<!-- A clear and concise description of what you expected to happen. -->
**To Reproduce**
-Please try to provide a [Minimal, Complete, and Verifiable](http://stackoverflow.com/help/mcve) example.
-See also [Reporting Bugs](https://www.sqlalchemy.org/participate.html#bugs) on the website, and some [example issues](https://github.com/sqlalchemy/sqlalchemy/issues?q=label%3A%22great+mcve%22)
+Please try to provide a [Minimal, Complete, and Verifiable](http://stackoverflow.com/help/mcve) example.
+See also [Reporting Bugs](https://www.sqlalchemy.org/participate.html#bugs) on the website, and some [example issues](https://github.com/sqlalchemy/sqlalchemy/issues?q=label%3A%22great+mcve%22).
+
+**Please do not use Flask-SQLAlchemy or any other third-party extensions or dependencies in test cases**. The test case must illustrate the problem **without** using any third party SQLAlchemy extensions. Otherwise, please report the bug to those projects first.
```py
# Insert code here
```
**Versions.**
- - OS:
+ - OS:
- Python:
- SQLAlchemy:
- Database: