diff --git a/lexer/lexer_test.yml b/lexer/lexer_test.yml
index 5c4d5f0f..d85afb41 100644
--- a/lexer/lexer_test.yml
+++ b/lexer/lexer_test.yml
@@ -674,7 +674,6 @@ lex reports useful unknown character error:
   - name: question mark
     input: "?"
     error:
-      message: 'Cannot parse the unexpected character "?".'
       message: 'Cannot parse the unexpected character "?".'
       locations: [{ line: 1, column: 1 }]