diff --git a/middleman-core/lib/middleman-core/step_definitions/server_steps.rb b/middleman-core/lib/middleman-core/step_definitions/server_steps.rb
index c61ec39d..d21c87a2 100644
--- a/middleman-core/lib/middleman-core/step_definitions/server_steps.rb
+++ b/middleman-core/lib/middleman-core/step_definitions/server_steps.rb
@@ -91,6 +91,10 @@ Then /^I should not see "([^\"]*)"$/ do |expected|
   expect(@browser.last_response.body).to_not include(expected)
 end
 
+Then /^I should not see:$/ do |expected|
+  expect(@browser.last_response.body).to_not include(expected.chomp)
+end
+
 Then /^I should see "([^\"]*)" lines$/ do |lines|
   expect(@browser.last_response.body.chomp.split($/).length).to eq(lines.to_i)
 end