diff --git a/test/unit/lib/redmine/unified_diff_test.rb b/test/unit/lib/redmine/unified_diff_test.rb
index 87e9d072f..4fe7a751a 100644
--- a/test/unit/lib/redmine/unified_diff_test.rb
+++ b/test/unit/lib/redmine/unified_diff_test.rb
@@ -92,12 +92,12 @@ class Redmine::UnifiedDiffTest < ActiveSupport::TestCase
     raw = <<~DIFF
       --- test.orig.txt Wed Feb 15 16:10:39 2012
       +++ test.new.txt  Wed Feb 15 16:11:25 2012
-      @@ -1,5 +1,5 @@
+      @@ -1,4 +1,4 @@
        Semicolons were mysteriously appearing in code diffs in the repository
-        
+       ```
       -void DoSomething(std::auto_ptr<MyClass> myObj)
       +void DoSomething(const MyClass& myObj)
-       
+       ```
     DIFF
     diff = Redmine::UnifiedDiff.new(raw, :type => 'sbs')
     assert_equal 1, diff.size