diff --git a/doc/langref.html.in b/doc/langref.html.in
index 4efa7d0e3c..ce07d6494a 100644
--- a/doc/langref.html.in
+++ b/doc/langref.html.in
@@ -3422,10 +3422,11 @@ test "call foo" {
       <p>
       Blocks are used to limit the scope of variable declarations:
       </p>
-      {#code_begin|test_err|unused local variable#}
+      {#code_begin|test_err|use of undeclared identifier 'x'#}
 test "access variable after block scope" {
     {
         var x: i32 = 1;
+        _ = x;
     }
     x += 1;
 }