diff --git a/backend/app/api/routes/login.py b/backend/app/api/routes/login.py
index 4b741ce880..30831928f2 100644
--- a/backend/app/api/routes/login.py
+++ b/backend/app/api/routes/login.py
@@ -9,7 +9,7 @@
 from app.core import security
 from app.core.config import settings
 from app.core.security import get_password_hash
-from app.models import Message, NewPassword, Token, UserOut
+from app.models import Message, NewPassword, Token, User, UserOut
 from app.utils import (
     generate_password_reset_token,
     send_reset_password_email,
@@ -73,10 +73,10 @@ def reset_password(session: SessionDep, body: NewPassword) -> Message:
     """
     Reset password
     """
-    email = verify_password_reset_token(token=body.token)
-    if not email:
+    user_id = verify_password_reset_token(token=body.token)
+    if not user_id:
         raise HTTPException(status_code=400, detail="Invalid token")
-    user = crud.get_user_by_email(session=session, email=email)
+    user = session.get(User, int(user_id))
     if not user:
         raise HTTPException(
             status_code=404,
diff --git a/backend/app/api/routes/users.py b/backend/app/api/routes/users.py
index 1c76293aed..0850c929f6 100644
--- a/backend/app/api/routes/users.py
+++ b/backend/app/api/routes/users.py
@@ -144,8 +144,7 @@ def read_user_by_id(
         return user
     if not current_user.is_superuser:
         raise HTTPException(
-            # TODO: Review status code
-            status_code=400,
+            status_code=403,
             detail="The user doesn't have enough privileges",
         )
     return user
@@ -194,5 +193,5 @@ def delete_user(
         return Message(message="User deleted successfully")
     elif user == current_user and current_user.is_superuser:
         raise HTTPException(
-            status_code=400, detail="Super users are not allowed to delete themselves"
+            status_code=403, detail="Super users are not allowed to delete themselves"
         )
diff --git a/backend/app/backend_pre_start.py b/backend/app/backend_pre_start.py
index 1693d257d8..c2f8e29ae1 100644
--- a/backend/app/backend_pre_start.py
+++ b/backend/app/backend_pre_start.py
@@ -1,5 +1,6 @@
 import logging
 
+from sqlalchemy import Engine
 from sqlmodel import Session, select
 from tenacity import after_log, before_log, retry, stop_after_attempt, wait_fixed
 
@@ -18,9 +19,9 @@
     before=before_log(logger, logging.INFO),
     after=after_log(logger, logging.WARN),
 )
-def init() -> None:
+def init(db_engine: Engine) -> None:
     try:
-        with Session(engine) as session:
+        with Session(db_engine) as session:
             # Try to create session to check if DB is awake
             session.exec(select(1))
     except Exception as e:
@@ -30,7 +31,7 @@ def init() -> None:
 
 def main() -> None:
     logger.info("Initializing service")
-    init()
+    init(engine)
     logger.info("Service finished initializing")
 
 
diff --git a/backend/app/celeryworker_pre_start.py b/backend/app/celeryworker_pre_start.py
index a9336023b3..0ce6045635 100644
--- a/backend/app/celeryworker_pre_start.py
+++ b/backend/app/celeryworker_pre_start.py
@@ -1,5 +1,6 @@
 import logging
 
+from sqlalchemy import Engine
 from sqlmodel import Session, select
 from tenacity import after_log, before_log, retry, stop_after_attempt, wait_fixed
 
@@ -18,10 +19,10 @@
     before=before_log(logger, logging.INFO),
     after=after_log(logger, logging.WARN),
 )
-def init() -> None:
+def init(db_engine: Engine) -> None:
     try:
         # Try to create session to check if DB is awake
-        with Session(engine) as session:
+        with Session(db_engine) as session:
             session.exec(select(1))
     except Exception as e:
         logger.error(e)
@@ -30,7 +31,7 @@ def init() -> None:
 
 def main() -> None:
     logger.info("Initializing service")
-    init()
+    init(engine)
     logger.info("Service finished initializing")
 
 
diff --git a/backend/app/crud.py b/backend/app/crud.py
index ab665cb090..7488700a91 100644
--- a/backend/app/crud.py
+++ b/backend/app/crud.py
@@ -47,6 +47,7 @@ def authenticate(*, session: Session, email: str, password: str) -> User | None:
         return None
     return db_user
 
