1 files changed, 8 insertions, 2 deletions
diff --git a/spec/mspec/spec/helpers/numeric_spec.rb b/spec/mspec/spec/helpers/numeric_spec.rb
index e65f3e8610..64495b7276 100644
--- a/spec/mspec/spec/helpers/numeric_spec.rb
+++ b/spec/mspec/spec/helpers/numeric_spec.rb
@@ -4,11 +4,17 @@ require 'mspec/helpers'
 
 RSpec.describe Object, "#bignum_value" do
   it "returns a value that is an instance of Bignum on any platform" do
-    expect(bignum_value).to eq(0x8000_0000_0000_0000)
+    expect(bignum_value).to be > fixnum_max
   end
 
   it "returns the default value incremented by the argument" do
-    expect(bignum_value(42)).to eq(0x8000_0000_0000_002a)
+    expect(bignum_value(42)).to eq(bignum_value + 42)
+  end
+end
+
+RSpec.describe Object, "-bignum_value" do
+  it "returns a value that is an instance of Bignum on any platform" do
+    expect(-bignum_value).to be < fixnum_min
   end
 end