diff --git a/test/unit/lib/redmine/unified_diff_test.rb b/test/unit/lib/redmine/unified_diff_test.rb
index c312a013e..b9a8aff1a 100644
--- a/test/unit/lib/redmine/unified_diff_test.rb
+++ b/test/unit/lib/redmine/unified_diff_test.rb
@@ -90,17 +90,16 @@ class Redmine::UnifiedDiffTest < ActiveSupport::TestCase
   end
 
   def test_partials_with_html_entities
-    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 @@
- Semicolons were mysteriously appearing in code diffs in the repository
- 
--void DoSomething(std::auto_ptr<MyClass> myObj)
-+void DoSomething(const MyClass& myObj)
- 
-DIFF
-
+    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 @@
+       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
     assert_equal 'void DoSomething(<span>std::auto_ptr&lt;MyClass&gt;</span> myObj)', diff.first[2].html_line_left