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-rw-r--r--actionpack/lib/action_dispatch/testing/assertions/dom.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/testing/assertions/dom.rb b/actionpack/lib/action_dispatch/testing/assertions/dom.rb
index 9a917f704a..9c215de743 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/dom.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/dom.rb
@@ -1,3 +1,5 @@
+require 'action_controller/vendor/html-scanner'
+
module ActionDispatch
module Assertions
module DomAssertions
@@ -15,7 +17,7 @@ module ActionDispatch
assert_block(full_message) { expected_dom == actual_dom }
end
-
+
# The negated form of +assert_dom_equivalent+.
#
# ==== Examples