public function test_build_time_query_minute_second() {
    global $wpdb;
    $q = new WP_Date_Query( array() );

    $found = $q->build_time_query( 'post_date', '=', null, 15, 35 );

    // $compare value is floating point - use regex to account for
    // varying precision on different PHP installations
    $this->assertRegExp( "/DATE_FORMAT\( post_date, '0\.%i%s' \) = 0\.15350*/", $wpdb->remove_placeholder_escape( $found ) );
  }