diff --git a/quic/endpoint_test.go b/quic/endpoint_test.go
index 3cba142..dc1c510 100644
--- a/quic/endpoint_test.go
+++ b/quic/endpoint_test.go
@@ -13,6 +13,7 @@
 	"io"
 	"log/slog"
 	"net/netip"
+	"runtime"
 	"testing"
 	"time"
 
@@ -69,6 +70,10 @@
 }
 
 func newLocalConnPair(t testing.TB, conf1, conf2 *Config) (clientConn, serverConn *Conn) {
+	switch runtime.GOOS {
+	case "plan9":
+		t.Skipf("ReadMsgUDP not supported on %s", runtime.GOOS)
+	}
 	t.Helper()
 	ctx := context.Background()
 	e1 := newLocalEndpoint(t, serverSide, conf1)
diff --git a/quic/udp_test.go b/quic/udp_test.go
index d3732c1..5c4ba10 100644
--- a/quic/udp_test.go
+++ b/quic/udp_test.go
@@ -129,6 +129,8 @@
 				if test.srcNet == "udp6" && test.dstNet == "udp" {
 					t.Skipf("%v: no support for mapping IPv4 address to IPv6", runtime.GOOS)
 				}
+			case "plan9":
+				t.Skipf("ReadMsgUDP not supported on %s", runtime.GOOS)
 			}
 			if runtime.GOARCH == "wasm" && test.srcNet == "udp6" {
 				t.Skipf("%v: IPv6 tests fail when using wasm fake net", runtime.GOARCH)