diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 36aafe9a4a21..0c4158790bdc 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,13 +1,13 @@
 { stdenv, buildPackages, fetchurl, perl, buildLinux, libelf, utillinux, ... } @ args:
 
 buildLinux (args // rec {
-  version = "4.20-rc3";
-  modDirVersion = "4.20.0-rc3";
+  version = "4.20-rc4";
+  modDirVersion = "4.20.0-rc4";
   extraMeta.branch = "4.20";
 
   src = fetchurl {
     url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-    sha256 = "0iin34alr5ax15pvilhdn5pifqav4gkxalb7vqb8zvxnhsm6kk58";
+    sha256 = "0kni1l1gk9mva7ym091mrkn9f2bdbh80i7589ahk6j5blpj9m3ns";
   };
 
   # Should the testing kernels ever be built on Hydra?