diff --git a/pygal/formatters.py b/pygal/formatters.py
index 458f068..483cb45 100644
--- a/pygal/formatters.py
+++ b/pygal/formatters.py
@@ -20,6 +20,8 @@
 Formatters to use with `value_formatter` and `x_value_formatter` configs
 
 """
+from __future__ import division
+
 from datetime import datetime, date, time
 from math import floor, log
 from pygal._compat import u, to_str
diff --git a/pygal/test/test_config.py b/pygal/test/test_config.py
index eabe09a..111719a 100644
--- a/pygal/test/test_config.py
+++ b/pygal/test/test_config.py
@@ -515,11 +515,11 @@ def test_formatters(Chart):
         return
     chart = Chart(formatter=lambda x, chart, serie: '%s%s$' % (
             x, serie.title))
-    chart.add('_a', [1, 2, {'value': 3, 'formatter': lambda x: '%s¥' % x}])
-    chart.add('_b', [4, 5, 6], formatter=lambda x: '%s€' % x)
+    chart.add('_a', [1, 2, {'value': 3, 'formatter': lambda x: u('%s¥') % x}])
+    chart.add('_b', [4, 5, 6], formatter=lambda x: u('%s€') % x)
     chart.x_labels = [2, 4, 6]
     chart.x_labels_major = [4]
     q = chart.render_pyquery()
-    assert {v.text for v in q(".value")} == set((
-        '4€', '5€', '6€', '1_a$', '2_a$', '3¥') + (
-            ('6_a$', '15€') if Chart == Pie else ()))
+    assert set([v.text for v in q(".value")]) == set((
+        u('4€'), u('5€'), u('6€'), '1_a$', '2_a$', u('3¥')) + (
+            ('6_a$', u('15€')) if Chart == Pie else ()))
diff --git a/pygal/test/test_formatters.py b/pygal/test/test_formatters.py
index 092f9f9..925480c 100644
--- a/pygal/test/test_formatters.py
+++ b/pygal/test/test_formatters.py
@@ -58,7 +58,7 @@ def test_human_readable():
 def test_human_readable_custom():
     """Test human_readable formatter option"""
     f = formatters.HumanReadable()
-    assert f(None) == '∅'
+    assert f(None) == u('∅')
     f = formatters.HumanReadable(none_char='/')
     assert f(None) == '/'