diff --git a/src/net/lookup_test.go b/src/net/lookup_test.go
index 4a9f6c664d045..e3bf114a8e2cc 100644
--- a/src/net/lookup_test.go
+++ b/src/net/lookup_test.go
@@ -306,6 +306,9 @@ func TestLookupGoogleHost(t *testing.T) {
 }
 
 func TestLookupLongTXT(t *testing.T) {
+	if runtime.GOOS == "plan9" {
+		t.Skip("skipping on plan9; see https://golang.org/issue/22857")
+	}
 	if testenv.Builder() == "" {
 		testenv.MustHaveExternalNetwork(t)
 	}