README.md in ezid-client-1.1.1 vs README.md in ezid-client-1.2.0

- old
+ new

@@ -286,9 +286,11 @@
 - authenticate as `TEST_USER`
 - use `TEST_HOST` as the host and `TEST_PORT` as the port
 - use `TEST_ARK_SHOULDER` as the default shoulder
 - log to the null device (instead of default STDERR)
 
+See also https://github.com/duke-libraries/ezid-client/wiki/Mock-Identifier for an example of a mock identifier object.
+
 ## Running the ezid-client tests
 
 See http://ezid.cdlib.org/doc/apidoc.html#testing-the-api.
 
 In order to run the integration tests successfully, you must supply the password for the test account "apitest" (contact EZID).  To run the test suite without the integration tests, use the `rake ci` task.