diff --git a/src/runtime/runtime-gdb_test.go b/src/runtime/runtime-gdb_test.go
index 79b4621614..5dbe4bf88a 100644
--- a/src/runtime/runtime-gdb_test.go
+++ b/src/runtime/runtime-gdb_test.go
@@ -41,6 +41,8 @@ func checkGdbEnvironment(t *testing.T) {
 		if testing.Short() {
 			t.Skip("skipping gdb tests on AIX; see https://golang.org/issue/35710")
 		}
+	case "plan9":
+		t.Skip("there is no gdb on Plan 9")
 	}
 	if final := os.Getenv("GOROOT_FINAL"); final != "" && runtime.GOROOT() != final {
 		t.Skip("gdb test can fail with GOROOT_FINAL pending")