+
 def create_item(*, session: Session, item_in: ItemCreate, owner_id: int) -> Item:
     db_item = Item.model_validate(item_in, update={"owner_id": owner_id})
     session.add(db_item)
diff --git a/backend/app/tests/api/api_v1/test_items.py b/backend/app/tests/api/api_v1/test_items.py
index 0c92dd9c01..20eca1e575 100644
--- a/backend/app/tests/api/api_v1/test_items.py
+++ b/backend/app/tests/api/api_v1/test_items.py
@@ -36,3 +36,127 @@ def test_read_item(
     assert content["description"] == item.description
     assert content["id"] == item.id
     assert content["owner_id"] == item.owner_id
+
+
+def test_read_item_not_found(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    response = client.get(
+        f"{settings.API_V1_STR}/items/999",
+        headers=superuser_token_headers,
+    )
+    assert response.status_code == 404
+    content = response.json()
+    assert content["detail"] == "Item not found"
+
+
+def test_read_item_not_enough_permissions(
+    client: TestClient, normal_user_token_headers: dict, db: Session
+) -> None:
+    item = create_random_item(db)
+    response = client.get(
+        f"{settings.API_V1_STR}/items/{item.id}",
+        headers=normal_user_token_headers,
+    )
+    assert response.status_code == 400
+    content = response.json()
+    assert content["detail"] == "Not enough permissions"
+
+
+def test_read_items(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    create_random_item(db)
+    create_random_item(db)
+    response = client.get(
+        f"{settings.API_V1_STR}/items/",
+        headers=superuser_token_headers,
+    )
+    assert response.status_code == 200
+    content = response.json()
+    assert len(content["data"]) >= 2
+
+
+def test_update_item(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    item = create_random_item(db)
+    data = {"title": "Updated title", "description": "Updated description"}
+    response = client.put(
+        f"{settings.API_V1_STR}/items/{item.id}",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert response.status_code == 200
+    content = response.json()
+    assert content["title"] == data["title"]
+    assert content["description"] == data["description"]
+    assert content["id"] == item.id
+    assert content["owner_id"] == item.owner_id
+
+
+def test_update_item_not_found(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    data = {"title": "Updated title", "description": "Updated description"}
+    response = client.put(
+        f"{settings.API_V1_STR}/items/999",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert response.status_code == 404
+    content = response.json()
+    assert content["detail"] == "Item not found"
+
+
+def test_update_item_not_enough_permissions(
+    client: TestClient, normal_user_token_headers: dict, db: Session
+) -> None:
+    item = create_random_item(db)
+    data = {"title": "Updated title", "description": "Updated description"}
+    response = client.put(
+        f"{settings.API_V1_STR}/items/{item.id}",
+        headers=normal_user_token_headers,
+        json=data,
+    )
+    assert response.status_code == 400
+    content = response.json()
+    assert content["detail"] == "Not enough permissions"
+
+
+def test_delete_item(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    item = create_random_item(db)
+    response = client.delete(
+        f"{settings.API_V1_STR}/items/{item.id}",
+        headers=superuser_token_headers,
+    )
+    assert response.status_code == 200
+    content = response.json()
+    assert content["message"] == "Item deleted successfully"
+
+
+def test_delete_item_not_found(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    response = client.delete(
+        f"{settings.API_V1_STR}/items/999",
+        headers=superuser_token_headers,
+    )
+    assert response.status_code == 404
+    content = response.json()
+    assert content["detail"] == "Item not found"
+
+
+def test_delete_item_not_enough_permissions(
+    client: TestClient, normal_user_token_headers: dict, db: Session
+) -> None:
+    item = create_random_item(db)
+    response = client.delete(
+        f"{settings.API_V1_STR}/items/{item.id}",
+        headers=normal_user_token_headers,
+    )
+    assert response.status_code == 400
+    content = response.json()
+    assert content["detail"] == "Not enough permissions"
diff --git a/backend/app/tests/api/api_v1/test_login.py b/backend/app/tests/api/api_v1/test_login.py
index a8b33223b6..5415fd83df 100644
--- a/backend/app/tests/api/api_v1/test_login.py
+++ b/backend/app/tests/api/api_v1/test_login.py
@@ -15,6 +15,15 @@ def test_get_access_token(client: TestClient) -> None:
     assert tokens["access_token"]
 
