diff --git a/tests/test_dimension_mismatch.py b/tests/test_dimension_mismatch.py
index ada7f14e..b494c5ab 100644
--- a/tests/test_dimension_mismatch.py
+++ b/tests/test_dimension_mismatch.py
@@ -170,7 +170,6 @@ class TestQdrantDimensionMismatch:
 class TestPostgresDimensionMismatch:
     """Test suite for PostgreSQL dimension mismatch handling."""
 
-    @pytest.mark.asyncio
     async def test_postgres_dimension_mismatch_skip_migration_metadata(self):
         """
         Test that PostgreSQL skips migration when dimensions don't match (via metadata).
@@ -220,7 +219,6 @@ class TestPostgresDimensionMismatch:
             len(insert_calls) == 0
         ), "Migration should be skipped due to dimension mismatch"
 
-    @pytest.mark.asyncio
     async def test_postgres_dimension_mismatch_skip_migration_sampling(self):
         """
         Test that PostgreSQL skips migration when dimensions don't match (via sampling).
@@ -277,7 +275,6 @@ class TestPostgresDimensionMismatch:
         ]
         assert len(insert_calls) == 0, "Migration should be skipped"
 
-    @pytest.mark.asyncio
     async def test_postgres_dimension_match_proceed_migration(self):
         """
         Test that PostgreSQL proceeds with migration when dimensions match.
diff --git a/tests/test_no_model_suffix_safety.py b/tests/test_no_model_suffix_safety.py
index 8ae5f54e..63301379 100644
--- a/tests/test_no_model_suffix_safety.py
+++ b/tests/test_no_model_suffix_safety.py
@@ -10,7 +10,6 @@ On second startup, Case 1 logic would delete the only table/collection thinking
 it's "legacy", causing all subsequent operations to fail.
 """
 
-import pytest
 from unittest.mock import MagicMock, AsyncMock, patch
 
 from lightrag.kg.qdrant_impl import QdrantVectorDBStorage
@@ -75,7 +74,6 @@ class TestNoModelSuffixSafety:
         # because we detected same name
         assert client.collection_exists.call_count >= 1
 
-    @pytest.mark.asyncio
     async def test_postgres_no_suffix_second_startup(self):
         """
         Test PostgreSQL doesn't delete table on second startup when no model_name.
@@ -176,7 +174,6 @@ class TestNoModelSuffixSafety:
             collection_name=legacy_collection
         )
 
-    @pytest.mark.asyncio
     async def test_postgres_with_suffix_case1_still_works(self):
         """
         Test that Case 1 cleanup still works when there IS a suffix.
diff --git a/tests/test_postgres_migration.py b/tests/test_postgres_migration.py
index 7509562f..020326f5 100644
--- a/tests/test_postgres_migration.py
+++ b/tests/test_postgres_migration.py
@@ -70,7 +70,6 @@ def mock_embedding_func():
     return func
 
 
-@pytest.mark.asyncio
 async def test_postgres_table_naming(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -96,7 +95,6 @@ async def test_postgres_table_naming(
     assert storage.legacy_table_name == "LIGHTRAG_VDB_CHUNKS"
 
 
-@pytest.mark.asyncio
 async def test_postgres_migration_trigger(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -181,7 +179,6 @@ async def test_postgres_migration_trigger(
         assert len(migration_executed) > 0, "Migration should have been executed"
 
 
-@pytest.mark.asyncio
 async def test_postgres_no_migration_needed(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -214,7 +211,6 @@ async def test_postgres_no_migration_needed(
         mock_create.assert_not_called()
 
 
-@pytest.mark.asyncio
 async def test_scenario_1_new_workspace_creation(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -267,7 +263,6 @@ async def test_scenario_1_new_workspace_creation(
         )  # table_name is second positional arg
 
 
-@pytest.mark.asyncio
 async def test_scenario_2_legacy_upgrade_migration(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -385,7 +380,6 @@ async def test_scenario_2_legacy_upgrade_migration(
         mock_create.assert_called_once()
 
 
-@pytest.mark.asyncio
 async def test_scenario_3_multi_model_coexistence(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -459,7 +453,6 @@ async def test_scenario_3_multi_model_coexistence(
         assert storage_b.table_name in table_names
 
