Update README

test/README.md

@@ -12,7 +12,9 @@ real-world cost associated with running the tests. Be aware of that prior
 to running the tests. Additionally, many tests will leave left-over artifacts
 (AMIs) that you'll have to manually clean up.
 
-## Required Software
+## Running Tests
+
+### Required Software
 
 Before running the tests, you'll need the following installed. If you're
 running on Mac OS X, most of these are available with `brew`:
@@ -21,7 +23,7 @@ running on Mac OS X, most of these are available with `brew`:
 
 * [AWS cli](http://aws.amazon.com/cli/)
 
-## Configuring Tests
+### Configuring Tests
 
 **For tests that require AWS credentials:**
 
@@ -30,7 +32,7 @@ Set the following self-explanatory environmental variables:
 * `AWS_ACCESS_KEY_ID`
 * `AWS_SECRET_ACCESS_KEY`
 
-## Running Tests
+### Running
 
 These tests are meant to be run _one file at a time_. There are some
 test files (such as the amazon-chroot builder test) that simply won't
@@ -40,3 +42,10 @@ never work.
 If you're working on Packer and want to test that your change didn't
 adversely affect something, try running only the test that is related to
 your change.
+
+```
+$ bats builder_amazon_ebs.bats
+```
+
+Note: Working directory doesn't matter. You can call the bats test file
+from any directory.