gistfile1.diff

diff --git a/spec/ruby/core/bignum/bit_xor_spec.rb b/spec/ruby/core/bignum/bit_xor_spec.rb
index 38a5850..26a38ea 100644
--- a/spec/ruby/core/bignum/bit_xor_spec.rb
+++ b/spec/ruby/core/bignum/bit_xor_spec.rb
@@ -11,6 +11,18 @@ describe "Bignum#^" do
     (@bignum ^ 14).should == 9223372036854775836
   end
 
+  it "returns self bitwise EXCLUSIVE OR negative other when one operand is negative" do
+    (@bignum ^ -0x40000000000000000).should == -64563604257983430638
+    (@bignum ^ -@bignum).should == -4
+    (@bignum ^ -0x8000000000000000).should == -18446744073709551598
+  end
+
+  it "returns self bitwise EXCLUSIVE OR negative other when both operands is negative" do
+    (-@bignum ^ -0x40000000000000000).should == 64563604257983430638
+    (-@bignum ^ -@bignum).should == 0
+    (-@bignum ^ -0x4000000000000000).should == 13835058055282163694
+  end
+