 
+def test_get_access_token_incorrect_password(client: TestClient) -> None:
+    login_data = {
+        "username": settings.FIRST_SUPERUSER,
+        "password": "incorrect",
+    }
+    r = client.post(f"{settings.API_V1_STR}/login/access-token", data=login_data)
+    assert r.status_code == 400
+
+
 def test_use_access_token(
     client: TestClient, superuser_token_headers: dict[str, str]
 ) -> None:
@@ -25,3 +34,64 @@ def test_use_access_token(
     result = r.json()
     assert r.status_code == 200
     assert "email" in result
+
+
+def test_recovery_password(
+    client: TestClient, normal_user_token_headers: dict[str, str], mocker
+) -> None:
+    mocker.patch("app.utils.send_reset_password_email", return_value=None)
+    mocker.patch("app.utils.send_email", return_value=None)
+    email = "test@example.com"
+    r = client.post(
+        f"{settings.API_V1_STR}/password-recovery/{email}",
+        headers=normal_user_token_headers,
+    )
+    assert r.status_code == 200
+    assert r.json() == {"message": "Password recovery email sent"}
+
+
+def test_recovery_password_user_not_exits(
+    client: TestClient, normal_user_token_headers: dict[str, str]
+) -> None:
+    email = "jVgQr@example.com"
+    r = client.post(
+        f"{settings.API_V1_STR}/password-recovery/{email}",
+        headers=normal_user_token_headers,
+    )
+    assert r.status_code == 404
+
+
+def test_reset_password(
+    client: TestClient, superuser_token_headers: dict[str, str]
+) -> None:
+    login_data = {
+        "username": settings.FIRST_SUPERUSER,
+        "password": settings.FIRST_SUPERUSER_PASSWORD,
+    }
+    r = client.post(f"{settings.API_V1_STR}/login/access-token", data=login_data)
+    token = r.json().get("access_token")
+
+    data = {"new_password": "changethis", "token": token}
+    r = client.post(
+        f"{settings.API_V1_STR}/reset-password/",
+        headers=superuser_token_headers,
+        json=data
+    )
+    assert r.status_code == 200
+    assert r.json() == {"message": "Password updated successfully"}
+
+
+def test_reset_password_invalid_token(
+    client: TestClient, superuser_token_headers: dict[str, str]
+) -> None:
+    data = {"new_password": "changethis", "token": "invalid"}
+    r = client.post(
+        f"{settings.API_V1_STR}/reset-password/",
+        headers=superuser_token_headers,
+        json=data
+    )
+    response = r.json()
+
+    assert "detail" in response
+    assert r.status_code == 400
+    assert response["detail"] == "Invalid token"
diff --git a/backend/app/tests/api/api_v1/test_users.py b/backend/app/tests/api/api_v1/test_users.py
index 17d5465798..69b66579a0 100644
--- a/backend/app/tests/api/api_v1/test_users.py
+++ b/backend/app/tests/api/api_v1/test_users.py
@@ -30,8 +30,10 @@ def test_get_users_normal_user_me(
 
 
 def test_create_user_new_email(
-    client: TestClient, superuser_token_headers: dict, db: Session
+    client: TestClient, superuser_token_headers: dict, db: Session, mocker
 ) -> None:
+    mocker.patch("app.utils.send_new_account_email")
+    mocker.patch("app.core.config.settings.EMAILS_ENABLED", True)
     username = random_email()
     password = random_lower_string()
     data = {"email": username, "password": password}
@@ -66,6 +68,46 @@ def test_get_existing_user(
     assert existing_user.email == api_user["email"]
 
