diff --git a/test/json/json_encoding_test.rb b/test/json/json_encoding_test.rb
index 4e086ef84a..cc7b71553a 100644
--- a/test/json/json_encoding_test.rb
+++ b/test/json/json_encoding_test.rb
@@ -79,8 +79,8 @@ class JSONEncodingTest < Test::Unit::TestCase
     json = '["\ud840\udc01"]'
     assert_equal json, generate(utf8, :ascii_only => true)
     assert_equal utf8, parse(json)
-    assert_raises(JSON::ParserError) { parse('"\u"') }
-    assert_raises(JSON::ParserError) { parse('"\ud800"') }
+    assert_raise(JSON::ParserError) { parse('"\u"') }
+    assert_raise(JSON::ParserError) { parse('"\ud800"') }
   end
 
   def test_chars