diff --git a/addons/web_editor/static/src/js/editor/odoo-editor/test/spec/utils.test.js b/addons/web_editor/static/src/js/editor/odoo-editor/test/spec/utils.test.js
index d43e73464c7..6e22d6d2d74 100644
--- a/addons/web_editor/static/src/js/editor/odoo-editor/test/spec/utils.test.js
+++ b/addons/web_editor/static/src/js/editor/odoo-editor/test/spec/utils.test.js
@@ -404,6 +404,11 @@ describe('Utils', () => {
             const result = closestBlock(p);
             window.chai.expect(result).to.equal(p);
         });
+        it('should return null if no block ancestor', () => {
+            const node = document.createTextNode('\n        ');
+            window.chai.expect(closestBlock(node)).to.equal(null);
+            window.chai.expect(isVisibleTextNode(node)).to.equal(false);
+        });
     });
     describe('lastLeaf', () => {
         it('should find the last leaf of a child-rich block', () => {