1 files changed, 19 insertions, 7 deletions
diff --git a/spec/ruby/core/kernel/extend_spec.rb b/spec/ruby/core/kernel/extend_spec.rb
index 2dbc224177..a344c7b5ca 100644
--- a/spec/ruby/core/kernel/extend_spec.rb
+++ b/spec/ruby/core/kernel/extend_spec.rb
@@ -46,20 +46,20 @@ describe "Kernel#extend" do
   end
 
   it "makes the class a kind_of? the argument" do
-    class C
+    c = Class.new do
       extend KernelSpecs::M
     end
-    (C.kind_of? KernelSpecs::M).should == true
+    (c.kind_of? KernelSpecs::M).should == true
   end
 
   it "raises an ArgumentError when no arguments given" do
-    lambda { Object.new.extend }.should raise_error(ArgumentError)
+    -> { Object.new.extend }.should.raise(ArgumentError)
   end
 
   it "raises a TypeError when the argument is not a Module" do
     o = mock('o')
     klass = Class.new
-    lambda { o.extend(klass) }.should raise_error(TypeError)
+    -> { o.extend(klass) }.should.raise(TypeError)
   end
 
   describe "on frozen instance" do
@@ -69,11 +69,23 @@ describe "Kernel#extend" do
     end
 
     it "raises an ArgumentError when no arguments given" do
-      lambda { @frozen.extend }.should raise_error(ArgumentError)
+      -> { @frozen.extend }.should.raise(ArgumentError)
     end
 
-    it "raises a #{frozen_error_class}" do
-      lambda { @frozen.extend @module }.should raise_error(frozen_error_class)
+    it "raises a FrozenError" do
+      -> { @frozen.extend @module }.should.raise(FrozenError)
     end
   end
+
+  it "updated class methods of a module when it extends self and includes another module" do
+    a = Module.new do
+      extend self
+    end
+    b = Module.new do
+      def foo; :foo; end
+    end
+
+    a.include b
+    a.foo.should == :foo
+  end
 end