I am developing Windows Phone 7.1 app, and want to test it against marketplace requirements. So I use Marketplace test kit. However, when reading about Windows Phone Store Test Kit, I see that
The Marketplace Test Kit installed with Windows Phone SDK 7.1 is obsolete. Use the Store Test Kit installed with Windows Phone SDK 8.0 to test apps that target Windows Phone OS 7.1.
So how can I use Windows Phone Store Test Kit? I don't want to install Windows Phone 8 SDK.
Why do you not wanted to install WP 8 SDK. It installs side by side with the existing WP 7.1 SDK. You can have both the SDK's (in other words -- both the VS versions). So that you can develop in 7.1 and test using 8 SDK.