 
+def test_get_existing_user_current_user(
+    client: TestClient, db: Session
+) -> None:
+    username = random_email()
+    password = random_lower_string()
+    user_in = UserCreate(email=username, password=password)
+    user = crud.create_user(session=db, user_create=user_in)
+    user_id = user.id
+
+    login_data = {
+        "username": username,
+        "password": password,
+    }
+    r = client.post(f"{settings.API_V1_STR}/login/access-token", data=login_data)
+    tokens = r.json()
+    a_token = tokens["access_token"]
+    headers = {"Authorization": f"Bearer {a_token}"}
+
+    r = client.get(
+        f"{settings.API_V1_STR}/users/{user_id}",
+        headers=headers,
+    )
+    assert 200 <= r.status_code < 300
+    api_user = r.json()
+    existing_user = crud.get_user_by_email(session=db, email=username)
+    assert existing_user
+    assert existing_user.email == api_user["email"]
+
+
+def test_get_existing_user_permissions_error(
+    client: TestClient, normal_user_token_headers: dict[str, str], db: Session
+) -> None:
+    r = client.get(
+        f"{settings.API_V1_STR}/users/999999",
+        headers=normal_user_token_headers,
+    )
+    assert r.status_code == 403
+    assert r.json() == {"detail": "The user doesn't have enough privileges"}
+
+
 def test_create_user_existing_username(
     client: TestClient, superuser_token_headers: dict, db: Session
 ) -> None:
@@ -119,3 +161,223 @@ def test_retrieve_users(
     assert "count" in all_users
     for item in all_users["data"]:
         assert "email" in item
+
+
+def test_update_user_me(
+    client: TestClient, normal_user_token_headers: dict[str, str], db: Session
+) -> None:
+    full_name = "Updated Name"
+    email = "updated email"
+    data = {"full_name": full_name, "email": email}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/me",
+        headers=normal_user_token_headers,
+        json=data,
+    )
+    assert r.status_code == 200
+    updated_user = r.json()
+    assert updated_user["email"] == email
+    assert updated_user["full_name"] == full_name
+
+
+def test_update_password_me(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    new_password = random_lower_string()
+    data = {"current_password": settings.FIRST_SUPERUSER_PASSWORD, "new_password": new_password}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/me/password",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert r.status_code == 200
+    updated_user = r.json()
+    assert updated_user["message"] == "Password updated successfully"
+
+    # Revert to the old password to keep consistency in test
+    old_data = {"current_password": new_password, "new_password": settings.FIRST_SUPERUSER_PASSWORD}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/me/password",
+        headers=superuser_token_headers,
+        json=old_data,
+    )
+    assert r.status_code == 200
+
+
+def test_update_password_me_incorrect_password(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    new_password = random_lower_string()
+    data = {"current_password": new_password, "new_password": new_password}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/me/password",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert r.status_code == 400
+    updated_user = r.json()
+    assert updated_user["detail"] == "Incorrect password"
+
+
+def test_update_password_me_same_password_error(
+    client: TestClient, superuser_token_headers: dict, db: Session
+) -> None:
+    data = {"current_password": settings.FIRST_SUPERUSER_PASSWORD, "new_password": settings.FIRST_SUPERUSER_PASSWORD}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/me/password",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert r.status_code == 400
+    updated_user = r.json()
+    assert updated_user["detail"] == "New password cannot be the same as the current one"
+
+
+def test_create_user_open(
+    client: TestClient, mocker
+) -> None:
+    mocker.patch("app.core.config.settings.USERS_OPEN_REGISTRATION", True)
+    username = random_email()
+    password = random_lower_string()
+    full_name = random_lower_string()
+    data = {"email": username, "password": password, "full_name": full_name}
+    r = client.post(
+        f"{settings.API_V1_STR}/users/open",
+        json=data,
+    )
+    assert r.status_code == 200
+    created_user = r.json()
+    assert created_user["email"] == username
+    assert created_user["full_name"] == full_name
+
+
+def test_create_user_open_forbidden_error(
+    client: TestClient, mocker
+) -> None:
