diff --git a/test/spec/ol/interaction/modifyinteraction.test.js b/test/spec/ol/interaction/modifyinteraction.test.js
index e8cdc3b9c8..26da70ba5f 100644
--- a/test/spec/ol/interaction/modifyinteraction.test.js
+++ b/test/spec/ol/interaction/modifyinteraction.test.js
@@ -59,6 +59,7 @@ describe('ol.interaction.Modify', function() {
    * @param {number} x Horizontal offset from map center.
    * @param {number} y Vertical offset from map center.
    * @param {boolean=} opt_shiftKey Shift key is pressed.
+   * @param {number} button The mouse button.
    */
   function simulateEvent(type, x, y, opt_shiftKey, button) {
     var viewport = map.getViewport();
@@ -82,7 +83,7 @@ describe('ol.interaction.Modify', function() {
    * Tracks events triggered by the interaction as well as feature
    * modifications. Helper function to
    * @param {ol.Feature} feature Modified feature.
-   * @param {ol.interaction.Modify} interaction
+   * @param {ol.interaction.Modify} interaction The interaction.
    * @return {Array<ol.interaction.ModifyEvent|string>} events
    */
   function trackEvents(feature, interaction) {
@@ -103,8 +104,8 @@ describe('ol.interaction.Modify', function() {
   * Validates the event array to verify proper event sequence. Checks
   * that first and last event are correct ModifyEvents and that feature
   * modifications event are in between.
-  * @param {Array<ol.interaction.ModifyEvent|string>} event
-  * @param {Array<ol.Feature>} features
+  * @param {Array<ol.interaction.ModifyEvent|string>} events The events.
+  * @param {Array<ol.Feature>} features The features.
   */
   function validateEvents(events, features) {