FIX: Random failing plugin tests

app/assets/javascripts/discourse/lib/plugin-api.js.es6

@@ -368,6 +368,10 @@ function decorate(klass, evt, cb) {
   klass.reopen(mixin);
 }
 
+export function resetPluginApi() {
+  _pluginv01 = null;
+}
+
 export function decorateCooked() {
   console.warn('`decorateCooked` has been removed. Use `getPluginApi(version).decorateCooked` instead');
 }

plugins/discourse-details/test/javascripts/acceptance/details-button-test.js.es6

@@ -9,10 +9,6 @@ function findTextarea() {
 test('details button', () => {
   visit("/");
 
-  andThen(() => {
-    ok(exists('#create-topic'), 'the create button is visible');
-  });
-
   click('#create-topic');
   click('button.options');
   click('.popup-menu .fa-caret-right');

test/javascripts/helpers/qunit-helpers.js.es6

@@ -4,6 +4,7 @@ import sessionFixtures from 'fixtures/session-fixtures';
 import siteFixtures from 'fixtures/site-fixtures';
 import HeaderComponent from 'discourse/components/site-header';
 import { forceMobile, resetMobile } from 'discourse/lib/mobile';
+import { resetPluginApi } from 'discourse/lib/plugin-api';
 
 function currentUser() {
   return Discourse.User.create(sessionFixtures['/session/current.json'].current_user);
@@ -74,6 +75,7 @@ function acceptance(name, options) {
       Discourse.User.resetCurrent();
       Discourse.Site.resetCurrent(Discourse.Site.create(jQuery.extend(true, {}, fixtures['site.json'].site)));
 
+      resetPluginApi();
       Discourse.reset();
     }
   });