContainers:
-    def test_cancel_success(self, flask_app_with_containers, db_session_with_containers):
+    def test_cancel_success(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = MemberCancelInviteApi()
-        method = unwrap(api.delete)
+        method = unwrap_status_response(api.delete)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(db_session_with_containers, email_prefix="member")
@@ -116,9 +138,9 @@ class TestMemberCancelInviteApiWithContainers:
         assert called_member.id == member.id
         assert called_current_user.id == current_user.id
 
-    def test_cancel_not_found(self, flask_app_with_containers, db_session_with_containers):
+    def test_cancel_not_found(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = MemberCancelInviteApi()
-        method = unwrap(api.delete)
+        method = unwrap_raises(api.delete)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
 
@@ -126,9 +148,11 @@ class TestMemberCancelInviteApiWithContainers:
             with pytest.raises(HTTPException):
                 method(api, current_user, str(uuid4()))
 
-    def test_cancel_cannot_operate_self(self, flask_app_with_containers, db_session_with_containers):
+    def test_cancel_cannot_operate_self(
+        self, flask_app_with_containers: Flask, db_session_with_containers: Session
+    ) -> None:
         api = MemberCancelInviteApi()
-        method = unwrap(api.delete)
+        method = unwrap_status_response(api.delete)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(db_session_with_containers, email_prefix="member")
@@ -146,9 +170,9 @@ class TestMemberCancelInviteApiWithContainers:
         assert status == 400
         assert result["code"] == "cannot-operate-self"
 
-    def test_cancel_no_permission(self, flask_app_with_containers, db_session_with_containers):
+    def test_cancel_no_permission(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = MemberCancelInviteApi()
-        method = unwrap(api.delete)
+        method = unwrap_status_response(api.delete)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(db_session_with_containers, email_prefix="member")
@@ -166,9 +190,11 @@ class TestMemberCancelInviteApiWithContainers:
         assert status == 403
         assert result["code"] == "forbidden"
 
-    def test_cancel_member_not_in_tenant(self, flask_app_with_containers, db_session_with_containers):
+    def test_cancel_member_not_in_tenant(
+        self, flask_app_with_containers: Flask, db_session_with_containers: Session
+    ) -> None:
         api = MemberCancelInviteApi()
-        method = unwrap(api.delete)
+        method = unwrap_status_response(api.delete)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(db_session_with_containers, email_prefix="member")
@@ -188,9 +214,9 @@ class TestMemberCancelInviteApiWithContainers:
 
 
 class TestMemberUpdateRoleApiWithContainers:
-    def test_update_success(self, flask_app_with_containers, db_session_with_containers):
+    def test_update_success(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = MemberUpdateRoleApi()
-        method = unwrap(api.put)
+        method = unwrap_json_or_status_response(api.put)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(
@@ -211,9 +237,11 @@ class TestMemberUpdateRoleApiWithContainers:
             factory.get_join(db_session_with_containers, tenant=tenant, account=member).role == TenantAccountRole.NORMAL
         )
 
-    def test_update_member_not_found(self, flask_app_with_containers, db_session_with_containers):
+    def test_update_member_not_found(
+        self, flask_app_with_containers: Flask, db_session_with_containers: Session
+    ) -> None:
         api = MemberUpdateRoleApi()
-        method = unwrap(api.put)
+        method = unwrap_raises(api.put)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
 
@@ -223,9 +251,9 @@ class TestMemberUpdateRoleApiWithContainers:
 
 
 class TestOwnerTransferApiWithContainers:
-    def test_member_not_in_tenant(self, flask_app_with_containers, db_session_with_containers):
+    def test_member_not_in_tenant(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = OwnerTransfer()
-        method = unwrap(api.post)
+        method = unwrap_raises(api.post)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(db_session_with_containers, email_prefix="member")
@@ -235,9 +263,9 @@ class TestOwnerTransferApiWithContainers:
             with pytest.raises(MemberNotInTenantError):
                 method(api, current_user, member.id)
 
