diff --git a/pkg/types/types_test.go b/pkg/types/types_test.go
index fc58231bb..e3f847c06 100644
--- a/pkg/types/types_test.go
+++ b/pkg/types/types_test.go
@@ -76,6 +76,7 @@ func TestTime3339_empty(t *testing.T) {
 		{enc: "null", z: true},
 		{enc: `""`, z: true},
 		{enc: "0000-00-00T00:00:00Z", z: true},
+		{enc: "0001-01-01T00:00:00Z", z: true},
 		{enc: "1970-01-01T00:00:00Z", z: true},
 		{enc: "2001-02-03T04:05:06Z", z: false},
 		{enc: "2001-02-03T04:05:06+06:00", z: false},