diff --git a/core/themes/classy/classy.libraries.yml b/core/themes/classy/classy.libraries.yml
index 3c0d663..eb01b06 100644
--- a/core/themes/classy/classy.libraries.yml
+++ b/core/themes/classy/classy.libraries.yml
@@ -33,8 +33,3 @@ search.results:
       css/search/search.theme.css: {}
     component:
       css/taxonomy/taxonomy.theme.css: {}
-
-drupal.taxonomy:
-  css:
-    theme:
-      css/taxonomy/taxonomy.theme.css: {}
diff --git a/core/themes/classy/classy.theme b/core/themes/classy/classy.theme
deleted file mode 100644
index ec93fa5..0000000
--- a/core/themes/classy/classy.theme
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-
-/**
- * @file
- * Functions to support theming in the Classy theme.
- */
-
-/**
- * Implements hook_library_info_alter().
- */
-function classy_library_info_alter(&$libraries, $extension) {
-  if ($extension == 'taxonomy' && isset($libraries['drupal.taxonomy'])) {
-    $libraries['drupal.taxonomy']['dependencies'][] = 'classy/drupal.taxonomy';
-  }
-}
diff --git a/core/themes/classy/css/taxonomy/taxonomy.theme.css b/core/themes/seven/css/components/taxonomy-term.css
similarity index 72%
rename from core/themes/classy/css/taxonomy/taxonomy.theme.css
rename to core/themes/seven/css/components/taxonomy-term.css
index 543666a..23b95d4 100644
--- a/core/themes/classy/css/taxonomy/taxonomy.theme.css
+++ b/core/themes/seven/css/components/taxonomy-term.css
@@ -1,3 +1,7 @@
+/**
+ * @file
+ * Visual styles for taxonomy term admin page.
+ */
 
 .taxonomy-term-preview {
   background-color: #eee;
diff --git a/core/themes/seven/seven.libraries.yml b/core/themes/seven/seven.libraries.yml
index 0b814b5..6902281 100644
--- a/core/themes/seven/seven.libraries.yml
+++ b/core/themes/seven/seven.libraries.yml
@@ -92,3 +92,8 @@ seven.drupal.dialog:
   css:
     theme:
       css/components/dialog.theme.css: {}
+
+taxonomy-term:
+  css:
+    component:
+      css/components/taxonomy-term.css: {}
diff --git a/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
index 1a44bc4..6e4b6b6 100644
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -202,4 +202,8 @@ function seven_library_info_alter(&$libraries, $extension) {
     unset($libraries['drupal.dialog']['css']['theme']['misc/dialog.theme.css']);
     $libraries['drupal.dialog']['dependencies'][] = 'seven/seven.drupal.dialog';
   }
+  if ($extension == 'taxonomy' && isset($libraries['drupal.taxonomy'])) {
+    $libraries['drupal.taxonomy']['dependencies'][] = 'seven/taxonomy-term';
+  }
 }
+