-    def test_member_not_found(self, flask_app_with_containers, db_session_with_containers):
+    def test_member_not_found(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = OwnerTransfer()
-        method = unwrap(api.post)
+        method = unwrap_raises(api.post)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         token = factory.create_owner_transfer_token(current_user)
@@ -246,9 +274,9 @@ class TestOwnerTransferApiWithContainers:
             with pytest.raises(HTTPException):
                 method(api, current_user, str(uuid4()))
 
-    def test_transfer_success(self, flask_app_with_containers, db_session_with_containers):
+    def test_transfer_success(self, flask_app_with_containers: Flask, db_session_with_containers: Session) -> None:
         api = OwnerTransfer()
-        method = unwrap(api.post)
+        method = unwrap_json_response(api.post)
         factory = WorkspaceMembersIntegrationFactory
         tenant, current_user = factory.create_owner_workspace(db_session_with_containers)
         member = factory.create_account(
diff --git a/api/tests/test_containers_integration_tests/pyrefly.toml b/api/tests/test_containers_integration_tests/pyrefly.toml
index 777b690108..e8100ee3c9 100644
--- a/api/tests/test_containers_integration_tests/pyrefly.toml
+++ b/api/tests/test_containers_integration_tests/pyrefly.toml
@@ -1,4 +1,5 @@
 preset = "strict"
+strict-callable-subtyping = true
 project-includes = ["."]
 search-path = ["../.."]
 
@@ -10,7 +11,6 @@ search-path = ["../.."]
 #   rm --force "$tmp_config"
 project-excludes = [
   "commands/test_legacy_model_type_migration.py",
-  "conftest.py",
   "controllers/console/app/test_app_apis.py",
   "controllers/console/app/test_app_import_api.py",
   "controllers/console/app/test_chat_conversation_status_count_api.py",
@@ -28,7 +28,6 @@ project-excludes = [
   "controllers/console/explore/test_conversation.py",
   "controllers/console/test_api_based_extension.py",
   "controllers/console/test_apikey.py",
-  "controllers/console/workspace/test_members.py",
   "controllers/console/workspace/test_tool_provider.py",
   "controllers/console/workspace/test_trigger_providers.py",
   "controllers/console/workspace/test_workspace_wraps.py",
@@ -66,7 +65,6 @@ project-excludes = [
   "services/document_service_status.py",
   "services/enterprise/test_account_deletion_sync.py",
   "services/plugin/test_plugin_parameter_service.py",
-  "services/plugin/test_plugin_permission_service.py",
   "services/plugin/test_plugin_service.py",
   "services/rag_pipeline/test_rag_pipeline_service_db.py",
   "services/recommend_app/test_database_retrieval.py",
@@ -122,7 +120,6 @@ project-excludes = [
   "services/test_saved_message_service.py",
   "services/test_schedule_service.py",
   "services/test_tag_service.py",
-  "services/test_trigger_provider_service.py",
   "services/test_web_conversation_service.py",
   "services/test_webapp_auth_service.py",
   "services/test_webhook_service.py",
@@ -147,7 +144,6 @@ project-excludes = [
   "tasks/test_create_segment_to_index_task.py",
   "tasks/test_dataset_indexing_task.py",
   "tasks/test_deal_dataset_vector_index_task.py",
-  "tasks/test_delete_account_task.py",
   "tasks/test_delete_segment_from_index_task.py",
   "tasks/test_disable_segment_from_index_task.py",
   "tasks/test_disable_segments_from_index_task.py",
@@ -166,7 +162,6 @@ project-excludes = [
   "tasks/test_mail_register_task.py",
   "tasks/test_rag_pipeline_run_tasks.py",
   "tasks/test_remove_app_and_related_data_task.py",
-  "test_container_state_isolation.py",
   "test_opendal_fs_default_root.py",
   "test_workflow_pause_integration.py",
   "trigger/conftest.py",
@@ -179,4 +174,7 @@ project-excludes = [
 ]
 
 [errors]
+redundant-cast = true
 unannotated-return = true
+unnecessary-type-conversion = true
+unused-ignore = true
diff --git a/api/tests/test_containers_integration_tests/services/plugin/test_plugin_permission_service.py b/api/tests/test_containers_integration_tests/services/plugin/test_plugin_permission_service.py
index 49d06986fd..dfa3bc9f01 100644
--- a/api/tests/test_containers_integration_tests/services/plugin/test_plugin_permission_service.py
+++ b/api/tests/test_containers_integration_tests/services/plugin/test_plugin_permission_service.py
@@ -27,7 +27,7 @@ def _count_permissions(session: Session, tenant_id: str) -> int:
 class TestGetPermission:
     """Integration tests for PluginPermissionService.get_permission using testcontainers."""
 
