diff --git a/actionview/lib/action_view/helpers/capture_helper.rb b/actionview/lib/action_view/helpers/capture_helper.rb
index 5afe4354597..75d1634b2e2 100644
--- a/actionview/lib/action_view/helpers/capture_helper.rb
+++ b/actionview/lib/action_view/helpers/capture_helper.rb
@@ -202,15 +202,6 @@ module ActionView
       ensure
         self.output_buffer = old_buffer
       end
-
-      # Add the output buffer to the response body and start a new one.
-      def flush_output_buffer #:nodoc:
-        if output_buffer && !output_buffer.empty?
-          response.stream.write output_buffer
-          self.output_buffer = output_buffer.respond_to?(:clone_empty) ? output_buffer.clone_empty : output_buffer[0, 0]
-          nil
-        end
-      end
     end
   end
 end
diff --git a/actionview/test/template/capture_helper_test.rb b/actionview/test/template/capture_helper_test.rb
index 938f1c3e543..f213da5934a 100644
--- a/actionview/test/template/capture_helper_test.rb
+++ b/actionview/test/template/capture_helper_test.rb
@@ -207,29 +207,6 @@ class CaptureHelperTest < ActionView::TestCase
     assert_equal "", @av.with_output_buffer {}
   end
 
-  def test_flush_output_buffer_concats_output_buffer_to_response
-    view = view_with_controller
-    assert_equal [], view.response.body_parts
-
-    view.output_buffer << 'OMG'
-    view.flush_output_buffer
-    assert_equal ['OMG'], view.response.body_parts
-    assert_equal '', view.output_buffer
-
-    view.output_buffer << 'foobar'
-    view.flush_output_buffer
-    assert_equal ['OMG', 'foobar'], view.response.body_parts
-    assert_equal '', view.output_buffer
-  end
-
-  def test_flush_output_buffer_preserves_the_encoding_of_the_output_buffer
-    view = view_with_controller
-    alt_encoding = alt_encoding(view.output_buffer)
-    view.output_buffer.force_encoding(alt_encoding)
-    flush_output_buffer
-    assert_equal alt_encoding, view.output_buffer.encoding
-  end
-
   def alt_encoding(output_buffer)
     output_buffer.encoding == Encoding::US_ASCII ? Encoding::UTF_8 : Encoding::US_ASCII
   end
diff --git a/actionview/test/template/output_buffer_test.rb b/actionview/test/template/output_buffer_test.rb
deleted file mode 100644
index eb0df3d1abd..00000000000
--- a/actionview/test/template/output_buffer_test.rb
+++ /dev/null
@@ -1,59 +0,0 @@
-require 'abstract_unit'
-
-class OutputBufferTest < ActionController::TestCase
-  class TestController < ActionController::Base
-    def index
-      render :text => 'foo'
-    end
-  end
-
-  tests TestController
-
-  def setup
-    @vc = @controller.view_context
-    get :index
-    assert_equal ['foo'], body_parts
-  end
-
-  test 'output buffer is nil after rendering' do
-    assert_nil output_buffer
-  end
-
-  test 'flushing ignores nil output buffer' do
-    @controller.view_context.flush_output_buffer
-    assert_nil output_buffer
-    assert_equal ['foo'], body_parts
-  end
-
-  test 'flushing ignores empty output buffer' do
-    @vc.output_buffer = ''
-    @vc.flush_output_buffer
-    assert_equal '', output_buffer
-    assert_equal ['foo'], body_parts
-  end
-
-  test 'flushing appends the output buffer to the body parts' do
-    @vc.output_buffer = 'bar'
-    @vc.flush_output_buffer
-    assert_equal '', output_buffer
-    assert_equal ['foo', 'bar'], body_parts
-  end
-
-  test 'flushing preserves output buffer encoding' do
-    original_buffer = ' '.force_encoding(Encoding::EUC_JP)
-    @vc.output_buffer = original_buffer
-    @vc.flush_output_buffer
-    assert_equal ['foo', original_buffer], body_parts
-    assert_not_equal original_buffer, output_buffer
-    assert_equal Encoding::EUC_JP, output_buffer.encoding
-  end
-
-  protected
-    def output_buffer
-      @vc.output_buffer
-    end
-
-    def body_parts
-      @controller.response.body_parts
-    end
-end