I noticed this in the logs at https://storage.googleapis.com/origin-ci-test/pr-logs/pull/openshift_cluster-dns-operator/373/pull-ci-openshift-cluster-dns-operator-master-e2e-aws-ovn-operator/1704287854600916992/build-log.txt:

=== RUN   TestCoreDNSDaemonSetReconciliation
[controller-runtime] log.SetLogger(...) was never called, logs will not be displayed:
goroutine 205 [running]:
runtime/debug.Stack()
	/usr/lib/golang/src/runtime/debug/stack.go:24 +0x65
sigs.k8s.io/controller-runtime/pkg/log.eventuallyFulfillRoot()
	/go/src/github.com/openshift/cluster-dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/log/log.go:59 +0xbd
sigs.k8s.io/controller-runtime/pkg/log.(*delegatingLogSink).WithName(0xc000061340, {0x182213b, 0x14})
	/go/src/github.com/openshift/cluster-dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/log/deleg.go:147 +0x4c
github.com/go-logr/logr.Logger.WithName({{0x1aa8468, 0xc000061340}, 0x0}, {0x182213b?, 0x0?})
	/go/src/github.com/openshift/cluster-dns-operator/vendor/github.com/go-logr/logr/logr.go:336 +0x46
sigs.k8s.io/controller-runtime/pkg/client.newClient(0xc000789200, {0x0, 0xc0001a7730, {0x1aa9d90, 0xc00011c700}, 0x0, {0x0, 0x0}, 0x0})
	/go/src/github.com/openshift/cluster-dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/client/client.go:115 +0xb4
sigs.k8s.io/controller-runtime/pkg/client.New(0xc000789200?, {0x0, 0xc0001a7730, {0x1aa9d90, 0xc00011c700}, 0x0, {0x0, 0x0}, 0x0})
	/go/src/github.com/openshift/cluster-dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/client/client.go:101 +0x85
github.com/openshift/cluster-dns-operator/pkg/operator/client.NewClient(0x0?)
	/go/src/github.com/openshift/cluster-dns-operator/pkg/operator/client/client.go:52 +0x145
github.com/openshift/cluster-dns-operator/test/e2e.getClient()
	/go/src/github.com/openshift/cluster-dns-operator/test/e2e/utils.go:451 +0x77
github.com/openshift/cluster-dns-operator/test/e2e.TestCoreDNSDaemonSetReconciliation(0xc000501520)
	/go/src/github.com/openshift/cluster-dns-operator/test/e2e/operator_test.go:330 +0x45
testing.tRunner(0xc000501520, 0x193c038)
	/usr/lib/golang/src/testing/testing.go:1576 +0x10b
created by testing.(*T).Run
	/usr/lib/golang/src/testing/testing.go:1629 +0x3ea
    operator_test.go:374: found "foo" node selector on daemonset openshift-dns/dns-default: <nil>
    operator_test.go:378: observed absence of "foo" node selector on daemonset openshift-dns/dns-default: <nil>
--- PASS: TestCoreDNSDaemonSetReconciliation (1.63s)

4.15 and earlier

Be unlucky in CI testing

1.
2.
3.

Stack trace and prints a <nil>
 operator_test.go:374: found "foo" node selector on daemonset openshift-dns/dns-default: <nil>
    operator_test.go:378: observed absence of "foo" node selector on daemonset openshift-dns/dns-default: <nil>

No stack trace and no print of <nil>