diff --git a/tests/conftest.py b/tests/conftest.py
index 9dc9302..15dc699 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -145,7 +145,7 @@ for i in range(50):
         formdata.data['4_display'] = "open'three"
         formdata.data['9'] = 'a'
         formdata.data['10'] = 'b'
-        formdata.data['8'] = ''
+        formdata.data['8'] = '11111111111111111111111'
 
     formdata.data['3'] = bool(i % 2)
     if i%3 == 0: