2 files changed, 4 insertions, 3 deletions
diff --git a/README.md b/README.md
index d5ff32d..f9cd95d 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ generate a JSON document from an array or hash:
 
 ```ruby
 document = JSON 'test'  => 23 # => "{\"test\":23}"
-document = JSON['test'] => 23 # => "{\"test\":23}"
+document = JSON['test' => 23] # => "{\"test\":23}"
 ```
 
 and
diff --git a/tests/json_generator_test.rb b/tests/json_generator_test.rb
index 18b0833..86be398 100644
--- a/tests/json_generator_test.rb
+++ b/tests/json_generator_test.rb
@@ -277,12 +277,13 @@ EOT
   if defined?(JSON::Ext::Generator)
     def test_broken_bignum # [ruby-core:38867]
       pid = fork do
-        Bignum.class_eval do
+        x = 1 << 64
+        x.class.class_eval do
           def to_s
           end
         end
         begin
-          JSON::Ext::Generator::State.new.generate(1<<64)
+          JSON::Ext::Generator::State.new.generate(x)
           exit 1
         rescue TypeError
           exit 0