 
-@pytest.mark.asyncio
 async def test_case1_empty_legacy_auto_cleanup(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -524,7 +517,6 @@ async def test_case1_empty_legacy_auto_cleanup(
         )
 
 
-@pytest.mark.asyncio
 async def test_case1_nonempty_legacy_warning(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
@@ -587,7 +579,6 @@ async def test_case1_nonempty_legacy_warning(
         )
 
 
-@pytest.mark.asyncio
 async def test_case1_sequential_workspace_migration(
     mock_client_manager, mock_pg_db, mock_embedding_func
 ):
diff --git a/tests/test_qdrant_migration.py b/tests/test_qdrant_migration.py
index 430dad2f..d0f5a75c 100644
--- a/tests/test_qdrant_migration.py
+++ b/tests/test_qdrant_migration.py
@@ -41,7 +41,6 @@ def mock_embedding_func():
     return func
 
 
-@pytest.mark.asyncio
 async def test_qdrant_collection_naming(mock_qdrant_client, mock_embedding_func):
     """Test if collection name is correctly generated with model suffix"""
     config = {
@@ -62,7 +61,6 @@ async def test_qdrant_collection_naming(mock_qdrant_client, mock_embedding_func)
     assert storage.final_namespace == f"lightrag_vdb_chunks_{expected_suffix}"
 
 
-@pytest.mark.asyncio
 async def test_qdrant_migration_trigger(mock_qdrant_client, mock_embedding_func):
     """Test if migration logic is triggered correctly"""
     config = {
@@ -141,7 +139,6 @@ async def test_qdrant_migration_trigger(mock_qdrant_client, mock_embedding_func)
     mock_qdrant_client.create_payload_index.assert_called()
 
 
-@pytest.mark.asyncio
 async def test_qdrant_no_migration_needed(mock_qdrant_client, mock_embedding_func):
     """Test scenario where new collection already exists (Case 1 in setup_collection)
 
@@ -188,7 +185,6 @@ async def test_qdrant_no_migration_needed(mock_qdrant_client, mock_embedding_fun
 # ============================================================================
 
 
-@pytest.mark.asyncio
 async def test_scenario_1_new_workspace_creation(
     mock_qdrant_client, mock_embedding_func
 ):
@@ -243,7 +239,6 @@ async def test_scenario_1_new_workspace_creation(
     )
 
 
-@pytest.mark.asyncio
 async def test_scenario_2_legacy_upgrade_migration(
     mock_qdrant_client, mock_embedding_func
 ):
@@ -353,7 +348,6 @@ async def test_scenario_2_legacy_upgrade_migration(
     )
 
 
-@pytest.mark.asyncio
 async def test_scenario_3_multi_model_coexistence(mock_qdrant_client):
     """
     场景3：多模型并存
@@ -418,7 +412,6 @@ async def test_scenario_3_multi_model_coexistence(mock_qdrant_client):
     print("   - Collections are independent")
 
 
-@pytest.mark.asyncio
 async def test_case1_empty_legacy_auto_cleanup(mock_qdrant_client, mock_embedding_func):
     """
     Case 1a: 新旧collection都存在，且旧库为空
@@ -485,7 +478,6 @@ async def test_case1_empty_legacy_auto_cleanup(mock_qdrant_client, mock_embeddin
     )
 
 
-@pytest.mark.asyncio
 async def test_case1_nonempty_legacy_warning(mock_qdrant_client, mock_embedding_func):
     """
     Case 1b: 新旧collection都存在，且旧库有数据
diff --git a/tests/test_unified_lock_safety.py b/tests/test_unified_lock_safety.py
index 39f3fb38..1d83190a 100644
--- a/tests/test_unified_lock_safety.py
+++ b/tests/test_unified_lock_safety.py
@@ -16,8 +16,10 @@ Critical Bug 2: In __aexit__, when async_lock.release() fails, the error
 recovery logic would attempt to release it again, causing double-release issues.
 """
 
-import pytest
 from unittest.mock import MagicMock, AsyncMock
+
+import pytest
+
 from lightrag.kg.shared_storage import (
     UnifiedLock,
     get_internal_lock,
@@ -65,7 +67,7 @@ class TestUnifiedLockSafety:
         ):
             get_data_init_lock()
 
