diff --git a/api/tests/integration_tests/vdb/couchbase/test_couchbase.py b/api/tests/integration_tests/vdb/couchbase/test_couchbase.py
index d76c34ba0e..eef1ee4e75 100644
--- a/api/tests/integration_tests/vdb/couchbase/test_couchbase.py
+++ b/api/tests/integration_tests/vdb/couchbase/test_couchbase.py
@@ -4,7 +4,6 @@ import time
 from core.rag.datasource.vdb.couchbase.couchbase_vector import CouchbaseConfig, CouchbaseVector
 from tests.integration_tests.vdb.test_vector_store import (
     AbstractVectorTest,
-    get_example_text,
     setup_mock_redis,
 )
 
diff --git a/api/tests/integration_tests/vdb/matrixone/test_matrixone.py b/api/tests/integration_tests/vdb/matrixone/test_matrixone.py
index c8b19ef3ad..c4056db63e 100644
--- a/api/tests/integration_tests/vdb/matrixone/test_matrixone.py
+++ b/api/tests/integration_tests/vdb/matrixone/test_matrixone.py
@@ -1,7 +1,6 @@
 from core.rag.datasource.vdb.matrixone.matrixone_vector import MatrixoneConfig, MatrixoneVector
 from tests.integration_tests.vdb.test_vector_store import (
     AbstractVectorTest,
-    get_example_text,
     setup_mock_redis,
 )
 
diff --git a/api/tests/integration_tests/vdb/opengauss/test_opengauss.py b/api/tests/integration_tests/vdb/opengauss/test_opengauss.py
index f2013848bf..2a1129493c 100644
--- a/api/tests/integration_tests/vdb/opengauss/test_opengauss.py
+++ b/api/tests/integration_tests/vdb/opengauss/test_opengauss.py
@@ -5,7 +5,6 @@ import psycopg2  # type: ignore
 from core.rag.datasource.vdb.opengauss.opengauss import OpenGauss, OpenGaussConfig
 from tests.integration_tests.vdb.test_vector_store import (
     AbstractVectorTest,
-    get_example_text,
     setup_mock_redis,
 )
 
diff --git a/api/tests/integration_tests/vdb/pyvastbase/test_vastbase_vector.py b/api/tests/integration_tests/vdb/pyvastbase/test_vastbase_vector.py
index 3d7873442b..02931fef5a 100644
--- a/api/tests/integration_tests/vdb/pyvastbase/test_vastbase_vector.py
+++ b/api/tests/integration_tests/vdb/pyvastbase/test_vastbase_vector.py
@@ -1,7 +1,6 @@
 from core.rag.datasource.vdb.pyvastbase.vastbase_vector import VastbaseVector, VastbaseVectorConfig
 from tests.integration_tests.vdb.test_vector_store import (
     AbstractVectorTest,
-    get_example_text,
     setup_mock_redis,
 )
 
diff --git a/api/tests/integration_tests/workflow/nodes/test_llm.py b/api/tests/integration_tests/workflow/nodes/test_llm.py
index 389d1071f3..638323f850 100644
--- a/api/tests/integration_tests/workflow/nodes/test_llm.py
+++ b/api/tests/integration_tests/workflow/nodes/test_llm.py
@@ -1,5 +1,4 @@
 import json
-import os
 import time
 import uuid
 from collections.abc import Generator
@@ -113,8 +112,6 @@ def test_execute_llm(flask_req_ctx):
         },
     )
 
-    credentials = {"openai_api_key": os.environ.get("OPENAI_API_KEY")}
-
     # Create a proper LLM result with real entities
     mock_usage = LLMUsage(
         prompt_tokens=30,
diff --git a/api/tests/unit_tests/factories/test_variable_factory.py b/api/tests/unit_tests/factories/test_variable_factory.py
index 481fbdc91a..edd4c5e93e 100644
--- a/api/tests/unit_tests/factories/test_variable_factory.py
+++ b/api/tests/unit_tests/factories/test_variable_factory.py
@@ -14,9 +14,7 @@ from core.variables import (
     ArrayStringVariable,
     FloatVariable,
     IntegerVariable,
-    ObjectSegment,
     SecretVariable,
-    SegmentType,
     StringVariable,
 )
 from core.variables.exc import VariableError
@@ -418,8 +416,6 @@ def test_build_segment_file_array_with_different_file_types():
 
 @st.composite
 def _generate_file(draw) -> File:
-    file_id = draw(st.text(min_size=1, max_size=10))
-    tenant_id = draw(st.text(min_size=1, max_size=10))
     file_type, mime_type, extension = draw(
         st.sampled_from(
             [
diff --git a/api/tests/unit_tests/services/test_dataset_service_update_dataset.py b/api/tests/unit_tests/services/test_dataset_service_update_dataset.py
index cdbb439c85..87b46f213b 100644
--- a/api/tests/unit_tests/services/test_dataset_service_update_dataset.py
+++ b/api/tests/unit_tests/services/test_dataset_service_update_dataset.py
@@ -10,7 +10,6 @@ from core.model_runtime.entities.model_entities import ModelType
 from models.dataset import Dataset, ExternalKnowledgeBindings
 from services.dataset_service import DatasetService
 from services.errors.account import NoPermissionError
-from tests.unit_tests.conftest import redis_mock
 
 
 class DatasetUpdateTestDataFactory: