diff --git a/test/unit/lib/redmine/syntax_highlighting/rouge_test.rb b/test/unit/lib/redmine/syntax_highlighting/rouge_test.rb
index 129a19cf0..cebc66c7f 100644
--- a/test/unit/lib/redmine/syntax_highlighting/rouge_test.rb
+++ b/test/unit/lib/redmine/syntax_highlighting/rouge_test.rb
@@ -33,6 +33,7 @@ class Redmine::SyntaxHighlighting::RougeTest < ActiveSupport::TestCase
   end
 
   def test_highlight_by_filename_should_distinguish_perl_and_prolog
+    # rubocop:disable Style/RedundantHeredocDelimiterQuotes
     raw_perl = <<~'RAW_PERL'
       #!/usr/bin/perl
       print "Hello, world!\n";
@@ -49,6 +50,7 @@ class Redmine::SyntaxHighlighting::RougeTest < ActiveSupport::TestCase
       <span class="c1">#!/usr/bin/swipl</span>
       <span class="p">:-</span> <span class="ss">writeln</span><span class="p">(</span><span class="ss">'Hello, world!'</span><span class="p">),</span><span class="ss">halt</span><span class="p">.</span>
     EXPECTED_PROLOG
+    # rubocop:enable Style/RedundantHeredocDelimiterQuotes
 
     filename = 'hello.pl'