TestDispatchArgDefaultBuiltins fails on Debian arm64, armhf

[siretart]

On arm64: https://buildd.debian.org/status/fetch.php?pkg=golang-github-openshift-imagebuilder&arch=arm64&ver=1.2.19%2Bds1-1&stamp=1763840621&raw=0

=== RUN   TestDispatchArgDefaultBuiltins
    dispatchers_test.go:34: Expected [BUILDARCH=arm TARGETPLATFORM=linux/arm/v8], got [BUILDARCH=arm TARGETPLATFORM=linux/arm]
--- FAIL: TestDispatchArgDefaultBuiltins (0.00s)

On armhf:
https://buildd.debian.org/status/fetch.php?pkg=golang-github-openshift-imagebuilder&arch=armhf&ver=1.2.19%2Bds1-1&stamp=1763840665&raw=0

=== RUN   TestDispatchArgDefaultBuiltins
    dispatchers_test.go:34: Expected [BUILDARCH=arm TARGETPLATFORM=linux/arm/v8], got [BUILDARCH=arm TARGETPLATFORM=linux/arm]
--- FAIL: TestDispatchArgDefaultBuiltins (0.00s)

Test code is here:

imagebuilder/dispatchers_test.go

Lines 16 to 36 in f008840

	func TestDispatchArgDefaultBuiltins(t *testing.T) {
	mybuilder := NewBuilder(make(map[string]string))
	args := []string{"TARGETPLATFORM"}
	if err := arg(mybuilder, args, nil, nil, "", nil); err != nil {
	t.Errorf("arg error: %v", err)
	}
	args = []string{"BUILDARCH"}
	if err := arg(mybuilder, args, nil, nil, "", nil); err != nil {
	t.Errorf("arg(2) error: %v", err)
	}
	localspec := platforms.DefaultSpec()
	expectedArgs := []string{
	"BUILDARCH=" + localspec.Architecture,
	"TARGETPLATFORM=" + localspec.OS + "/" + localspec.Architecture,
	}
	got := mybuilder.Arguments()
	sort.Strings(got)
	if !reflect.DeepEqual(got, expectedArgs) {
	t.Errorf("Expected %v, got %v\n", expectedArgs, got)
	}
	}

What's broken here?

[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[openshift-bot]

Stale issues rot after 30d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle rotten
/remove-lifecycle stale