diff --git a/src/net/netip/netip_test.go b/src/net/netip/netip_test.go
index 79e1a446d8..4307df38bf 100644
--- a/src/net/netip/netip_test.go
+++ b/src/net/netip/netip_test.go
@@ -788,6 +788,11 @@ func TestAddrWellKnown(t *testing.T) {
 		ip   Addr
 		std  net.IP
 	}{
+		{
+			name: "IPv4 unspecified",
+			ip:   IPv4Unspecified(),
+			std:  net.IPv4zero,
+		},
 		{
 			name: "IPv6 link-local all nodes",
 			ip:   IPv6LinkLocalAllNodes(),