diff --git a/composer.json b/composer.json
index f356b14f2..54ef999f1 100755
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
   },
   "require-dev": {
     "php": ">=5.5.17",
-    "phpunit/phpunit": "^4.8"
+    "phpunit/phpunit": "^4.8.35"
   },
   "suggest": {
     "php-64bit": ">=5.5.9"
diff --git a/tests/Google/AdsApi/AdWords/AdWordsGuzzleLogMessageFormatterProviderTest.php b/tests/Google/AdsApi/AdWords/AdWordsGuzzleLogMessageFormatterProviderTest.php
index 72fae0dbc..f24a4d7c1 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsGuzzleLogMessageFormatterProviderTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsGuzzleLogMessageFormatterProviderTest.php
@@ -21,7 +21,7 @@
 use Google\Auth\FetchAuthTokenInterface;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\Psr7\Response;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdWordsGuzzleLogMessageFormatterProvider`.
@@ -30,14 +30,14 @@
  * @small
  */
 class AdWordsGuzzleLogMessageFormatterProviderTest
-    extends PHPUnit_Framework_TestCase {
+    extends TestCase {
 
   private $adWordsGuzzleLogMessageFormatter;
   private $reportDownloadResult;
   private $awql;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/AdWordsHeaderHandlerTest.php b/tests/Google/AdsApi/AdWords/AdWordsHeaderHandlerTest.php
index 564bd17ab..c24db0833 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsHeaderHandlerTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsHeaderHandlerTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\AdWords;
 
 use Google\Auth\FetchAuthTokenInterface;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdWordsHeaderHandler`.
@@ -25,13 +25,13 @@
  * @see AdWordsHeaderHandler
  * @small
  */
-class AdWordsHeaderHandlerTest extends PHPUnit_Framework_TestCase {
+class AdWordsHeaderHandlerTest extends TestCase {
 
   private $adWordsHeaderHandler;
   private $adWordsSessionBuilder;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->adWordsHeaderHandler = new AdWordsHeaderHandler();
diff --git a/tests/Google/AdsApi/AdWords/AdWordsNormalizerTest.php b/tests/Google/AdsApi/AdWords/AdWordsNormalizerTest.php
index 66e6554eb..99786301f 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsNormalizerTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsNormalizerTest.php
@@ -21,7 +21,7 @@
 use Google\AdsApi\AdWords\Testing\FakeBudget;
 use Google\AdsApi\AdWords\Testing\FakeMoney;
 use Google\AdsApi\AdWords\Testing\FakeMutateResult;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
 use Symfony\Component\Serializer\Normalizer\ArrayDenormalizer;
 use Symfony\Component\Serializer\Serializer;
@@ -32,12 +32,12 @@
  * @see AdWordsNormalizer
  * @small
  */
-class AdWordsNormalizerTest extends PHPUnit_Framework_TestCase {
+class AdWordsNormalizerTest extends TestCase {
 
   private $serializer;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->serializer = new Serializer(
diff --git a/tests/Google/AdsApi/AdWords/AdWordsServicesIntegrationTest.php b/tests/Google/AdsApi/AdWords/AdWordsServicesIntegrationTest.php
index 8b2b730e0..f7c9c7c63 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsServicesIntegrationTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsServicesIntegrationTest.php
@@ -27,7 +27,7 @@
 use Google\Auth\FetchAuthTokenInterface;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Integration test for `AdWordsServices`.
@@ -39,7 +39,7 @@
  * @see AdWordsServices
  * @large
  */
-class AdWordsServicesIntegrationTest extends PHPUnit_Framework_TestCase {
+class AdWordsServicesIntegrationTest extends TestCase {
 
   private static $WSDL_FILE_DIR;
 
@@ -50,7 +50,7 @@ class AdWordsServicesIntegrationTest extends PHPUnit_Framework_TestCase {
   private $adWordsServices;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     self::$WSDL_FILE_DIR = __DIR__ . '/../../../../';
diff --git a/tests/Google/AdsApi/AdWords/AdWordsSessionBuilderTest.php b/tests/Google/AdsApi/AdWords/AdWordsSessionBuilderTest.php
index 7ba9ec4a3..10f5d66c9 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsSessionBuilderTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsSessionBuilderTest.php
@@ -21,7 +21,7 @@
 use Monolog\Handler\NullHandler;
 use Monolog\Handler\StreamHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -30,13 +30,13 @@
  * @see AdWordsSessionBuilder
  * @small
  */
-class AdWordsSessionBuilderTest extends PHPUnit_Framework_TestCase {
+class AdWordsSessionBuilderTest extends TestCase {
 
