diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 3fe9ff8e2870..7268ed30eff0 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,13 +1,13 @@
 { stdenv, hostPlatform, fetchurl, perl, buildLinux, libelf, utillinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.15-rc1";
-  modDirVersion = "4.15.0-rc1";
+  version = "4.15-rc2";
+  modDirVersion = "4.15.0-rc2";
   extraMeta.branch = "4.15";
 
   src = fetchurl {
     url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-    sha256 = "1l7c132qb5qjd80hga03ivssfq65brqyd95sb4rd065dqrixp20n";
+    sha256 = "1i79gkjipj1q7w0d4zjz2hj43r12jicgznxk0wz0la2d8a4d3lcq";
   };
 
   # Should the testing kernels ever be built on Hydra?