diff --git a/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
index 40a589c..ba0e6a7 100644
--- a/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php
@@ -59,7 +59,7 @@ public function minimumVersion() {
   protected function connect() {
     try {
       // This doesn't actually test the connection.
-      db_set_active();
+      \Drupal\Core\Database\Database::setActiveConnection();
       // Now actually do a check.
       try {
         Database::getConnection();
diff --git a/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
index 77e0a47..c5090b1 100644
--- a/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php
@@ -58,7 +58,7 @@ public function minimumVersion() {
   protected function connect() {
     try {
       // This doesn't actually test the connection.
-      db_set_active();
+      \Drupal\Core\Database\Database::setActiveConnection();
       // Now actually do a check.
       Database::getConnection();
       $this->pass('Drupal can CONNECT to the database ok.');
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
index f56b26c..72e03e6 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Install/Tasks.php
@@ -54,7 +54,7 @@ public function getFormOptions(array $database) {
   protected function connect() {
     try {
       // This doesn't actually test the connection.
-      db_set_active();
+      \Drupal\Core\Database\Database::setActiveConnection();
       // Now actually do a check.
       Database::getConnection();
       $this->pass('Drupal can CONNECT to the database ok.');
diff --git a/core/lib/Drupal/Core/Database/Install/Tasks.php b/core/lib/Drupal/Core/Database/Install/Tasks.php
index 2819615..45644de 100644
--- a/core/lib/Drupal/Core/Database/Install/Tasks.php
+++ b/core/lib/Drupal/Core/Database/Install/Tasks.php
@@ -156,7 +156,7 @@ public function runTasks() {
   protected function connect() {
     try {
       // This doesn't actually test the connection.
-      db_set_active();
+      \Drupal\Core\Database\Database::setActiveConnection();
       // Now actually do a check.
       Database::getConnection();
       $this->pass('Drupal can CONNECT to the database ok.');