diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 0c498c5d8285..b089e962397d 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -238,7 +238,7 @@ with stdenv.lib;
   SLIP_COMPRESSED y # CSLIP compressed headers
   SLIP_SMART y
   THERMAL_HWMON y # Hardware monitoring support
-  USB_DEBUG n
+  USB_DEBUG? n
   USB_EHCI_ROOT_HUB_TT y # Root Hub Transaction Translators
   USB_EHCI_TT_NEWSCHED y # Improved transaction translator scheduling
   X86_CHECK_BIOS_CORRUPTION y
diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index d58610a38cda..541384a8c118 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,12 +1,14 @@
 { stdenv, fetchurl, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "3.15-rc8";
-  extraMeta.branch = "3.15";
+  # Reason to add:  RTL8192EE
+  version = "3.16-rc1";
+  modDirVersion = "3.16.0-rc1";
+  extraMeta.branch = "3.16";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v3.x/testing/linux-${version}.tar.xz";
-    sha256 = "";
+    sha256 = "1y2ssifw6db40mr4j6k9c0kjwb4ssrrps74pc38krq4d6yzinhmq";
   };
 
   features.iwlwifi = true;
@@ -14,4 +16,8 @@ import ./generic.nix (args // rec {
   features.needsCifsUtils = true;
   features.canDisableNetfilterConntrackHelpers = true;
   features.netfilterRPFilter = true;
+
+  # Should the testing kernels ever be built on Hydra?
+  extraMeta.hydraPlatforms = [];
+
 } // (args.argsOverride or {}))