diff --git a/test/support/helpers/charge_version.helper.js b/test/support/helpers/charge_version.helper.js
index dd31238cea..07eaf4f1e6 100644
--- a/test/support/helpers/charge_version.helper.js
+++ b/test/support/helpers/charge_version.helper.js
@@ -9,7 +9,25 @@ const { db } = require('../../../db/db')
 const LicenceHelper = require('./licence.helper.js')
 
 class ChargeVersionHelper {
-  static async add (data, licence = {}) {
+  /**
+   * Add a new charge version
+   *
+   * A charge version is always linked to a licence. So, creating a charge version will automatically create a new
+   * licence and handle linking the two together by `licence_id`.
+   *
+   * If no `data` is provided, default values will be used. These are
+   *
+   * - `scheme` - sroc
+   * - `licence_ref` - 01/123
+   *
+   * See `LicenceHelper` for the licence defaults
+   *
+   * @param {Object} [data] Any data you want to use instead of the defaults used here or in the database
+   * @param {Object} [licence] Any licence data you want to use instead of the defaults used here or in the database
+   *
+   * @returns {string} The ID of the newly created record
+   */
+  static async add (data = {}, licence = {}) {
     const licenceId = await this._addLicence(licence)
     const insertData = this._defaults({ ...data, licence_id: licenceId })
 
diff --git a/test/support/helpers/licence.helper.js b/test/support/helpers/licence.helper.js
index 6712afe500..8cd1b0fd0c 100644
--- a/test/support/helpers/licence.helper.js
+++ b/test/support/helpers/licence.helper.js
@@ -7,6 +7,17 @@
 const { db } = require('../../../db/db')
 
 class LicenceHelper {
+  /**
+   * Add a new licence
+   *
+   * If no `data` is provided, default values will be used. These are
+   *
+   * - `licence_ref` - 01/123
+   *
+   * @param {Object} [data] Any data you want to use instead of the defaults used here or in the database
+   *
+   * @returns {string} The ID of the newly created record
+   */
   static async add (data) {
     const insertData = this._defaults(data)
     const result = await db.table('water.licences')