diff --git tests/phpunit/includes/install.php tests/phpunit/includes/install.php
index 63de9d2..b9480bc 100644
--- tests/phpunit/includes/install.php
+++ tests/phpunit/includes/install.php
@@ -22,17 +22,6 @@ require_once ABSPATH . '/wp-settings.php';
 require_once ABSPATH . '/wp-admin/includes/upgrade.php';
 require_once ABSPATH . '/wp-includes/wp-db.php';
 
-define( 'WP_TESTS_VERSION_FILE', ABSPATH . '.wp-tests-version' );
-
-$wpdb->suppress_errors();
-$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
-$wpdb->suppress_errors( false );
-
-$hash = get_option( 'db_version' ) . ' ' . (int) $multisite . ' ' . sha1_file( $config_file_path );
-
-if ( $installed && file_exists( WP_TESTS_VERSION_FILE ) && file_get_contents( WP_TESTS_VERSION_FILE ) == $hash )
-	return;
-
 $wpdb->query( 'SET storage_engine = INNODB' );
 $wpdb->select( DB_NAME, $wpdb->dbh );
 
@@ -63,5 +52,3 @@ if ( $multisite ) {
 	install_network();
 	populate_network( 1, WP_TESTS_DOMAIN, WP_TESTS_EMAIL, $title, '/', $subdomain_install );
 }
-
-file_put_contents( WP_TESTS_VERSION_FILE, $hash );