How do I turn off feature testing in the Test Explorer window

I run Unit Tests categorized by Class in the TEST Explorer window.
Others on my team have written Feature Tests or automated integration Tests.

In Visual Studio 2013 the integration tests did not show up for me in the Test Explorer window which is fine with me because I am not involved in that.
I just want to be able to run my integration tests quickly.
But the feature tests take a long time.

Now in VS 2015, the feature tests are showing up for me.
Is there a setting to have these not show up in the Test Explorer window?  And basically not be discovered?

Also, if I go to Tools -> Options, I expect to see a "Test Tools" option.  But its not there.