diff --git a/src/testdir/test_ruby.vim b/src/testdir/test_ruby.vim
index 224dffb..2e0835c 100644
--- a/src/testdir/test_ruby.vim
+++ b/src/testdir/test_ruby.vim
@@ -275,7 +275,7 @@
   call assert_match('Xfoo1$', rubyeval('Vim::Buffer[1].name'))
   call assert_match('Xfoo2$', rubyeval('Vim::Buffer[2].name'))
   call assert_fails('ruby print Vim::Buffer[3].name',
-        \           "NoMethodError: undefined method `name' for nil:NilClass")
+        \           "NoMethodError: undefined method `name' for nil")
   %bwipe
 endfunc