diff --git a/includes/install.mysqli.inc b/includes/install.mysqli.inc
index 0db8ce967ea..e1b5d34a660 100644
--- a/includes/install.mysqli.inc
+++ b/includes/install.mysqli.inc
@@ -47,7 +47,7 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test selecting the database.
   if (mysqli_connect_errno() > 0) {
-    drupal_set_message(st('We were able to connect to the MySQL database server (which means your username and password are valid) but not able to select your database. MySQL reports the following message: %error.<ul><li>Are you sure you have the correct database name?</li><li>Are you sure the database exists?</li><li>Are you sure the username has permission to access the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%error' => mysqli_error())), 'error');
+    drupal_set_message(st('We were able to connect to the MySQL database server (which means your username and password are valid) but not able to select your database. MySQL reports the following message: %error.<ul><li>Are you sure you have the correct database name?</li><li>Are you sure the database exists?</li><li>Are you sure the username has permission to access the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%error' => mysqli_error($connection))), 'error');
     return FALSE;
   }
 
@@ -55,8 +55,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test CREATE.
   $query = 'CREATE TABLE drupal_install_test (id int(1) NULL)';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to create a test table on your MySQL database server with the command %query. MySQL reports the following message: %error.<ul><li>Are you sure the configured username has the necessary MySQL permissions to create tables in the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%query' => $query, '%error' => $error)), 'error');
     return FALSE;
   }
@@ -66,8 +66,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test INSERT.
   $query = 'INSERT INTO drupal_install_test (id) VALUES (1)';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to insert a value into a test table on your MySQL database server. We tried inserting a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }
@@ -77,8 +77,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test UPDATE.
   $query = 'UPDATE drupal_install_test SET id = 2';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to update a value in a test table on your MySQL database server. We tried updating a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }
@@ -88,8 +88,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test LOCK.
   $query = 'LOCK TABLES drupal_install_test WRITE';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to lock a test table on your MySQL database server. We tried locking a table with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }
@@ -99,8 +99,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test UNLOCK.
   $query = 'UNLOCK TABLES';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to unlock a test table on your MySQL database server. We tried unlocking a table with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }
@@ -110,8 +110,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test DELETE.
   $query = 'DELETE FROM drupal_install_test';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to delete a value from a test table on your MySQL database server. We tried deleting a value with the command %query and MySQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }
@@ -121,8 +121,8 @@ function drupal_test_mysqli($url, &$success) {
 
   // Test DROP.
   $query = 'DROP TABLE drupal_install_test';
-  $result = mysqli_query($query);
-  if ($error = mysqli_error()) {
+  $result = mysqli_query($connection, $query);
+  if ($error = mysqli_error($connection)) {
     drupal_set_message(st('We were unable to drop a test table from your MySQL database server. We tried dropping a table with the command %query and MySQL reported the following error %error.', array('%query' => $query, '%error' => $error)), 'error');
     $err = TRUE;
   }