Here’s a little exercise that can help you get handy with the basic intervals between the root and perfect fifth of a triad. Click on the image to enlarge it. I normally run the pattern over major-quality chords, but it should work fine over minor as well. For that reason, I’ve shown only chord roots over each bar without getting more specific about chord quality.
Other than that, I don’t think the exercise needs much explaining. It’s a nice way to build your chops, and it’ll also open your ears, particularly if you play it slowly enough to clearly hear the different intervals.
If you find this exercise helpful, you’ll find many more like it on my Jazz Theory, Technique & Solo Transcriptions page.