diff --git a/tests/LAUNCH_TESTS b/tests/LAUNCH_TESTS
index 5fcc559..7d6ddc0 100644
--- a/tests/LAUNCH_TESTS
+++ b/tests/LAUNCH_TESTS
@@ -1,7 +1,28 @@
-You need PHPunit.
+Running SemanticScuttle unit tests
+==================================
 
-Then
+Prerequisites
+-------------
+The unit tests use PHPUnit.
+For installation instructions, see http://phpunit.de/
 
-To launch the tests, type in a console situated in the root of the SEMANTICSCUTTLE project (where is the SEMANTICSCUTTLE config file):
 
-phpunit --testdox-html tests/dox.html AllTests tests/allTests.php
+Warning
+-------
+The unit tests are DESTRUCTIBLE! Never ever run them on your
+normal SemanticScuttle database! Always use a different database
+for testing - whole tables are emptied and re-filled during the
+tests, and you will definitely loose all data in there.
+
+
+Running the tests
+-----------------
+To run a single test class, execute it like a normal php script:
+ php tests/BookmarkTest.php
+
+To run *all* the tests, run
+ php tests/AllTests.php
+
+If you want features like code coverage, you need to use
+the phpunit executable:
+ phpunit --coverage-html /tmp/sc-coverage/ tests/AllTests.php