Since nanoflows only run clientside: no, you cannot. At least, not via automatic unittesting, like we can with microflows, and which can be incorporated as a step in your deployment street.

But you can create testnanoflows, UT_<MyNanoflow>, like you do with microflows and manually run them from a page so they will run clientside and you see the result.

You can test nanoflows with a marketplace module, Mendix Marketplace - Unittesting for nanoflows (also native!)