diff --git a/nixos/tests/installed-tests/ibus.nix b/nixos/tests/installed-tests/ibus.nix
index a4bc2a7d7de0..028c20c29f2d 100644
--- a/nixos/tests/installed-tests/ibus.nix
+++ b/nixos/tests/installed-tests/ibus.nix
@@ -4,6 +4,7 @@ makeInstalledTest {
   tested = pkgs.ibus;
 
   testConfig = {
+    i18n.supportedLocales = [ "all" ];
     i18n.inputMethod.enabled = "ibus";
     systemd.user.services.ibus-daemon = {
       serviceConfig.ExecStart = "${pkgs.ibus}/bin/ibus-daemon --xim --verbose";
diff --git a/pkgs/tools/inputmethods/ibus/default.nix b/pkgs/tools/inputmethods/ibus/default.nix
index c25340e38350..c73598fd6ca1 100644
--- a/pkgs/tools/inputmethods/ibus/default.nix
+++ b/pkgs/tools/inputmethods/ibus/default.nix
@@ -1,7 +1,5 @@
 { lib, stdenv
 , substituteAll
-, fetchurl
-, fetchpatch
 , fetchFromGitHub
 , autoreconfHook
 , gettext
@@ -60,22 +58,16 @@ in
 
 stdenv.mkDerivation rec {
   pname = "ibus";
-  version = "1.5.26";
+  version = "1.5.27";
 
   src = fetchFromGitHub {
     owner = "ibus";
     repo = "ibus";
     rev = version;
-    sha256 = "7Vuj4Gyd+dLUoCkR4SPkfGPwVQPRo2pHk0pRAsmtjxc=";
+    sha256 = "sha256-DwX7SYRb18C0Lz2ySPS3yV99Q1xQezs0Ls2P7Rbtk5Q=";
   };
 
   patches = [
-    # Fixes systemd unit installation path https://github.com/ibus/ibus/pull/2388
-    (fetchpatch {
-      url = "https://github.com/ibus/ibus/commit/33b4b3932bfea476a841f8df99e20049b83f4b0e.patch";
-      sha256 = "kh8SBR+cqsov/B0A2YXLJVq1F171qoSRUKbBPHjPRHI=";
-    })
-
     (substituteAll {
       src = ./fix-paths.patch;
       pythonInterpreter = python3Runtime.interpreter;