diff --git a/tests/playground.html b/tests/playground.html
index 4bf0b31fb..596e8f373 100644
--- a/tests/playground.html
+++ b/tests/playground.html
@@ -395,8 +395,8 @@ h1 {
     </block>
   </xml>
 
-  <!-- toolbox-categories-untyped-variables has a category menu and an
-  auto-closing flyout.  The Variables category uses untyped variable blocks.
+  <!-- toolbox-categories has a category menu and an auto-closing flyout.  The
+  Variables category uses untyped variable blocks.
   See https://developers.google.com/blockly/guides/create-custom-blocks/variables#untyped_variable_blocks for more information. -->
   <xml id="toolbox-categories" style="display: none">
     <category name="Logic" colour="210">
@@ -722,7 +722,7 @@ h1 {
     <category name="Functions" colour="290" custom="PROCEDURE"></category>
   </xml>
 
-  <!-- toolbox-categories-untyped-variables has a category menu and an
+  <!-- toolbox-categories-typed-variables has a category menu and an
   auto-closing flyout.  The Variables category uses typed variable blocks.
   See https://developers.google.com/blockly/guides/create-custom-blocks/variables#typed_variable_blocks for more information. -->
   <xml id="toolbox-categories-typed-variables" style="display: none">