diff --git a/spec/atom-spec.coffee b/spec/atom-spec.coffee
index 74a93a975..3f9a9a2fb 100644
--- a/spec/atom-spec.coffee
+++ b/spec/atom-spec.coffee
@@ -18,6 +18,7 @@ describe "the `atom` global", ->
 
     afterEach ->
       atom.themes.unload()
+      atom.unloadBaseStylesheets()
 
     it "loads the correct values from the theme's ui-variables file", ->
       config.set('core.themes', [project.resolve('themes/theme-with-ui-variables')])