diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 2f87ba7..c830121 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -942,15 +942,15 @@
   assert_equal('1_3_', result)
 enddef
 
-" def Test_interrupt_loop()
-"   let x = 0
-"   while 1
-"     x += 1
-"     if x == 100
-"       feedkeys("\<C-C>", 'L')
-"     endif
-"   endwhile
-" enddef
+def Test_interrupt_loop()
+  let x = 0
+  while 1
+    x += 1
+    if x == 100
+      feedkeys("\<C-C>", 'Lt')
+    endif
+  endwhile
+enddef
 
 def Test_substitute_cmd()
   new