Maybe you have don this for brevity, but git branch does not create a new commit. "The command’s second form creates a new branch head named <branchname> which

Maybe you have don this for brevity, but git branch does not create a new commit. "The command’s second form creates a new branch head named <branchname> which points to the current HEAD, or <start-point> if given." So after a git branch command, the test branch still points to the same commit as HEAD. You have to make an additional commit for them to diverge.