diff --git a/pkgs/servers/nosql/redis/default.nix b/pkgs/servers/nosql/redis/default.nix
index 85e9fe5022e5..2f43e2c402ba 100644
--- a/pkgs/servers/nosql/redis/default.nix
+++ b/pkgs/servers/nosql/redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, lua, pkg-config, nixosTests
+{ lib, stdenv, fetchurl, fetchpatch, lua, pkg-config, nixosTests
 , tcl, which, ps, getconf
 , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
 # dependency ordering is broken at the moment when building with openssl
@@ -14,6 +14,14 @@ stdenv.mkDerivation rec {
     hash = "sha256-93E1wqR8kVHUAov+o7NEcKtNMk0UhPeahMbzKjz7n2U=";
   };
 
+  patches = [
+    # Fix flaky test tests/unit/memefficiency.tcl
+    (fetchpatch {
+      url = "https://github.com/redis/redis/commit/bfe50a30edff6837897964ac3374c082b0d9e5da.patch";
+      sha256 = "sha256-0GMiygbO7LbL1rnuOByOJYE2BKUSI+yy6YH781E2zBw=";
+    })
+  ];
+
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ lua ]