diff --git a/bin/cancel_expired_customers b/bin/cancel_expired_customers
index 9d61d45d006f07eedfe625e21801c53738043c40..8d1842776ee9f4dd75fc65a4be51dc91789797e1 100755
--- a/bin/cancel_expired_customers
+++ b/bin/cancel_expired_customers
@@ -77,6 +77,8 @@ EM.schedule do
 				end
 				page = page.next
 			end
+			raise "ported_in looks wrong" if tns.length < 250
+
 			ported_in_promise.fulfill(tns)
 		rescue StandardError
 			ported_in_promise.reject($!)