diff --git a/frappe/custom/doctype/customize_form/test_customize_form.py b/frappe/custom/doctype/customize_form/test_customize_form.py
index aef95cd676..6783e52d68 100644
--- a/frappe/custom/doctype/customize_form/test_customize_form.py
+++ b/frappe/custom/doctype/customize_form/test_customize_form.py
@@ -188,6 +188,19 @@ class TestCustomizeForm(unittest.TestCase):
 	def test_core_doctype_customization(self):
 		self.assertRaises(frappe.ValidationError, self.get_customize_form, 'User')
 
+	def test_save_customization_length_field_property(self):
+		# Using Notification Log doctype as it doesn't have any other custom fields
+		d = self.get_customize_form("Notification Log")
+
+		document_name = d.get("fields", {"fieldname": "document_name"})[0]
+		document_name.length = 255
+		d.run_method("save_customization")
+
+		self.assertEqual(frappe.db.get_value("Property Setter",
+			{"doc_type": "Notification Log", "property": "length", "field_name": "document_name"}, "value"), '255')
+
+		self.assertTrue(d.flags.update_db)
+
 	def test_custom_link(self):
 		try:
 			# create a dummy doctype linked to Event