diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go
index 85cae90..94b4edd 100644
--- a/src/cmd/go/go_test.go
+++ b/src/cmd/go/go_test.go
@@ -4946,6 +4946,8 @@ func TestBuildmodePIE(t *testing.T) {
 }
 
 func TestExecBuildX(t *testing.T) {
+	t.Skipf("skipping, test requires networking")
+
 	tooSlow(t)
 	if !canCgo {
 		t.Skip("skipping because cgo not enabled")
diff --git a/src/net/dial_test.go b/src/net/dial_test.go
index 00a84d1..27f9ec9 100644
--- a/src/net/dial_test.go
+++ b/src/net/dial_test.go
@@ -968,6 +968,8 @@ func TestDialerControl(t *testing.T) {
 // mustHaveExternalNetwork is like testenv.MustHaveExternalNetwork
 // except that it won't skip testing on non-iOS builders.
 func mustHaveExternalNetwork(t *testing.T) {
+	t.Skipf("Nix sandbox does not have networking")
+
 	t.Helper()
 	ios := runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64")
 	if testenv.Builder() == "" || ios {