Include Category With Tax Query

I’m using The Events Calendar plugin but I thought I’d post it here as I believe this particular function works the same as get_posts().

I’m trying to use the function to display only posts from one particular category (‘Lead Event’):

<?php

	$args = array( 'posts_per_page' => 5,
				   'eventDisplay' => 'all',
				   'tax_query', array(
					   	array(
					   		'taxonomy' => 'event-type',
					   		'field' => 'slug',
					   		'terms' => 'lead-event'
					   )
			       ),
	);

	$events = tribe_get_events( $args );

?>

But it’s just returning 5 posts, regardless of which category they’re in

I’ve also tried with the IN operator but still no luck:

<?php
	$args = array( 'posts_per_page' => 5,
				   'eventDisplay' => 'all',
				   'tax_query', array(
					   	array(
					   		'taxonomy' => 'event-type',
					   		'field' => 'slug',
					   		'terms' => 'lead-event',
					   		'operator' => 'IN'
					   )
			       ),
	);

	$events = tribe_get_events( $args );

?>

Can anyone see what I’m doing wrong?