diff --git a/includes/Checker/Runtime_Environment_Setup.php b/includes/Checker/Runtime_Environment_Setup.php
index b5ebb5be..6dd6b8bf 100644
--- a/includes/Checker/Runtime_Environment_Setup.php
+++ b/includes/Checker/Runtime_Environment_Setup.php
@@ -20,11 +20,11 @@ final class Runtime_Environment_Setup {
 	 * @since 1.0.0
 	 *
 	 * @global wpdb               $wpdb          WordPress database abstraction object.
-	 * @global string             $table_prefix  The database table prefix.
+	 * @global string             $base_prefix  The database table prefix.
 	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
 	 */
 	public function set_up() {
-		global $wpdb, $table_prefix, $wp_filesystem;
+		global $wpdb, $base_prefix, $wp_filesystem;
 
 		require_once ABSPATH . '/wp-admin/includes/upgrade.php';
 
@@ -41,7 +41,7 @@ public function set_up() {
 		$permalink_structure = get_option( 'permalink_structure' );
 
 		// Set the new prefix.
-		$old_prefix = $wpdb->set_prefix( $table_prefix . 'pc_' );
+		$old_prefix = $wpdb->set_prefix( $base_prefix . 'pc_' );
 
 		// Create and populate the test database tables if they do not exist.
 		if ( $wpdb->posts !== $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->posts ) ) ) {
@@ -98,7 +98,7 @@ static function () use ( $permalink_structure ) {
 	 * @since 1.0.0
 	 *
 	 * @global wpdb               $wpdb          WordPress database abstraction object.
-	 * @global string             $table_prefix  The database table prefix.
+	 * @global string             $base_prefix  The database table prefix.
 	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
 	 */
 	public function clean_up() {
@@ -146,19 +146,19 @@ public function clean_up() {
 	 * @since 1.3.0
 	 *
 	 * @global wpdb   $wpdb         WordPress database abstraction object.
-	 * @global string $table_prefix The database table prefix.
+	 * @global string $base_prefix The database table prefix.
 	 *
 	 * @return bool True if the runtime environment is set up, false if not.
 	 */
 	public function is_set_up() {
-		global $wpdb, $table_prefix;
+		global $wpdb, $base_prefix;
 
 		if ( defined( 'WP_PLUGIN_CHECK_OBJECT_CACHE_DROPIN_VERSION' ) ) {
 			return true;
 		}
 
 		// Set the custom prefix to check for the runtime environment tables.
-		$old_prefix = $wpdb->set_prefix( $table_prefix . 'pc_' );
+		$old_prefix = $wpdb->set_prefix( $base_prefix . 'pc_' );
 
 		$tables_present = $wpdb->posts === $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->posts ) );