diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index ec7e597e871..acfe421ac10 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchurl, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.1-rc8";
-  modDirVersion = "4.1.0-rc8";
-  extraMeta.branch = "4.1";
+  version = "4.2-rc1";
+  modDirVersion = "4.2.0-rc1";
+  extraMeta.branch = "4.2";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v4.x/testing/linux-${version}.tar.xz";
-    sha256 = "0ia4lajpr3w9iivmwm2d7gqrpv97da5g4j8pkqa7q4mlr86jki2w";
+    sha256 = "0a9zr1jf2c110lvd7wi4jxxk2iw6san31yh8hwlahkkb8kh4wliw";
   };
 
   features.iwlwifi = true;