diff --git a/core/lib/Drupal/Core/Database/Schema.php b/core/lib/Drupal/Core/Database/Schema.php
index d3e1ba4..9275be8 100644
--- a/core/lib/Drupal/Core/Database/Schema.php
+++ b/core/lib/Drupal/Core/Database/Schema.php
@@ -425,7 +425,7 @@ public function fieldExists($table, $column) {
    */
   abstract public function copyTable($source, $destination);
 
-  /**
+  /**j
    * Add a new field to a table.
    *
    * @param $table
@@ -446,7 +446,7 @@ public function fieldExists($table, $column) {
    *   or index including it in this array. See db_change_field() for more
    *   explanation why.
    *
-   * @throws Drupal\Core\Database\SchemaObjectDoesNotExistException
+   * @throws Drupal\Core\Database\SchemaObjectDoesNotExistExceptionV
    *   If the specified table doesn't exist.
    * @throws Drupal\Core\Database\SchemaObjectExistsException
    *   If the specified table already has a field by that name.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php b/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php
index 4c0085b..05866b9 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php
@@ -8,6 +8,8 @@
 namespace Drupal\system\Tests\Database;
 
 use Drupal\Core\Database\Database;
+use Drupal\Core\Database\SchemaObjectDoesNotExistException;
+use Drupal\Core\Database\SchemaObjectExistsException;
 use Drupal\simpletest\UnitTestBase;
 
 /**
@@ -100,6 +102,25 @@ function testSchema() {
     $count = db_select('test_table3')->countQuery()->execute()->fetchField();
     $this->assertEqual($count, 0, 'The new table has no content.');
 
+    // Ensure that the proper exceptions are thrown for db_copy_table().
+    $fail = FALSE;
+    try {
+      db_copy_table('test_table4', 'test_table5');
+    }
+    catch (SchemaObjectDoesNotExistException $e) {
+      $fail = TRUE;
+    }
+    $this->assertTrue($fail, 'Ensure that db_copy_table throws an exception when the source table does not exists.');
+
+    $fail = FALSE;
+    try {
+      db_copy_table('test_table2', 'test_table3');
+    }
+    catch (SchemaObjectExistsException $e) {
+      $fail = TRUE;
+    }
+    $this->assertTrue($fail, 'Ensure that db_copy_table throws an exception when the destination table does already exists.');
+
     // We need the default so that we can insert after the rename.
     db_field_set_default('test_table2', 'test_field', 0);
     $this->assertFalse($this->tryInsert(), 'Insert into the old table failed.');