diff --git a/unix/syscall_freebsd_test.go b/unix/syscall_freebsd_test.go
index cd13080a..3c3d8258 100644
--- a/unix/syscall_freebsd_test.go
+++ b/unix/syscall_freebsd_test.go
@@ -7,18 +7,14 @@
 package unix_test
 
 import (
-	"os"
 	"testing"
 
 	"golang.org/x/sys/unix"
 )
 
-func TestSysctUint64(t *testing.T) {
-	_, err := unix.SysctlUint64("vm.max_kernel_address")
+func TestSysctlUint64(t *testing.T) {
+	_, err := unix.SysctlUint64("security.mac.labeled")
 	if err != nil {
-		if os.Getenv("GO_BUILDER_NAME") == "freebsd-386-gce101" {
-			t.Skipf("Ignoring known failing test (golang.org/issue/15186). Failed with: %v", err)
-		}
 		t.Fatal(err)
 	}
 }