1 files changed, 8 insertions, 4 deletions
diff --git a/test/json/json_coder_test.rb b/test/json/json_coder_test.rb
index fc4aba2968..c724835376 100755
--- a/test/json/json_coder_test.rb
+++ b/test/json/json_coder_test.rb
@@ -12,7 +12,8 @@ class JSONCoderTest < Test::Unit::TestCase
   end
 
   def test_json_coder_with_proc_with_unsupported_value
-    coder = JSON::Coder.new do |object|
+    coder = JSON::Coder.new do |object, is_key|
+      assert_equal false, is_key
       Object.new
     end
     assert_raise(JSON::GeneratorError) { coder.dump([Object.new]) }
@@ -20,7 +21,10 @@ class JSONCoderTest < Test::Unit::TestCase
 
   def test_json_coder_hash_key
     obj = Object.new
-    coder = JSON::Coder.new(&:to_s)
+    coder = JSON::Coder.new do |obj, is_key|
+      assert_equal true, is_key
+      obj.to_s
+    end
     assert_equal %({#{obj.to_s.inspect}:1}), coder.dump({ obj => 1 })
 
     coder = JSON::Coder.new { 42 }
@@ -49,14 +53,14 @@ class JSONCoderTest < Test::Unit::TestCase
   end
 
   def test_json_coder_dump_NaN_or_Infinity
-    coder = JSON::Coder.new(&:inspect)
+    coder = JSON::Coder.new { |o| o.inspect }
     assert_equal "NaN", coder.load(coder.dump(Float::NAN))
     assert_equal "Infinity", coder.load(coder.dump(Float::INFINITY))
     assert_equal "-Infinity", coder.load(coder.dump(-Float::INFINITY))
   end
 
   def test_json_coder_dump_NaN_or_Infinity_loop
-    coder = JSON::Coder.new(&:itself)
+    coder = JSON::Coder.new { |o| o.itself }
     error = assert_raise JSON::GeneratorError do
       coder.dump(Float::NAN)
     end