From Fedora Project Wiki

You'll want to use this template as follows:

|description=A brief description of the functionality being tested.
|setup=Optionally include information on preparing the test environment
Be as specific as required for the target audience. 
# Start here ...
# Next do this ...
# Finally click that
The following must be true to consider this a successful test run. Be brief ... but explicit. 
# Step #1 completes without error
# The system boots into runlevel 5
# Program completes with exit code 0
|optional=Optionally provide hints for exploratory testing.

This will result in the example page shown below.