1 files changed, 2 insertions, 2 deletions
diff --git a/actionpack/lib/action_controller/assertions/response_assertions.rb b/actionpack/lib/action_controller/assertions/response_assertions.rb
index 765225ae24..e2e8bbdc71 100644
--- a/actionpack/lib/action_controller/assertions/response_assertions.rb
+++ b/actionpack/lib/action_controller/assertions/response_assertions.rb
@@ -87,11 +87,11 @@ module ActionController
       #
       def assert_template(expected = nil, message=nil)
         clean_backtrace do
-          rendered = @response.rendered_template
+          rendered = @response.rendered_template.to_s
           msg = build_message(message, "expecting <?> but rendering with <?>", expected, rendered)
           assert_block(msg) do
             if expected.nil?
-              @response.rendered_template.nil?
+              @response.rendered_template.blank?
             else
               rendered.to_s.match(expected)
             end