No but you can add an external tool.
Go to Tools | External Tools… and click Add
Title: xUnit Test
Command: xunit.console.exe (set to full path to console test runner)
Arguments: $(BinDir)$(TargetName)$(TargetExt)
Initial directory: $(BinDir)
Click Use Output Window
Click OK. This adds the xUnit Test command to the Tools menu.
You can then create a shortcut key to making running the external tool easier. eg: Ctrl +T