1 files changed, 5 insertions, 5 deletions
diff --git a/spec/ruby/core/math/cbrt_spec.rb b/spec/ruby/core/math/cbrt_spec.rb
index 0b608151ab..4e2383043b 100644
--- a/spec/ruby/core/math/cbrt_spec.rb
+++ b/spec/ruby/core/math/cbrt_spec.rb
@@ -1,9 +1,9 @@
-require File.expand_path('../../../spec_helper', __FILE__)
-require File.expand_path('../fixtures/classes', __FILE__)
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
 
 describe "Math.cbrt" do
   it "returns a float" do
-    Math.cbrt(1).should be_an_instance_of(Float)
+    Math.cbrt(1).should.instance_of?(Float)
   end
 
   it "returns the cubic root of the argument" do
@@ -14,11 +14,11 @@ describe "Math.cbrt" do
   end
 
   it "raises a TypeError if the argument cannot be coerced with Float()" do
-    lambda { Math.cbrt("foobar") }.should raise_error(TypeError)
+    -> { Math.cbrt("foobar") }.should.raise(TypeError)
   end
 
   it "raises a TypeError if the argument is nil" do
-    lambda { Math.cbrt(nil) }.should raise_error(TypeError)
+    -> { Math.cbrt(nil) }.should.raise(TypeError)
   end
 
   it "accepts any argument that can be coerced with Float()" do