The new external classes/exporters are covered by unit tests, to manually test you can do the following: Log in as admin Enable web service Enable web service protocols at admin/settings.php?section=webserviceprotocols Generate, and make note of, token for the admin user Select Reports from the user menu Create a new report from Users report source Make a note of the report ID (look at URL: reportbuilder/edit.php?id=<REPORTID> ) Execute the following web service request $ curl --silent "<WWROOT>/webservice/rest/server.php?moodlewsrestformat=json" --data "wstoken=<TOKEN>&wsfunction=core_reportbuilder_retrieve_report&reportid=<REPORTID>" | python -m "json.tool" Confirm the following output: { "data": [ { // Report data. }, "details": [ { // Report details. }, ], "warnings": [] } Confirm that the "Report data" contains the data within your report: "headers" should contain a list of headers "rows" should contain an array of items, each containing a "columns" property with the actual row data "totalrowcount" should contain total row count Confirm that the "Report details" contains information about the report you created (name, source, modified by, etc)