diff --git a/core/tests/Drupal/KernelTests/Core/Database/PrefixInfoTest.php b/core/tests/Drupal/KernelTests/Core/Database/PrefixInfoTest.php
index 8032dd2..15c89d9 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/PrefixInfoTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/PrefixInfoTest.php
@@ -13,45 +13,53 @@ class PrefixInfoTest extends DatabaseTestBase {

   /**
    * Tests that DatabaseSchema::getPrefixInfo() returns the right database.
+   *
+   * We are testing if the return array of the method
+   * \Drupal\Core\Database\Driver\mysql\Schema::getPrefixInfo(). This return
+   * array is a keyed array with info about amongst other things the database.
+   * The other two by Drupal core supported databases do not have this variable
+   * set in the return array.
    */
   function testGetPrefixInfo() {
     $connection_info = Database::getConnectionInfo('default');
-    // Copy the default connection info to the 'extra' key.
-    Database::addConnectionInfo('extra', 'default', $connection_info['default']);
-
-    $db1_connection = Database::getConnection('default', 'default');
-    $db1_schema = $db1_connection->schema();
-    $db2_connection = Database::getConnection('default', 'extra');
-
-    // Get the prefix info for the first databse.
-    $method = new \ReflectionMethod($db1_schema, 'getPrefixInfo');
-    $method->setAccessible(TRUE);
-    $db1_info = $method->invoke($db1_schema);
-
-    // We change the database after opening the connection, so as to prevent
-    // connecting to a non-existent database.
-    $reflection = new \ReflectionObject($db2_connection);
-    $property = $reflection->getProperty('connectionOptions');
-    $property->setAccessible(TRUE);
-    $connection_info['default']['database'] = 'foobar';
-    $property->setValue($db2_connection, $connection_info['default']);
-
-    // For testing purposes, we also change the database info.
-    $reflection_class = new \ReflectionClass('Drupal\Core\Database\Database');
-    $property = $reflection_class->getProperty('databaseInfo');
-    $property->setAccessible(TRUE);
-    $info = $property->getValue();
-    $info['extra']['default']['database'] = 'foobar';
-    $property->setValue(NULL, $info);
-
-    $extra_info = Database::getConnectionInfo('extra');
-    $this->assertSame($extra_info['default']['database'], 'foobar');
-    $db2_schema = $db2_connection->schema();
-    $db2_info = $method->invoke($db2_schema);
-
-    $this->assertNotSame($db2_info['database'], $db1_info['database'], 'Each target connection has a different database.');
-    $this->assertSame($db2_info['database'], 'foobar', 'The new profile has a different database.');
-
-    Database::removeConnection('extra');
+    if ($connection_info['default']['driver'] == 'mysql') {
+      // Copy the default connection info to the 'extra' key.
+      Database::addConnectionInfo('extra', 'default', $connection_info['default']);
+
+      $db1_connection = Database::getConnection('default', 'default');
+      $db1_schema = $db1_connection->schema();
+      $db2_connection = Database::getConnection('default', 'extra');
+
+      // Get the prefix info for the first databse.
+      $method = new \ReflectionMethod($db1_schema, 'getPrefixInfo');
+      $method->setAccessible(TRUE);
+      $db1_info = $method->invoke($db1_schema);
+
+      // We change the database after opening the connection, so as to prevent
+      // connecting to a non-existent database.
+      $reflection = new \ReflectionObject($db2_connection);
+      $property = $reflection->getProperty('connectionOptions');
+      $property->setAccessible(TRUE);
+      $connection_info['default']['database'] = 'foobar';
+      $property->setValue($db2_connection, $connection_info['default']);
+
+      // For testing purposes, we also change the database info.
+      $reflection_class = new \ReflectionClass('Drupal\Core\Database\Database');
+      $property = $reflection_class->getProperty('databaseInfo');
+      $property->setAccessible(TRUE);
+      $info = $property->getValue();
+      $info['extra']['default']['database'] = 'foobar';
+      $property->setValue(NULL, $info);
+
+      $extra_info = Database::getConnectionInfo('extra');
+      $this->assertSame($extra_info['default']['database'], 'foobar');
+      $db2_schema = $db2_connection->schema();
+      $db2_info = $method->invoke($db2_schema);
+
+      $this->assertNotSame($db2_info['database'], $db1_info['database'], 'Each target connection has a different database.');
+      $this->assertSame($db2_info['database'], 'foobar', 'The new profile has a different database.');
+
+      Database::removeConnection('extra');
+    }
   }
 }