diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 00dcb6f0f48..6e3abb792bd 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -3,15 +3,15 @@
 with stdenv.lib;
 
 buildLinux (args // rec {
-  version = "5.5-rc7";
-  extraMeta.branch = "5.5";
+  version = "5.6-rc1";
+  extraMeta.branch = "5.6";
 
   # modDirVersion needs to be x.y.z, will always add .0
   modDirVersion = if (modDirVersionArg == null) then builtins.replaceStrings ["-"] [".0-"] version else modDirVersionArg;
 
   src = fetchurl {
     url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-    sha256 = "10fjk4bw73x5xpb4q83ngni7slw489wdxhdwmyrkfqqy5chgm290";
+    sha256 = "1ir7mdzxrin7k6a7ldfmpl9bbapkr99l3pd07dv8589vcrd43zlh";
   };
 
   # Should the testing kernels ever be built on Hydra?