DEV: missing I18n import

DEV: missing I18n import

diff --git a/test/javascripts/acceptance/spoiler-button-test.js.es6 b/test/javascripts/acceptance/spoiler-button-test.js.es6
index bf7be4a..890830a 100644
--- a/test/javascripts/acceptance/spoiler-button-test.js.es6
+++ b/test/javascripts/acceptance/spoiler-button-test.js.es6
@@ -1,3 +1,4 @@
+import I18n from "I18n";
 import selectKit from "helpers/select-kit-helper";
 import { acceptance } from "helpers/qunit-helpers";
 import { clearPopupMenuOptionsCallback } from "discourse/controllers/composer";

GitHub sha: 9468a788