Git has two types of branches: local and remote. To use git pull and git push as you'd like, you have to tell your local branch (my_test) which remote branch it's tracking. In typical Git fashion this can be done in both the config file and with commands.
Commands
Make sure you're on your master branch with
1)git checkout master
then create the new branch with
2)git branch --track my_test origin/my_test
and check it out with
3)git checkout my_test.
You can then push and pull without specifying which local and remote.
However if you've already created the branch then you can use the -u switch to tell git's push and pull you'd like to use the specified local and remote branches from now on, like so:
git pull -u my_test origin/my_test
git push -u my_test origin/my_test
Config
The commands to setup remote branch tracking are fairly straight forward but I'm listing the config way as well as I find it easier if I'm setting up a bunch of tracking branches. Using your favourite editor open up your project's .git/config and add the following to the bottom.
[remote "origin"]
url = [email protected]:username/repo.git
fetch = +refs/heads/*:refs/remotes/origin/*
[branch "my_test"]
remote = origin
merge = refs/heads/my_test
This specifies a remote called origin, in this case a GitHub style one, and then tells the branch my_test to use it as it's remote.
You can find something very similar to this in the config after running the commands above.
Some useful resources: