diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 50dc2a0..06b5ecd 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -263,7 +263,7 @@
   CheckDefFailure(['extend({a: 1}, {b: 2}, 1)'], 'E1013: Argument 3: type mismatch, expected string but got number')
 
   CheckDefFailure(['extend([1], ["b"])'], 'E1013: Argument 2: type mismatch, expected list<number> but got list<string>')
-  CheckDefExecFailure(['extend([1], ["b", 1])'], 'E1012: Type mismatch; expected list<number> but got list<any>')
+  CheckDefExecFailure(['extend([1], ["b", 1])'], 'E1013: Argument 2: type mismatch, expected list<number> but got list<any>')
 enddef
 
 def Test_extendnew()
diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index 1aab9d5..f40bcf0 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -934,7 +934,7 @@
         'return Ref(g:value)\_s*' ..
         '\d LOADG g:value\_s*' ..
         '\d LOAD $0\_s*' ..
-        '\d CHECKTYPE number stack\[-2\]\_s*' ..
+        '\d CHECKTYPE number stack\[-2\] arg 1\_s*' ..
         '\d PCALL (argc 1)\_s*' ..
         '\d RETURN',
         instr)
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index da0a0e6..fc1ed21 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -144,6 +144,22 @@
   assert_fails('ReturnGlobal()', 'E1012: Type mismatch; expected number but got string', '', 1, 'ReturnGlobal')
 enddef
 
+def Test_check_argument_type()
+  var lines =<< trim END
+      vim9script
+      def Val(a: number, b: number): number
+        return 0
+      enddef
+      def Func()
+        var x: any = true
+        Val(0, x)
+      enddef
+      disass Func
+      Func()
+  END
+  CheckScriptFailure(lines, 'E1013: Argument 2: type mismatch, expected number but got bool', 2)
+enddef
+
 def Test_missing_return()
   CheckDefFailure(['def Missing(): number',
                    '  if g:cond',