+    mocker.patch("app.core.config.settings.USERS_OPEN_REGISTRATION", False)
+    username = random_email()
+    password = random_lower_string()
+    full_name = random_lower_string()
+    data = {"email": username, "password": password, "full_name": full_name}
+    r = client.post(
+        f"{settings.API_V1_STR}/users/open",
+        json=data,
+    )
+    assert r.status_code == 403
+    assert r.json()["detail"] == "Open user registration is forbidden on this server"
+
+
+def test_create_user_open_already_exists_error(
+    client: TestClient, mocker
+) -> None:
+    mocker.patch("app.core.config.settings.USERS_OPEN_REGISTRATION", True)
+    password = random_lower_string()
+    full_name = random_lower_string()
+    data = {"email": settings.FIRST_SUPERUSER, "password": password, "full_name": full_name}
+    r = client.post(
+        f"{settings.API_V1_STR}/users/open",
+        json=data,
+    )
+    assert r.status_code == 400
+    assert r.json()["detail"] == "The user with this username already exists in the system"
+
+
+def test_update_user(
+    client: TestClient, superuser_token_headers: dict[str, str], db: Session
+) -> None:
+    username = random_email()
+    password = random_lower_string()
+    user_in = UserCreate(email=username, password=password)
+    user = crud.create_user(session=db, user_create=user_in)
+
+    data = {"full_name": "Updated_full_name"}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/{user.id}",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert r.status_code == 200
+    updated_user = r.json()
+    assert updated_user["full_name"] == "Updated_full_name"
+
+
+def test_update_user_not_exists(
+    client: TestClient, superuser_token_headers: dict[str, str], db: Session
+) -> None:
+    data = {"full_name": "Updated_full_name"}
+    r = client.patch(
+        f"{settings.API_V1_STR}/users/99999999",
+        headers=superuser_token_headers,
+        json=data,
+    )
+    assert r.status_code == 404
+    assert r.json()["detail"] == "The user with this username does not exist in the system"
+
+
+def test_delete_user_super_user(
+    client: TestClient, superuser_token_headers: dict[str, str], db: Session
+) -> None:
+    username = random_email()
+    password = random_lower_string()
+    user_in = UserCreate(email=username, password=password)
+    user = crud.create_user(session=db, user_create=user_in)
+    user_id = user.id
+    r = client.delete(
+        f"{settings.API_V1_STR}/users/{user_id}",
+        headers=superuser_token_headers,
+    )
+    assert r.status_code == 200
+    deleted_user = r.json()
+    assert deleted_user["message"] == "User deleted successfully"
+
+
+def test_delete_user_current_user(
+    client: TestClient, db: Session
+) -> None:
+    username = random_email()
+    password = random_lower_string()
+    user_in = UserCreate(email=username, password=password)
+    user = crud.create_user(session=db, user_create=user_in)
+    user_id = user.id
+
+    login_data = {
+        "username": username,
+        "password": password,
+    }
+    r = client.post(f"{settings.API_V1_STR}/login/access-token", data=login_data)
+    tokens = r.json()
+    a_token = tokens["access_token"]
+    headers = {"Authorization": f"Bearer {a_token}"}
+
+    r = client.delete(
+        f"{settings.API_V1_STR}/users/{user_id}",
+        headers=headers,
+    )
+    assert r.status_code == 200
+    deleted_user = r.json()
+    assert deleted_user["message"] == "User deleted successfully"
+
+
+def test_delete_user_not_found(
+    client: TestClient, superuser_token_headers: dict[str, str], db: Session
+) -> None:
+    r = client.delete(
+        f"{settings.API_V1_STR}/users/99999999",
+        headers=superuser_token_headers,
+    )
+    assert r.status_code == 404
+    assert r.json()["detail"] == "User not found"
+
+
+def test_delete_user_current_super_user_error(
+    client: TestClient, superuser_token_headers: dict[str, str], db: Session
+) -> None:
+    super_user = crud.get_user_by_email(session=db, email=settings.FIRST_SUPERUSER)
+    user_id = super_user.id
+
+    r = client.delete(
+        f"{settings.API_V1_STR}/users/{user_id}",
+        headers=superuser_token_headers,
+    )
+    assert r.status_code == 403
+    assert r.json()["detail"] == "Super users are not allowed to delete themselves"
diff --git a/backend/app/tests/scripts/__init__.py b/backend/app/tests/scripts/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/backend/app/tests/scripts/test_backend_pre_start.py b/backend/app/tests/scripts/test_backend_pre_start.py
new file mode 100644
index 0000000000..29173f996e
