diff --git a/cmd/hakurei/json_test.go b/cmd/hakurei/json_test.go
index c6649567..433a514b 100644
--- a/cmd/hakurei/json_test.go
+++ b/cmd/hakurei/json_test.go
@@ -66,7 +66,7 @@ func TestEncodeJSON(t *testing.T) {
 		want string
 	}{
 		{"marshaler", errorJSONMarshaler{},
-			`cannot encode json for main.errorJSONMarshaler: unique error 3735928559 injected by the test suite`},
+			`cannot encode json for *main.errorJSONMarshaler: unique error 3735928559 injected by the test suite`},
 		{"default", func() {},
 			`cannot write json: json: unsupported type: func()`},
 	}
diff --git a/go.mod b/go.mod
index 6457cffa..7514bcba 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module hakurei.app
 
-go 1.26
+go 1.27
diff --git a/internal/report/report_test.go b/internal/report/report_test.go
index 6c7a4046..15abf13e 100644
--- a/internal/report/report_test.go
+++ b/internal/report/report_test.go
@@ -55,7 +55,7 @@ func TestDispatch(t *testing.T) {
 				}),
 			},
 		}, true, []string{`{"kind":"fatal","message":"rejecting coldboot loop","error":"unique error 51966 injected by the test suite"}
-`, `{"kind":"inconsistent","message":"processed inconsistent uevent","error":{"fault":1,"event":{"action":"add","devpath":"\u0000","env":{"V":"\ufffd"},"seqnum":2,"subsystem":""},"object":{"state":1,"devpath":"\u0000","subsystem":"","env":{"V":"\ufffd"}}}}
+`, `{"kind":"inconsistent","message":"processed inconsistent uevent","error":{"fault":1,"event":{"action":"add","devpath":"\u0000","env":{"V":"` + "\ufffd" + `"},"seqnum":2,"subsystem":""},"object":{"state":1,"devpath":"\u0000","subsystem":"","env":{"V":"` + "\ufffd" + `"}}}}
 `}, `dispatch: rejecting coldboot loop: unique error 51966 injected by the test suite
 dispatch: processed inconsistent uevent: duplicate add event on devpath "\x00"
 `, nil},
diff --git a/test/flake.lock b/test/flake.lock
index ce9fe45f..5537506a 100644
--- a/test/flake.lock
+++ b/test/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1780361225,
-        "narHash": "sha256-wnV9ttf4fPWNonBIQmvlrSlNpQYgx5HgWWd007mwIFA=",
+        "lastModified": 1787146702,
+        "narHash": "sha256-YbRcLdU/yK4gWsQg7V8WTKZHfXL33g8+wSFUX3wyevs=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "e28654b71096e08c019d4861ca26acb646f583d8",
+        "rev": "173b7e8d40fdc8c296a9c99854314f17a3a1704c",
         "type": "github"
       },
       "original": {
@@ -23,11 +23,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1780453794,
-        "narHash": "sha256-bXMRa9VTsHSPXL4Cw8R6JJLQeY3Y/IP4+YJCYVmQ7FY=",
+        "lastModified": 1787101114,
+        "narHash": "sha256-gwrPcFf/rDjHPaVflbDZ040ZDmBTRj/7+s8ZmE2SaIM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6b316287bae2ee04c9b93c8c858d930fd07d7338",
+        "rev": "b18a4b905f8d028dc4476412e6d6891728695379",
         "type": "github"
       },
       "original": {
diff --git a/test/flake.nix b/test/flake.nix
index 6c8cf100..01a07f78 100644
--- a/test/flake.nix
+++ b/test/flake.nix
@@ -99,7 +99,7 @@
           hakurei = pkgs.pkgsStatic.callPackage ./package.nix {
             inherit (pkgs)
               # passthru.buildInputs
-              go_1_26
+              go_1_27
               clang
 
               # nativeBuildInputs
@@ -180,7 +180,7 @@
                         let
                           # this is used for interactive vm testing during development, where tests might be broken
                           package = self.packages.${pkgs.stdenv.hostPlatform.system}.hakurei.override {
-                            buildGo126Module = previousArgs: pkgs.pkgsStatic.buildGo126Module (previousArgs // { doCheck = false; });
+                            buildGo127Module = previousArgs: pkgs.pkgsStatic.buildGo127Module (previousArgs // { doCheck = false; });
                           };
                         in
                         {
diff --git a/test/package.nix b/test/package.nix
index 46567b69..e68420e3 100644
--- a/test/package.nix
+++ b/test/package.nix
@@ -1,7 +1,7 @@
 {
   lib,
   stdenv,
-  buildGo126Module,
+  buildGo127Module,
   makeBinaryWrapper,
   xdg-dbus-proxy,
   pkg-config,
@@ -20,7 +20,7 @@
   fuse3,
 
   # for passthru.buildInputs
-  go_1_26,
+  go_1_27,
   clang,
   xorgproto,
 
@@ -32,7 +32,7 @@
   withStatic ? stdenv.hostPlatform.isStatic,
 }:
 
-buildGo126Module rec {
+buildGo127Module rec {
   pname = "hakurei";
   version = with lib.strings; removePrefix "v" (trim (builtins.readFile ../cmd/dist/VERSION));
 
@@ -55,7 +55,7 @@ buildGo126Module rec {
     ];
 
     nativeBuildInputs = [
-      go_1_26
+      go_1_27
       pkg-config
       wayland-scanner
     ];
@@ -126,10 +126,10 @@ buildGo126Module rec {
     '';
 
   passthru = {
-    go = go_1_26;
+    go = go_1_27;
 
     targetPkgs = [
-      go_1_26
+      go_1_27
       clang
       xorgproto
       util-linux