-    @pytest.mark.asyncio
+    @pytest.mark.offline
     async def test_aexit_no_double_release_on_async_lock_failure(self):
         """
         Test that __aexit__ doesn't attempt to release async_lock twice when it fails.
diff --git a/tests/test_workspace_isolation.py b/tests/test_workspace_isolation.py
index 68f7f8ec..0aac3186 100644
--- a/tests/test_workspace_isolation.py
+++ b/tests/test_workspace_isolation.py
@@ -149,7 +149,6 @@ def _assert_no_timeline_overlap(timeline: List[Tuple[str, str]]) -> None:
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_pipeline_status_isolation():
     """
     Test that pipeline status is isolated between different workspaces.
@@ -204,7 +203,6 @@ async def test_pipeline_status_isolation():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_lock_mechanism(stress_test_mode, parallel_workers):
     """
     Test that the new keyed lock mechanism works correctly without deadlocks.
@@ -274,7 +272,6 @@ async def test_lock_mechanism(stress_test_mode, parallel_workers):
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_backward_compatibility():
     """
     Test that legacy code without workspace parameter still works correctly.
@@ -348,7 +345,6 @@ async def test_backward_compatibility():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_multi_workspace_concurrency():
     """
     Test that multiple workspaces can operate concurrently without interference.
@@ -432,7 +428,6 @@ async def test_multi_workspace_concurrency():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_namespace_lock_reentrance():
     """
     Test that NamespaceLock prevents re-entrance in the same coroutine
@@ -506,7 +501,6 @@ async def test_namespace_lock_reentrance():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_different_namespace_lock_isolation():
     """
     Test that locks for different namespaces (same workspace) are independent.
@@ -546,7 +540,6 @@ async def test_different_namespace_lock_isolation():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_error_handling():
     """
     Test error handling for invalid workspace configurations.
@@ -597,7 +590,6 @@ async def test_error_handling():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_update_flags_workspace_isolation():
     """
     Test that update flags are properly isolated between workspaces.
@@ -727,7 +719,6 @@ async def test_update_flags_workspace_isolation():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_empty_workspace_standardization():
     """
     Test that empty workspace is properly standardized to "" instead of "_".
@@ -781,7 +772,6 @@ async def test_empty_workspace_standardization():
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_json_kv_storage_workspace_isolation(keep_test_artifacts):
     """
     Integration test: Verify JsonKVStorage properly isolates data between workspaces.
@@ -961,7 +951,6 @@ async def test_json_kv_storage_workspace_isolation(keep_test_artifacts):
 
 
 @pytest.mark.offline
-@pytest.mark.asyncio
 async def test_lightrag_end_to_end_workspace_isolation(keep_test_artifacts):
     """
     End-to-end test: Create two LightRAG instances with different workspaces,
diff --git a/tests/test_workspace_migration_isolation.py b/tests/test_workspace_migration_isolation.py
index b727e7af..799c1fa4 100644
--- a/tests/test_workspace_migration_isolation.py
+++ b/tests/test_workspace_migration_isolation.py
@@ -17,7 +17,6 @@ from lightrag.kg.postgres_impl import PGVectorStorage
 class TestWorkspaceMigrationIsolation:
     """Test suite for workspace-scoped migration in PostgreSQL."""
 
-    @pytest.mark.asyncio
     async def test_migration_filters_by_workspace(self):
         """
         Test that migration only copies data from the specified workspace.
@@ -141,7 +140,6 @@ class TestWorkspaceMigrationIsolation:
             new_table_record_count["count"] == 2
         ), "Should have migrated 2 records from workspace_a"
 
-    @pytest.mark.asyncio
     async def test_migration_without_workspace_raises_error(self):
         """
         Test that migration without workspace parameter raises ValueError.
@@ -162,7 +160,6 @@ class TestWorkspaceMigrationIsolation:
                 base_table="lightrag_doc_chunks",
             )
 
-    @pytest.mark.asyncio
     async def test_no_cross_workspace_contamination(self):
         """
         Test that workspace B's migration doesn't include workspace A's data.