diff --git a/src/testdir/test_timers.vim b/src/testdir/test_timers.vim
index 85e76eb..2625013 100644
--- a/src/testdir/test_timers.vim
+++ b/src/testdir/test_timers.vim
@@ -116,7 +116,7 @@
   call timer_stop(id)
   call assert_equal([], timer_info(id))
 
-  call assert_fails('call timer_info("abc")', 'E39:')
+  call assert_fails('call timer_info("abc")', 'E1210:')
 
   " check repeat count inside the callback
   let g:timer_repeat = []
@@ -267,7 +267,7 @@
 
   call assert_fails('call timer_start(100, "MyHandler", "abc")', 'E1206:')
   call assert_fails('call timer_start(100, [])', 'E921:')
-  call assert_fails('call timer_stop("abc")', 'E39:')
+  call assert_fails('call timer_stop("abc")', 'E1210:')
 endfunc
 
 func FuncWithCaughtError(timer)