-    def test_returns_permission_when_found(self, db_session_with_containers: Session):
+    def test_returns_permission_when_found(self, db_session_with_containers: Session) -> None:
         tenant_id = _tenant_id()
         permission = TenantPluginPermission(
             tenant_id=tenant_id,
@@ -45,7 +45,7 @@ class TestGetPermission:
         assert result.install_permission == TenantPluginPermission.InstallPermission.ADMINS
         assert result.debug_permission == TenantPluginPermission.DebugPermission.EVERYONE
 
-    def test_returns_none_when_not_found(self, db_session_with_containers: Session):
+    def test_returns_none_when_not_found(self, db_session_with_containers: Session) -> None:
         result = PluginPermissionService.get_permission(_tenant_id())
 
         assert result is None
@@ -54,7 +54,7 @@ class TestGetPermission:
 class TestChangePermission:
     """Integration tests for PluginPermissionService.change_permission using testcontainers."""
 
-    def test_creates_new_permission_when_not_exists(self, db_session_with_containers: Session):
+    def test_creates_new_permission_when_not_exists(self, db_session_with_containers: Session) -> None:
         tenant_id = _tenant_id()
 
         result = PluginPermissionService.change_permission(
@@ -69,7 +69,7 @@ class TestChangePermission:
         assert permission.install_permission == TenantPluginPermission.InstallPermission.EVERYONE
         assert permission.debug_permission == TenantPluginPermission.DebugPermission.EVERYONE
 
-    def test_updates_existing_permission(self, db_session_with_containers: Session):
+    def test_updates_existing_permission(self, db_session_with_containers: Session) -> None:
         tenant_id = _tenant_id()
         existing = TenantPluginPermission(
             tenant_id=tenant_id,
diff --git a/api/tests/test_containers_integration_tests/services/test_trigger_provider_service.py b/api/tests/test_containers_integration_tests/services/test_trigger_provider_service.py
index aff550c909..0aea7151e9 100644
--- a/api/tests/test_containers_integration_tests/services/test_trigger_provider_service.py
+++ b/api/tests/test_containers_integration_tests/services/test_trigger_provider_service.py
@@ -1,3 +1,4 @@
+from collections.abc import Generator
 from unittest.mock import MagicMock, patch
 
 import pytest
@@ -7,17 +8,20 @@ from sqlalchemy.orm import Session
 from constants import HIDDEN_VALUE, UNKNOWN_VALUE
 from core.plugin.entities.plugin_daemon import CredentialType
 from core.trigger.entities.entities import Subscription as TriggerSubscriptionEntity
+from models.account import Account, Tenant
 from models.provider_ids import TriggerProviderID
 from models.trigger import TriggerSubscription
 from services.trigger.trigger_provider_service import TriggerProviderService
 from tests.test_containers_integration_tests.helpers import generate_valid_password
 
+MockExternalServiceDependencies = dict[str, MagicMock]
+
 
 class TestTriggerProviderService:
     """Integration tests for TriggerProviderService using testcontainers."""
 
     @pytest.fixture
-    def mock_external_service_dependencies(self):
+    def mock_external_service_dependencies(self) -> Generator[MockExternalServiceDependencies, None, None]:
         """Mock setup for external service dependencies."""
         with (
             patch("services.trigger.trigger_provider_service.TriggerManager") as mock_trigger_manager,
@@ -48,7 +52,11 @@ class TestTriggerProviderService:
                 "account_feature_service": mock_account_feature_service,
             }
 
-    def _create_test_account_and_tenant(self, db_session_with_containers: Session, mock_external_service_dependencies):
+    def _create_test_account_and_tenant(
+        self,
+        db_session_with_containers: Session,
+        mock_external_service_dependencies: MockExternalServiceDependencies,
+    ) -> tuple[Account, Tenant]:
         """
         Helper method to create a test account and tenant for testing.
 