--- /dev/null
+++ b/backend/app/tests/scripts/test_backend_pre_start.py
@@ -0,0 +1,28 @@
+from unittest.mock import MagicMock
+
+from sqlmodel import select
+
+from app.backend_pre_start import init, logger
+
+
+def test_init_successful_connection(mocker):
+    engine_mock = MagicMock()
+
+    session_mock = MagicMock()
+    exec_mock = MagicMock(return_value=True)
+    session_mock.configure_mock(**{'exec.return_value': exec_mock})
+    mocker.patch('sqlmodel.Session', return_value=session_mock)
+
+    mocker.patch.object(logger, 'info')
+    mocker.patch.object(logger, 'error')
+    mocker.patch.object(logger, 'warn')
+
+    try:
+        init(engine_mock)
+        connection_successful = True
+    except Exception:
+        connection_successful = False
+
+    assert connection_successful, "The database connection should be successful and not raise an exception."
+
+    assert session_mock.exec.called_once_with(select(1)), "The session should execute a select statement once."
diff --git a/backend/app/tests/scripts/test_celery_pre_start.py b/backend/app/tests/scripts/test_celery_pre_start.py
new file mode 100644
index 0000000000..67c3f5cbe0
--- /dev/null
+++ b/backend/app/tests/scripts/test_celery_pre_start.py
@@ -0,0 +1,28 @@
+from unittest.mock import MagicMock
+
+from sqlmodel import select
+
+from app.celeryworker_pre_start import init, logger
+
+
+def test_init_successful_connection(mocker):
+    engine_mock = MagicMock()
+
+    session_mock = MagicMock()
+    exec_mock = MagicMock(return_value=True)
+    session_mock.configure_mock(**{'exec.return_value': exec_mock})
+    mocker.patch('sqlmodel.Session', return_value=session_mock)
+
+    mocker.patch.object(logger, 'info')
+    mocker.patch.object(logger, 'error')
+    mocker.patch.object(logger, 'warn')
+
+    try:
+        init(engine_mock)
+        connection_successful = True
+    except Exception:
+        connection_successful = False
+
+    assert connection_successful, "The database connection should be successful and not raise an exception."
+
+    assert session_mock.exec.called_once_with(select(1)), "The session should execute a select statement once."
diff --git a/backend/app/tests/scripts/test_test_pre_start.py b/backend/app/tests/scripts/test_test_pre_start.py
new file mode 100644
index 0000000000..485338d4e2
--- /dev/null
+++ b/backend/app/tests/scripts/test_test_pre_start.py
@@ -0,0 +1,28 @@
+from unittest.mock import MagicMock
+
+from sqlmodel import select
+
+from app.tests_pre_start import init, logger
+
+
+def test_init_successful_connection(mocker):
+    engine_mock = MagicMock()
+
+    session_mock = MagicMock()
+    exec_mock = MagicMock(return_value=True)
+    session_mock.configure_mock(**{'exec.return_value': exec_mock})
+    mocker.patch('sqlmodel.Session', return_value=session_mock)
+
+    mocker.patch.object(logger, 'info')
+    mocker.patch.object(logger, 'error')
+    mocker.patch.object(logger, 'warn')
+
+    try:
+        init(engine_mock)
+        connection_successful = True
+    except Exception:
+        connection_successful = False
+
+    assert connection_successful, "The database connection should be successful and not raise an exception."
+
+    assert session_mock.exec.called_once_with(select(1)), "The session should execute a select statement once."
diff --git a/backend/app/tests_pre_start.py b/backend/app/tests_pre_start.py
index a9336023b3..0ce6045635 100644
--- a/backend/app/tests_pre_start.py
+++ b/backend/app/tests_pre_start.py
@@ -1,5 +1,6 @@
 import logging
 
+from sqlalchemy import Engine
 from sqlmodel import Session, select
 from tenacity import after_log, before_log, retry, stop_after_attempt, wait_fixed
 
@@ -18,10 +19,10 @@
     before=before_log(logger, logging.INFO),
     after=after_log(logger, logging.WARN),
 )
-def init() -> None:
+def init(db_engine: Engine) -> None:
     try:
         # Try to create session to check if DB is awake
-        with Session(engine) as session:
+        with Session(db_engine) as session:
             session.exec(select(1))
     except Exception as e:
         logger.error(e)
@@ -30,7 +31,7 @@ def init() -> None:
 
 def main() -> None:
     logger.info("Initializing service")
-    init()
+    init(engine)
     logger.info("Service finished initializing")
 
 
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 1f5bc80eb3..54415685b3 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -34,6 +34,7 @@ pytest-cov = "^4.1.0"
 mypy = "^1.8.0"
 ruff = "^0.2.2"
 pre-commit = "^3.6.2"
+pytest-mock = "^3.12.0"
 
 [tool.isort]
 multi_line_output = 3