1 files changed, 8 insertions, 4 deletions
diff --git a/spec/ruby/core/math/sqrt_spec.rb b/spec/ruby/core/math/sqrt_spec.rb
index 779aea2a0a..545fa4d1c2 100644
--- a/spec/ruby/core/math/sqrt_spec.rb
+++ b/spec/ruby/core/math/sqrt_spec.rb
@@ -3,7 +3,7 @@ require_relative 'fixtures/classes'
 
 describe "Math.sqrt" do
   it "returns a float" do
-    Math.sqrt(1).should be_kind_of(Float)
+    Math.sqrt(1).should.is_a?(Float)
   end
 
   it "returns the square root of the argument" do
@@ -13,20 +13,24 @@ describe "Math.sqrt" do
   end
 
   it "raises a TypeError if the argument cannot be coerced with Float()" do
-    -> { Math.sqrt("test") }.should raise_error(TypeError)
+    -> { Math.sqrt("test") }.should.raise(TypeError)
   end
 
   it "returns NaN given NaN" do
-    Math.sqrt(nan_value).nan?.should be_true
+    Math.sqrt(nan_value).nan?.should == true
   end
 
   it "raises a TypeError if the argument is nil" do
-    -> { Math.sqrt(nil) }.should raise_error(TypeError)
+    -> { Math.sqrt(nil) }.should.raise(TypeError)
   end
 
   it "accepts any argument that can be coerced with Float()" do
     Math.sqrt(MathSpecs::Float.new).should be_close(1.0, TOLERANCE)
   end
+
+  it "raises a Math::DomainError when given a negative number" do
+    -> { Math.sqrt(-1) }.should.raise(Math::DomainError)
+  end
 end
 
 describe "Math#sqrt" do