There are two options available in Scalar which can make your workouts more fun.
Play Scale configures Scalar to just play the chords and not play the scale “answer” as part of the ear training exercise. This frees you up to just improvise within the scale as you like. I often found myself just blowing over the top of the answer anyway so why not just let people turn it off.
Show Root can add a bit of challenge to ear training. Especially when you set the root movement to random or common note. This setting tells Scalar to not display the root at the beginning of the exercise. You’ll have to use your ears to determine the root and chord.
In newer versions, go to the Settings page (click the gear icon in the upper right corner of the Ear Training view). In previous versions, there are checkboxes at the bottom of the Ear Training view.