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-rw-r--r--test/psych/test_yaml.rb6
1 files changed, 6 insertions, 0 deletions
diff --git a/test/psych/test_yaml.rb b/test/psych/test_yaml.rb
index cbda3859e6a..5e1ebb4b4b0 100644
--- a/test/psych/test_yaml.rb
+++ b/test/psych/test_yaml.rb
@@ -1271,4 +1271,10 @@ EOY
yaml = Psych.dump("multi\nline\nstring")
assert_match("|", yaml)
end
+
+ def test_string_starting_with_non_word_character_uses_double_quotes_without_exclamation_mark
+ yaml = Psych.dump("@123'abc")
+ assert_match("\"", yaml)
+ refute_match("!", yaml)
+ end
end