diff --git a/test/command/test_fluentd.rb b/test/command/test_fluentd.rb
index 8845fc3ea8..461e19ef1b 100644
--- a/test/command/test_fluentd.rb
+++ b/test/command/test_fluentd.rb
@@ -523,7 +523,7 @@ def assert_fluentd_fails_to_start(cmdline, *pattern_list, timeout: 10)
 
       assert_fluentd_fails_to_start(
         create_cmdline(conf_path, "-p", File.dirname(plugin_path)),
-        "in_buggy.rb:5: syntax error, unexpected end-of-input, expecting"
+        "in_buggy.rb:5: syntax error, unexpected end-of-input"
       )
     end
   end