diff --git a/README.md b/README.md
index 99b7e2e..d2423c9 100644
--- a/README.md
+++ b/README.md
@@ -159,7 +159,16 @@ https://github.com/spm2020spring/TeamCollaborationTutorial/blob/master/team.rst
 
 ## Testing
 
-Make sure your changes can pass all the tests in folder [./test](http://121.4.94.30:3000/mrlan/LRR/src/branch/master/test).
+Make sure your changes can pass all the tests in folder ./test.
+
+You cannot do too much unit testing for LRR because it almost does not
+have functions or classes.  However, you can do end-to-end testing.
+It is important that you *restore* the database each time before your
+run a test case.  The fixture *restore_database* in ./test/conftest.py
+is used to restore the database. Please check that.  A use case for
+this fixture can be found in the test script
+./test/SeleniumMpiana/test_bug418_yaaqob.py.  You could run this test script
+by typing the following command: `pytest ./SeleniumMpiana/test_bug418_yaaqob.py`
 
 
 ## Communications Method