diff --git a/src/editor/editor.js b/src/editor/editor.js
index 1f58ef1f..027706ae 100644
--- a/src/editor/editor.js
+++ b/src/editor/editor.js
@@ -275,6 +275,7 @@ export default class Editor {
 			this.commands.execute( ...args );
 		} catch ( err ) {
 			// @if CK_DEBUG // throw err;
+			/* istanbul ignore next */
 			CKEditorError.rethrowUnexpectedError( err, this );
 		}
 	}