diff --git a/tests/view/observer/selectionobserver.js b/tests/view/observer/selectionobserver.js
index 6fb87742d..315766cf2 100644
--- a/tests/view/observer/selectionobserver.js
+++ b/tests/view/observer/selectionobserver.js
@@ -242,6 +242,10 @@ describe( 'SelectionObserver', () => {
 
 				for ( let i = 0; i < 50; i++ ) {
 					changeDomSelection();
+
+					if ( env.isEdge ) {
+						extendDomSelection();
+					}
 				}
 			} );
 		}