1 files changed, 17 insertions, 3 deletions
diff --git a/test/psych/test_numeric.rb b/test/psych/test_numeric.rb
index 8c3dcd173c..4c012e4562 100644
--- a/test/psych/test_numeric.rb
+++ b/test/psych/test_numeric.rb
@@ -1,6 +1,9 @@
 # frozen_string_literal: true
 require_relative 'helper'
-require 'bigdecimal'
+begin
+  require 'bigdecimal'
+rescue LoadError
+end
 
 module Psych
   ###
@@ -29,13 +32,13 @@ module Psych
     def test_big_decimal_tag
       decimal = BigDecimal("12.34")
       assert_match "!ruby/object:BigDecimal", Psych.dump(decimal)
-    end
+    end if defined?(BigDecimal)
 
     def test_big_decimal_round_trip
       decimal = BigDecimal("12.34")
       $DEBUG = false
       assert_cycle decimal
-    end
+    end if defined?(BigDecimal)
 
     def test_does_not_attempt_numeric
       str = Psych.load('--- 4 roses')
@@ -43,5 +46,16 @@ module Psych
       str = Psych.load('--- 1.1.1')
       assert_equal '1.1.1', str
     end
+
+    # This behavior is not to YML spec, but is kept for backwards compatibility
+    def test_string_with_commas
+      number = Psych.load('--- 12,34,56')
+      assert_equal 123456, number
+    end
+
+    def test_string_with_commas_with_strict_integer
+      str = Psych.load('--- 12,34,56', strict_integer: true)
+      assert_equal '12,34,56', str
+    end
   end
 end