From 66a3180ec31bca52bb6ee83b09324c823b7291a4 Mon Sep 17 00:00:00 2001
From: Lucas Bajolet <lucas.bajolet@hashicorp.com>
Date: Wed, 15 May 2024 21:34:15 +0000
Subject: [PATCH] backport of commit 60d46ec14643a93c9850eca3f862151cc6828772

---
 packer_test/commands_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packer_test/commands_test.go b/packer_test/commands_test.go
index a49f289d8..8f6beb7e5 100644
--- a/packer_test/commands_test.go
+++ b/packer_test/commands_test.go
@@ -2,6 +2,7 @@ package packer_test
 
 import (
 	"fmt"
+	"os"
 	"os/exec"
 	"strings"
 	"sync"
@@ -29,6 +30,16 @@ func (ts *PackerTestSuite) PackerCommand() *packerCommand {
 		packerPath: ts.packerPath,
 		env: map[string]string{
 			"PACKER_LOG": "1",
+			// Required for Windows, otherwise since we overwrite all
+			// the envvars for the test and Go relies on that envvar
+			// being set in order to return another path than
+			// C:\Windows by default
+			//
+			// If we don't have it, Packer immediately errors upon
+			// invocation as the temporary logfile that we write in
+			// case of Panic will fail to be created (unless tests
+			// are running as Administrator, but please don't).
+			"TMP": os.TempDir(),
 		},
 		stderr: stderr,
 		stdout: stdout,