diff --git a/.golangci.yml b/.golangci.yml
index 96a738624ce..4ce0db6f07b 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -268,7 +268,7 @@ linters:
     - tagliatelle
     - tenv
     - testableexamples
-    # - testpackage # TODO: Enable once https://github.com/gofiber/fiber/issues/2252 is implemente
+    # - testpackage # TODO: Enable once https://github.com/gofiber/fiber/issues/2252 is implemented
     - thelper
     - tparallel
     - typecheck
diff --git a/helpers.go b/helpers.go
index 47f4e906dc0..54c281cf4c8 100644
--- a/helpers.go
+++ b/helpers.go
@@ -26,7 +26,7 @@ import (
 	"github.com/valyala/fasthttp"
 )
 
-// Guards overwrites to os.Stdout and Os.Stderr
+// Guards overwrites to os.Stdout and os.Stderr
 var osStdVarMu sync.RWMutex
 
 // getTLSConfig returns a net listener's tls config
diff --git a/middleware/idempotency/response.go b/middleware/idempotency/response.go
index 94cec73ae4b..ca06bcb452f 100644
--- a/middleware/idempotency/response.go
+++ b/middleware/idempotency/response.go
@@ -1,5 +1,6 @@
 package idempotency
 
+//go:generate msgp -o=response_msgp.go -io=false -unexported
 type response struct {
 	StatusCode int `msg:"sc"`
 
diff --git a/prefork_test.go b/prefork_test.go
index 8ef53470671..82d5e34db8a 100644
--- a/prefork_test.go
+++ b/prefork_test.go
@@ -19,10 +19,7 @@ func Test_App_Prefork_Child_Process(t *testing.T) {
 	// Reset test var
 	testPreforkMaster = true
 
-	utils.AssertEqual(t, nil, os.Setenv(envPreforkChildKey, envPreforkChildVal))
-	t.Cleanup(func() {
-		utils.AssertEqual(t, nil, os.Setenv(envPreforkChildKey, ""))
-	})
+	t.Setenv(envPreforkChildKey, envPreforkChildVal)
 
 	app := New()
 
@@ -74,13 +71,9 @@ func Test_App_Prefork_Master_Process(t *testing.T) {
 	dummyChildCmd.Store("")
 }
 
+//nolint:paralleltest // Test is using t.Setenv which can't be run in parallel
 func Test_App_Prefork_Child_Process_Never_Show_Startup_Message(t *testing.T) {
-	t.Parallel()
-
-	utils.AssertEqual(t, nil, os.Setenv(envPreforkChildKey, envPreforkChildVal))
-	t.Cleanup(func() {
-		utils.AssertEqual(t, nil, os.Setenv(envPreforkChildKey, ""))
-	})
+	t.Setenv(envPreforkChildKey, envPreforkChildVal)
 
 	rescueStdout := os.Stdout
 	defer func() { os.Stdout = rescueStdout }() //nolint:reassign // Must do this inside the test