ual( deck3.getRevealElement().querySelectorAll( '.reveal .slides>section>section[data-background="#A7C66B"]' ).length, 1, 'found one vertical slide with data-background="#A0C66B"' );
					assert.strictEqual( deck3.getRevealElement().querySelectorAll( '.reveal .slides>section>section[data-background="#f70000"]' ).length, 1, 'found one vertical slide with data-background="#ff0000"' );
					assert.strictEqual( deck3.getRevealElement().querySelectorAll( '.reveal .slides>section[data-background="#C7916B"]' ).len