diff --git a/app/main.py b/app/main.py
index 03448a2..331db96 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,15 +1,16 @@
 from contextlib import asynccontextmanager
+from typing import Generator
 
 from fastapi import FastAPI
 
 from app.api import main_router
-from app.core import create_admin, settings
+from app.core import create_admin, get_async_session, settings
 
 
 @asynccontextmanager
-async def lifespan(app: FastAPI):
-    await create_admin()
-    yield
+async def lifespan(app: FastAPI, async_generator: Generator = get_async_session):
+    yield await create_admin(async_generator)
+
 
 app = FastAPI(lifespan=lifespan,
               title=settings.app_title,
diff --git a/tests/unit_tests/test_user.py b/tests/unit_tests/test_user.py
index dc9e254..9a19a4e 100644
--- a/tests/unit_tests/test_user.py
+++ b/tests/unit_tests/test_user.py
@@ -1,24 +1,33 @@
 import pytest
 
 from app.core.user import create_admin, create_user
+from app.main import lifespan
 from tests.conftest import User, override_get_async_session, settings
 
 
+def check_user(user: User, is_superuser: bool = True) -> None:
+    assert user.email == settings.admin_email
+    assert user.hashed_password
+    assert user.is_superuser == is_superuser
+
+
 @pytest.mark.asyncio
 @pytest.mark.parametrize('is_superuser', (True, False))
 async def test_create_user(is_superuser) -> None:
-    user: User = await create_user(override_get_async_session,
+    user = await create_user(override_get_async_session,
                                    settings.admin_email,
                                    settings.admin_password,
                                    is_superuser=is_superuser)
-    assert user.email == settings.admin_email
-    assert user.hashed_password
-    assert user.is_superuser == is_superuser
+    check_user(user, is_superuser)
 
 
 @pytest.mark.asyncio
 async def test_create_admin() -> None:
-    user: User = await create_admin(override_get_async_session)
-    assert user.email == settings.admin_email
-    assert user.hashed_password
-    assert user.is_superuser
+    user = await create_admin(override_get_async_session)
+    check_user(user)
+
+
+@pytest.mark.asyncio
+async def test_lifespan() -> None:
+    async with lifespan('', override_get_async_session) as user:
+        check_user(user)