Description: Multi-tenancy testing is a set of procedures designed to ensure that a single instance of an application can efficiently and securely serve multiple tenants or clients. This approach is fundamental in software as a service (SaaS) environments, where several users or organizations share the same infrastructure and codebase but require a level of isolation and customization in their data and configurations. Multi-tenancy testing focuses on validating that the application’s functionalities behave correctly for each tenant, ensuring that there are no interferences between them. This includes verifying data security, resource management, and the ability to scale the application without compromising performance. Additionally, these tests help identify and mitigate potential vulnerabilities that may arise from the interaction between different tenants, thus ensuring the integrity and confidentiality of information. In summary, multi-tenancy testing is essential for the development and maintenance of modern applications operating in shared environments, ensuring that each client receives quality service without the risk of exposure to other tenants’ data.