diff --git a/decidim-dev/lib/decidim/dev/test/w3c_rspec_validators_overrides.rb b/decidim-dev/lib/decidim/dev/test/w3c_rspec_validators_overrides.rb
index c015c60194e4..41987792be03 100644
--- a/decidim-dev/lib/decidim/dev/test/w3c_rspec_validators_overrides.rb
+++ b/decidim-dev/lib/decidim/dev/test/w3c_rspec_validators_overrides.rb
@@ -1,5 +1,41 @@
 # frozen_string_literal: true
 
+# This is a temporary fix to ignore some HTML/CSS validation issues with the
+# Decidim HTML validation process.
+#
+# See: https://github.com/decidim/decidim/pull/10014
+# Related:
+# - https://github.com/rails/rails/issues/46405
+# - https://github.com/foundation/foundation-sites/pull/12496
+module W3CValidators
+  class NuValidator
+    protected
+
+    alias validate_nu validate unless method_defined?(:validate_nu)
+
+    def validate(options) # :nodoc:
+      filter_results(validate_nu(options))
+    end
+
+    def ignore_errors
+      @ignore_errors ||= [
+        "An “input” element with a “type” attribute whose value is “hidden” must not have an “autocomplete” attribute whose value is “on” or “off”.",
+        "An “input” element with a “type” attribute whose value is “hidden” must not have any “aria-*” attributes."
+      ]
+    end
+
+    def filter_results(results)
+      messages = results.instance_variable_get(:@messages)
+      messages.delete_if do |msg|
+        msg.is_error? && ignore_errors.include?(msg.message)
+      end
+      results.instance_variable_set(:@validity, messages.none?(&:is_error?))
+
+      results
+    end
+  end
+end
+
 # This allows us to dynamically load the validator URL from the ENV.
 module W3cRspecValidators
   class Config