mangled string
	}{
		{
			env:     "v1",
			mangled: "p___",
		},
		{
			env:     "v2",
			mangled: "p..u00e4..u4e16..U0001f703",
		},
		{
			env:     "v3",
			mangled: "p_u00e4_u4e16_U0001f703",
		},
		{
			env:  "error",
			fail: true,
		},
	}

	cmd := os.Args[0]
	tmpdir := t.TempDir()

	defer os.Unsetenv(testEnvName)

	for _, test := range tests {