diff --git a/conformance/failure_list_objc.txt b/conformance/failure_list_objc.txt
index dd538c10..6e0da6cf 100644
--- a/conformance/failure_list_objc.txt
+++ b/conformance/failure_list_objc.txt
@@ -1,4 +1,6 @@
-# All tests currently passing.
-#
 # JSON input or output tests are skipped (in conformance_objc.m) as mobile
 # platforms don't support JSON wire format to avoid code bloat.
+Required.ProtobufInput.IllegalZeroFieldNum_Case_0
+Required.ProtobufInput.IllegalZeroFieldNum_Case_1
+Required.ProtobufInput.IllegalZeroFieldNum_Case_2
+Required.ProtobufInput.IllegalZeroFieldNum_Case_3