- <button alt="<?php _e( 'Show previous theme' ); ?>" class="left dashicons dashicons-no"></button>
- <button alt="<?php _e( 'Show next theme' ); ?>" class="right dashicons dashicons-no"></button>
- <button alt="<?php _e( 'Close overlay' ); ?>" class="close dashicons dashicons-no"></button>
+ <button class="left dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Show previous theme' ); ?></span></button>
+ <button class="right dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Show next theme' ); ?></span></button>
+ <button class="close dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Close overlay' ); ?></span></button>