Update test script README. [ci skip]

tests/README.md

@@ -4,7 +4,7 @@ To run the test playbook(s) in this directory:
 
   1. Install and start Docker.
   1. Download the test shim (see .travis.yml file for the URL) into `tests/test.sh`:
-    - `wget -O tests/test.sh wget -O ${PWD}/tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/`
+    - `wget -O tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/`
   1. Make the test shim executable: `chmod +x tests/test.sh`.
   1. Run (from the role root directory) `distro=[distro] playbook=[playbook] ./tests/test.sh`