@@ -80,20 +88,21 @@ class TestTriggerProviderService:
         )
         TenantService.create_owner_tenant_if_not_exist(account, name=fake.company())
         tenant = account.current_tenant
+        assert tenant is not None
 
         return account, tenant
 
     def _create_test_subscription(
         self,
         db_session_with_containers: Session,
-        tenant_id,
-        user_id,
-        provider_id,
-        credential_type,
-        credentials,
-        mock_external_service_dependencies,
+        tenant_id: str,
+        user_id: str,
+        provider_id: TriggerProviderID,
+        credential_type: CredentialType,
+        credentials: dict[str, str],
+        mock_external_service_dependencies: MockExternalServiceDependencies,
         name: str | None = None,
-    ):
+    ) -> TriggerSubscription:
         """
         Helper method to create a test trigger subscription.
 
@@ -133,7 +142,7 @@ class TestTriggerProviderService:
             parameters={"param1": "value1"},
             properties={"prop1": "value1"},
             credentials=dict(credential_encrypter.encrypt(credentials)),
-            credential_type=credential_type.value,
+            credential_type=credential_type,
             credential_expires_at=-1,
             expires_at=-1,
         )
@@ -145,8 +154,8 @@ class TestTriggerProviderService:
         return subscription
 
     def test_rebuild_trigger_subscription_success_with_merged_credentials(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test successful rebuild with credential merging (HIDDEN_VALUE handling).
 
@@ -247,8 +256,8 @@ class TestTriggerProviderService:
         )
 
     def test_rebuild_trigger_subscription_with_all_new_credentials(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test rebuild when all credentials are new (no HIDDEN_VALUE).
 
@@ -307,8 +316,8 @@ class TestTriggerProviderService:
         assert subscribe_credentials["api_secret"] == "completely-new-secret"
 
     def test_rebuild_trigger_subscription_with_all_hidden_values(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test rebuild when all credentials are HIDDEN_VALUE (preserve all existing).
 
@@ -366,8 +375,8 @@ class TestTriggerProviderService:
         assert subscribe_credentials["api_secret"] == original_credentials["api_secret"]
 
     def test_rebuild_trigger_subscription_with_missing_key_uses_unknown_value(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test rebuild when HIDDEN_VALUE is used for a key that doesn't exist in original.
 
@@ -425,8 +434,8 @@ class TestTriggerProviderService:
         assert subscribe_credentials["non_existent_key"] == UNKNOWN_VALUE
 
     def test_rebuild_trigger_subscription_rollback_on_error(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test that transaction is rolled back on error.
 
@@ -478,8 +487,8 @@ class TestTriggerProviderService:
         assert subscription.parameters == original_parameters
 
     def test_rebuild_trigger_subscription_subscription_not_found(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test error when subscription is not found.
 
@@ -504,8 +513,8 @@ class TestTriggerProviderService:
             )
 
     def test_rebuild_trigger_subscription_name_uniqueness_check(
-        self, db_session_with_containers: Session, mock_external_service_dependencies
-    ):
+        self, db_session_with_containers: Session, mock_external_service_dependencies: MockExternalServiceDependencies
+    ) -> None:
         """
         Test that name uniqueness is checked when updating name.
 
diff --git a/api/tests/test_containers_integration_tests/tasks/test_delete_account_task.py b/api/tests/test_containers_integration_tests/tasks/test_delete_account_task.py
index 68737a4ef6..9dfc6325d0 100644
--- a/api/tests/test_containers_integration_tests/tasks/test_delete_account_task.py
+++ b/api/tests/test_containers_integration_tests/tasks/test_delete_account_task.py
@@ -6,9 +6,12 @@ lookup through the real Testcontainers PostgreSQL session factory instead of a
 patched session_factory mock.
 """
 
+from unittest.mock import MagicMock
 from uuid import uuid4
 
 import pytest
+from _pytest.logging import LogCaptureFixture
+from pytest_mock import MockerFixture
 from sqlalchemy.orm import Session
 
 from models.account import Account
@@ -26,14 +29,16 @@ def _create_account(db_session: Session, *, email: str = "user@example.com") ->
 
