diff --git a/src/testdir/test_vim9_cmd.vim b/src/testdir/test_vim9_cmd.vim
index a818d14..c0a4358 100644
--- a/src/testdir/test_vim9_cmd.vim
+++ b/src/testdir/test_vim9_cmd.vim
@@ -131,12 +131,29 @@
 enddef
 
 def Test_while_linebreak()
-  " TODO: line break in :while expression doesn't work yet
   let lines =<< trim END
       vim9script
       let nr = 0
-      while nr < 10 + 3
-            nr = nr + 4
+      while nr <
+              10 + 3
+            nr = nr
+                  + 4
+      endwhile
+      assert_equal(16, nr)
+  END
+  CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      let nr = 0
+      while nr
+            <
+              10
+              +
+              3
+            nr = nr
+                  +
+                  4
       endwhile
       assert_equal(16, nr)
   END