diff --git a/src/testdir/test_let.vim b/src/testdir/test_let.vim
index 6dc36ea..2a37c19 100644
--- a/src/testdir/test_let.vim
+++ b/src/testdir/test_let.vim
@@ -338,7 +338,7 @@
   endfunc
   END
   call writefile(text, 'XheredocFail')
-  call assert_fails('source XheredocFail', 'E126:')
+  call assert_fails('source XheredocFail', 'E1145:')
   call delete('XheredocFail')
 
   let text =<< trim CodeEnd
@@ -347,7 +347,7 @@
   endfunc
   CodeEnd
   call writefile(text, 'XheredocWrong')
-  call assert_fails('source XheredocWrong', 'E126:')
+  call assert_fails('source XheredocWrong', 'E1145:')
   call delete('XheredocWrong')
 
   let text =<< trim TEXTend
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index 2b02cb9..1075e17 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -982,6 +982,17 @@
         var&lines =<< trim END
         x
         x
+      enddef
+      defcompile
+  [END]
+  CheckScriptFailure(lines, 'E1145: Missing heredoc end marker: END')
+  delfunc! g:Func
+
+  lines =<< trim [END]
+      def Func()
+        var lines =<< trim END
+        x
+        x
         x
         x
         x
@@ -991,7 +1002,7 @@
       enddef
       call Func()
   [END]
-  CheckScriptFailure(lines, 'E990:')
+  CheckScriptFailure(lines, 'E1145: Missing heredoc end marker: END')
   delfunc! g:Func
 enddef
 
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 13e824a..ccc612f 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -3058,7 +3058,7 @@
   new
   var lines =<< trim END
     vim9script
-    pu=split('abc', '\zs')
+    pu =split('abc', '\zs')
             ->join()
   END
   CheckScriptSuccess(lines)
@@ -3079,6 +3079,13 @@
   xunmap <F3>
 enddef
 
+def Test_white_space_after_command()
+  var lines =<< trim END
+    exit_cb: Func})
+  END
+  CheckDefAndScriptFailure(lines, 'E1144:', 1)
+enddef
+
 " Keep this last, it messes up highlighting.
 def Test_substitute_cmd()
   new