diff --git a/tests/conftest.py b/tests/conftest.py
index d6b0a923..7580094a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2,7 +2,6 @@
 import gc
 import os
 import ssl
-import uuid
 
 import aiomysql
 import pymysql
@@ -247,12 +246,6 @@ def _register_table(table_name):
         loop.run_until_complete(cursor.execute(sql))
 
 
-@pytest.fixture(scope='session')
-def session_id():
-    """Unique session identifier, random string."""
-    return str(uuid.uuid4())
-
-
 @pytest.fixture(autouse=True)
 def ensure_mysql_version(request, mysql_image, mysql_tag):
     mysql_version = request.node.get_closest_marker('mysql_version')