diff --git a/test/helpers/application_helper_test.rb b/test/helpers/application_helper_test.rb
index 730023443..c86ad4621 100644
--- a/test/helpers/application_helper_test.rb
+++ b/test/helpers/application_helper_test.rb
@@ -1326,7 +1326,7 @@ class ApplicationHelperTest < Redmine::HelperTest
       </code></pre>
     RAW
     expected = <<~EXPECTED
-      <pre><code class="ECMA_script syntaxhl"><span class="cm">/* Hello */</span><span class="nb">document</span><span class="p">.</span><span class="nx">write</span><span class="p">(</span><span class="dl">"</span><span class="s2">Hello World!</span><span class="dl">"</span><span class="p">);</span></code></pre>
+      <pre><code class="ECMA_script syntaxhl" data-language=\"ECMA_script\"><span class="cm">/* Hello */</span><span class="nb">document</span><span class="p">.</span><span class="nx">write</span><span class="p">(</span><span class="dl">"</span><span class="s2">Hello World!</span><span class="dl">"</span><span class="p">);</span></code></pre>
     EXPECTED
     assert_equal expected.gsub(%r{[\r\n\t]}, ''), textilizable(raw).gsub(%r{[\r\n\t]}, '')
   end
@@ -1338,7 +1338,7 @@ class ApplicationHelperTest < Redmine::HelperTest
       </code></pre>
     RAW
     expected = <<~EXPECTED
-      <pre><code class=\"ruby syntaxhl\"><span class=\"n\">x</span> <span class=\"o\">=</span> <span class=\"n\">a</span> <span class=\"o\">&amp;</span> <span class=\"n\">b</span></code></pre>
+      <pre><code class=\"ruby syntaxhl\" data-language=\"ruby\"><span class=\"n\">x</span> <span class=\"o\">=</span> <span class=\"n\">a</span> <span class=\"o\">&amp;</span> <span class=\"n\">b</span></code></pre>
     EXPECTED
     with_settings :text_formatting => 'textile' do
       assert_equal expected.gsub(%r{[\r\n\t]}, ''), textilizable(raw).gsub(%r{[\r\n\t]}, '')