authMode: []string{kubeadmconstants.ModeNode, kubeadmconstants.ModeRBAC},
			expected: "Node,RBAC",
		},
		{
			name:     "single unspecified returning default",
			authMode: []string{"FooAuthzMode"},
			expected: "Node,RBAC",
		},
		{
			name:     "multiple ignored",
			authMode: []string{kubeadmconstants.ModeNode, "foo", kubeadmconstants.ModeRBAC, "bar"},
			expected: "Node,RBAC",
		},