From 08c8d32471031b704f40832594c5fc8fba4f9db9 Mon Sep 17 00:00:00 2001
From: nickajacks1 <128185314+nickajacks1@users.noreply.github.com>
Date: Fri, 5 Jan 2024 21:35:20 -0800
Subject: [PATCH] test(expvarhandler): fix failure when using -count to run
 more than once (#1688)

---
 expvarhandler/expvar_test.go | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/expvarhandler/expvar_test.go b/expvarhandler/expvar_test.go
index e6114d7ffb..6fa1d0d9e7 100644
--- a/expvarhandler/expvar_test.go
+++ b/expvarhandler/expvar_test.go
@@ -4,17 +4,24 @@ import (
 	"encoding/json"
 	"expvar"
 	"strings"
+	"sync"
 	"testing"
 
 	"github.com/valyala/fasthttp"
 )
 
+var once sync.Once
+
 func TestExpvarHandlerBasic(t *testing.T) {
 	t.Parallel()
 
-	expvar.Publish("customVar", expvar.Func(func() any {
-		return "foobar"
-	}))
+	// Publish panics if the same var is published more than once,
+	// which can happen if the test is run with -count
+	once.Do(func() {
+		expvar.Publish("customVar", expvar.Func(func() any {
+			return "foobar"
+		}))
+	})
 
 	var ctx fasthttp.RequestCtx