diff --git a/src/net/dial_test.go b/src/net/dial_test.go
index 9fe507e901f..8b21e6b0886 100644
--- a/src/net/dial_test.go
+++ b/src/net/dial_test.go
@@ -695,6 +695,11 @@ func TestDialerLocalAddr(t *testing.T) {
 }
 
 func TestDialerDualStack(t *testing.T) {
+	// This test is known to be flaky. Don't frighten regular
+	// users about it; only fail on the build dashboard.
+	if testenv.Builder() == "" {
+		testenv.SkipFlaky(t, 13324)
+	}
 	if !supportsIPv4 || !supportsIPv6 {
 		t.Skip("both IPv4 and IPv6 are required")
 	}