diff --git a/test/unit/lib/redmine/unified_diff_test.rb b/test/unit/lib/redmine/unified_diff_test.rb
index 1879ebf8f..675d67d84 100644
--- a/test/unit/lib/redmine/unified_diff_test.rb
+++ b/test/unit/lib/redmine/unified_diff_test.rb
@@ -90,15 +90,15 @@ class Redmine::UnifiedDiffTest < ActiveSupport::TestCase
   end
 
   def test_partials_with_html_entities
-    raw = <<-DIFF
+    raw = <<-DIFF.gsub(/^$/, ' ')
 --- 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')