diff --git a/test/unit/lib/redmine/export/pdf_test.rb b/test/unit/lib/redmine/export/pdf_test.rb
new file mode 100644
index 000000000..371c0caac
--- /dev/null
+++ b/test/unit/lib/redmine/export/pdf_test.rb
@@ -0,0 +1,32 @@
+# Redmine - project management software
+# Copyright (C) 2006-2011  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require File.expand_path('../../../../../test_helper', __FILE__)
+
+class PdfTest < ActiveSupport::TestCase
+
+  def test_fix_text_encoding_backslash_ascii
+    pdf = Redmine::Export::PDF::IFPDF.new('ja')
+    assert pdf
+    assert_equal '\\\\abcd', pdf.fix_text_encoding('\\abcd')
+    assert_equal 'abcd\\\\', pdf.fix_text_encoding('abcd\\')
+    assert_equal 'ab\\\\cd', pdf.fix_text_encoding('ab\\cd')
+    assert_equal '\\\\abcd\\\\', pdf.fix_text_encoding('\\abcd\\')
+    assert_equal '\\\\abcd\\\\abcd\\\\',
+                 pdf.fix_text_encoding('\\abcd\\abcd\\')
+  end
+end