README.md in trackler-2.2.1.104

- old
+ new

@@ -10,19 +10,25 @@
 
 Hence the difference between the square of the sum of the first
 ten natural numbers and the sum of the squares of the first ten
 natural numbers is 3025 - 385 = 2640.
 
-## Making the Test Suite Pass
 
-1. Get [PHPUnit].
+## Running the tests
 
+1. Go to the root of your PHP exercise directory, which is `<EXERCISM_WORKSPACE>/php`.
+   To find the Exercism workspace run
+
+        % exercism debug | grep Workspace
+
+1. Get [PHPUnit] if you don't have it already.
+
         % wget --no-check-certificate https://phar.phpunit.de/phpunit.phar
         % chmod +x phpunit.phar
 
-2. Execute the tests for an assignment.
+2. Execute the tests:
 
-        % phpunit.phar wordy/wordy_test.php
+        % ./phpunit.phar difference-of-squares/difference-of-squares_test.php
 
 [PHPUnit]: http://phpunit.de
 
 
 ## Source