 
 @pytest.fixture
-def mock_external_dependencies(mocker):
+def mock_external_dependencies(mocker: MockerFixture) -> tuple[MagicMock, MagicMock]:
     billing_service = mocker.patch("tasks.delete_account_task.BillingService")
     mail_task = mocker.patch("tasks.delete_account_task.send_deletion_success_task")
     return billing_service, mail_task
 
 
 def test_billing_enabled_account_exists_calls_billing_and_sends_email(
-    db_session_with_containers: Session, mock_external_dependencies, mocker
+    db_session_with_containers: Session,
+    mock_external_dependencies: tuple[MagicMock, MagicMock],
+    mocker: MockerFixture,
 ) -> None:
     billing_service, mail_task = mock_external_dependencies
     account = _create_account(db_session_with_containers, email="a@b.com")
@@ -46,7 +51,9 @@ def test_billing_enabled_account_exists_calls_billing_and_sends_email(
 
 
 def test_billing_disabled_account_exists_sends_email_only(
-    db_session_with_containers: Session, mock_external_dependencies, mocker
+    db_session_with_containers: Session,
+    mock_external_dependencies: tuple[MagicMock, MagicMock],
+    mocker: MockerFixture,
 ) -> None:
     billing_service, mail_task = mock_external_dependencies
     account = _create_account(db_session_with_containers, email="x@y.com")
@@ -58,7 +65,9 @@ def test_billing_disabled_account_exists_sends_email_only(
     mail_task.delay.assert_called_once_with(account.email)
 
 
-def test_billing_enabled_account_not_found_calls_billing_no_email(mock_external_dependencies, mocker, caplog) -> None:
+def test_billing_enabled_account_not_found_calls_billing_no_email(
+    mock_external_dependencies: tuple[MagicMock, MagicMock], mocker: MockerFixture, caplog: LogCaptureFixture
+) -> None:
     billing_service, mail_task = mock_external_dependencies
     account_id = str(uuid4())
     mocker.patch("tasks.delete_account_task.dify_config.BILLING_ENABLED", True)
@@ -71,7 +80,9 @@ def test_billing_enabled_account_not_found_calls_billing_no_email(mock_external_
 
 
 def test_billing_delete_raises_propagates_and_no_email(
-    db_session_with_containers: Session, mock_external_dependencies, mocker
+    db_session_with_containers: Session,
+    mock_external_dependencies: tuple[MagicMock, MagicMock],
+    mocker: MockerFixture,
 ) -> None:
     billing_service, mail_task = mock_external_dependencies
     account = _create_account(db_session_with_containers, email="err@example.com")
diff --git a/api/tests/test_containers_integration_tests/test_container_state_isolation.py b/api/tests/test_containers_integration_tests/test_container_state_isolation.py
index 702460c5ad..448fca1202 100644
--- a/api/tests/test_containers_integration_tests/test_container_state_isolation.py
+++ b/api/tests/test_containers_integration_tests/test_container_state_isolation.py
@@ -2,6 +2,9 @@ from __future__ import annotations
 
 from uuid import uuid4
 
+from flask import Flask
+from sqlalchemy.orm import Session
+
 from extensions.ext_redis import redis_client
 from models.account import Account
 
@@ -10,8 +13,8 @@ REDIS_KEY = f"container-state-isolation:{uuid4()}"
 
 
 def test_1_container_state_can_be_written(
-    flask_app_with_containers,
-    db_session_with_containers,
+    flask_app_with_containers: Flask,
+    db_session_with_containers: Session,
 ) -> None:
     account = Account(
         name="Container State Isolation",
@@ -30,8 +33,8 @@ def test_1_container_state_can_be_written(
 
 
 def test_2_container_state_is_flushed_between_tests(
-    flask_app_with_containers,
-    db_session_with_containers,
+    flask_app_with_containers: Flask,
+    db_session_with_containers: Session,
 ) -> None:
     assert db_session_with_containers.query(Account).filter_by(email=ACCOUNT_EMAIL).one_or_none() is None