diff --git a/product/ERP5Form/tests/testFields.py b/product/ERP5Form/tests/testFields.py
index 7c6a8b1cef317eec68ce60b846e4f956fc28d3a6..fe1ab3052bba81b24cd4311be0c3e95ea708d344 100644
--- a/product/ERP5Form/tests/testFields.py
+++ b/product/ERP5Form/tests/testFields.py
@@ -158,6 +158,7 @@ class TestFloatField(ERP5TypeTestCase):
     self.field.values['editable'] = 0
     self.assertEquals('10000000000000000000.00',
                       self.field.render(10000000000000000000))
+    self.assertEquals('1e+100', self.field.render(1e+100))
 
   def test_validate_thousand_separator_point(self):
     self.field.values['input_style'] = '-1 234.5'