diff --git a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
index 372dc9f..7d03abd 100644
--- a/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
+++ b/core/tests/Drupal/Tests/Core/Database/ConnectionTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Database\ConnectionTest.
+ * Contains Drupal\system\Tests\Database\ConnectionTest.
  */
 
 namespace Drupal\Tests\Core\Database;
@@ -19,6 +19,9 @@
  */
 class ConnectionTest extends UnitTestCase {
 
+  /**
+   * {@inheritdoc}
+   */
   public static function getInfo() {
     return array(
       'name' => 'Connection Test',
@@ -27,6 +30,14 @@ public static function getInfo() {
     );
   }
 
+  /**
+   * Dataprovider for testPrefixRoundTrip().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Arguments to pass to Connection::setPrefix().
+   *   - Expected result from Connection::tablePrefix().
+   */
   public function providerPrefixRoundTrip() {
     return array (
       array (
@@ -68,6 +79,15 @@ public function testPrefixRoundTrip($expected, $prefixInfo) {
     }
   }
 
+  /**
+   * Dataprovider for testPrefixTables().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected result.
+   *   - Table prefix.
+   *   - Query to be prefixed.
+   */
   public function providerTestPrefixTables() {
     return array (
       array (
@@ -97,6 +117,14 @@ public function testPrefixTables($expected, $prefixInfo, $query) {
     $this->assertEquals($expected, $connection->prefixTables($query));
   }
 
+  /**
+   * Dataprovider for testEscapeMethods().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected escaped string.
+   *   - String to escape.
+   */
   public function providerEscapeMethods() {
     return array (
       array ('thing', 'thing'),
@@ -126,6 +154,16 @@ public function testEscapeMethods($expected, $name) {
     $this->assertEquals($expected, $connection->escapeAlias($name));
   }
 
+  /**
+   * Dataprovider for testGetDriverClass().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected namespaced class name.
+   *   - Driver.
+   *   - Namespace.
+   *   - Class name without namespace.
+   */
   public function providerGetDriverClass() {
     return array (
       array(
@@ -162,6 +200,15 @@ public function testGetDriverClass($expected, $driver, $namespace, $class) {
     $this->assertEquals($expected, $connection->getDriverClass($class));
   }
 
+  /**
+   * Dataprovider for testSchema().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected namespaced class of schema object.
+   *   - Driver for PDO connection.
+   *   - Namespace for connection.
+   */
   public function providerSchema() {
     return array (
       array(
@@ -173,7 +220,7 @@ public function providerSchema() {
   }
 
   /**
-   * Test schema().
+   * Test Connection::schema().
    *
    * @dataProvider providerSchema
    */
@@ -204,6 +251,14 @@ public function testDestroy() {
     $this->assertAttributeEquals(NULL, 'schema', $connection);
   }
 
+  /**
+   * Dataprovider for testMakeComments().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected filtered comment.
+   *   - Arguments for Connection::makeComment().
+   */
   public function providerMakeComments() {
     return array(
       array ('/*  */ ', array ('')),
@@ -222,6 +277,14 @@ public function testMakeComments($expected, $commentArray) {
     $this->assertEquals($expected, $connection->makeComment($commentArray));
   }
 
+  /**
+   * Dataprovider for testFilterComments().
+   *
+   * @return array
+   *   Array of arrays with the following elements:
+   *   - Expected filtered comment.
+   *   - Comment to filter.
+   */
   public function providerFilterComments() {
     return array(
       array ('', ''),