diff --git a/test/test_roo.rb b/test/test_roo.rb
index <HASH>..<HASH> 100644
--- a/test/test_roo.rb
+++ b/test/test_roo.rb
@@ -75,7 +75,7 @@ class TestRoo < Test::Unit::TestCase
             fixture_filename(options[:name], format)))

         end

       rescue => e

-        raise e, "#{e.message} for #{format}"

+        raise e, "#{e.message} for #{format}", e.backtrace

       end

     end

   end
Preserve the original backtrace on with_each_spreadsheet re-raise.