diff --git a/sandbox.html b/sandbox.html
index b3209cc..7a947f6 100644
--- a/sandbox.html
+++ b/sandbox.html
@@ -613,6 +613,7 @@ <h1>Overture Maps DuckDB Sandbox</h1>
         </summary>
         <div class="editor-wrapper">
           <textarea id="setup-editor" class="sql-editor" spellcheck="false">-- Install and load extensions
+SELECT * FROM duckdb_coordinate_systems();
 INSTALL spatial;
 LOAD spatial;
 INSTALL httpfs;