   private $adWordsSessionBuilder;
   private $fetchAuthTokenInterfaceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->adWordsSessionBuilder = new AdWordsSessionBuilder();
diff --git a/tests/Google/AdsApi/AdWords/AdWordsSoapLogMessageFormatterProviderTest.php b/tests/Google/AdsApi/AdWords/AdWordsSoapLogMessageFormatterProviderTest.php
index 6a7059239..46d9a02cf 100755
--- a/tests/Google/AdsApi/AdWords/AdWordsSoapLogMessageFormatterProviderTest.php
+++ b/tests/Google/AdsApi/AdWords/AdWordsSoapLogMessageFormatterProviderTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\AdWords;
 
 use Google\AdsApi\Common\Testing\FakeSoapPayloadsAndLogsProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdWordsSoapLogMessageFormatterProvider`.
@@ -26,7 +26,7 @@
  * @small
  */
 class AdWordsSoapLogMessageFormatterProviderTest
-    extends PHPUnit_Framework_TestCase {
+    extends TestCase {
 
   private $adWordsSoapLogMessageFormatter;
   private $requestHttpHeadersMock;
@@ -34,7 +34,7 @@ class AdWordsSoapLogMessageFormatterProviderTest
   private $responseSoapXmlMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->adWordsSoapLogMessageFormatter =
diff --git a/tests/Google/AdsApi/AdWords/BatchJobs/BatchJobUploadStatusTest.php b/tests/Google/AdsApi/AdWords/BatchJobs/BatchJobUploadStatusTest.php
index 5cc98e3e5..2c8a4b65f 100755
--- a/tests/Google/AdsApi/AdWords/BatchJobs/BatchJobUploadStatusTest.php
+++ b/tests/Google/AdsApi/AdWords/BatchJobs/BatchJobUploadStatusTest.php
@@ -25,7 +25,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `BatchJobUploadStatus`.
@@ -33,7 +33,7 @@
  * @see BatchJobUploadStatus
  * @small
  */
-class BatchJobUploadStatusTest extends PHPUnit_Framework_TestCase {
+class BatchJobUploadStatusTest extends TestCase {
 
   private static $DUMMY_UPLOAD_URL = 'https://www.googleapis.com/upload';
   private static $DUMMY_RESUMABLE_UPLOAD_URL =
@@ -43,7 +43,7 @@ class BatchJobUploadStatusTest extends PHPUnit_Framework_TestCase {
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/BatchJobs/v201702/BatchJobsDelegateTest.php b/tests/Google/AdsApi/AdWords/BatchJobs/v201702/BatchJobsDelegateTest.php
index 616750d69..839b9f759 100755
--- a/tests/Google/AdsApi/AdWords/BatchJobs/v201702/BatchJobsDelegateTest.php
+++ b/tests/Google/AdsApi/AdWords/BatchJobs/v201702/BatchJobsDelegateTest.php
@@ -30,7 +30,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `BatchJobsDelegate`.
@@ -38,7 +38,7 @@
  * @see BatchJobsDelegate
  * @small
  */
-class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
+class BatchJobsDelegateTest extends TestCase {
 
   private static $DUMMY_UPLOAD_URL = 'https://www.googleapis.com/upload';
   private static $DUMMY_RESUMABLE_UPLOAD_URL =
@@ -50,7 +50,7 @@ class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/BatchJobs/v201705/BatchJobsDelegateTest.php b/tests/Google/AdsApi/AdWords/BatchJobs/v201705/BatchJobsDelegateTest.php
index b29a0f9b2..ae4f5b2bc 100755
--- a/tests/Google/AdsApi/AdWords/BatchJobs/v201705/BatchJobsDelegateTest.php
+++ b/tests/Google/AdsApi/AdWords/BatchJobs/v201705/BatchJobsDelegateTest.php
@@ -30,7 +30,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `BatchJobsDelegate`.
@@ -38,7 +38,7 @@
  * @see BatchJobsDelegate
  * @small
  */
-class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
+class BatchJobsDelegateTest extends TestCase {
 
   private static $DUMMY_UPLOAD_URL = 'https://www.googleapis.com/upload';
   private static $DUMMY_RESUMABLE_UPLOAD_URL =
@@ -50,7 +50,7 @@ class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/BatchJobs/v201708/BatchJobsDelegateTest.php b/tests/Google/AdsApi/AdWords/BatchJobs/v201708/BatchJobsDelegateTest.php
index 1c21c2a12..734b3fa40 100755
--- a/tests/Google/AdsApi/AdWords/BatchJobs/v201708/BatchJobsDelegateTest.php
+++ b/tests/Google/AdsApi/AdWords/BatchJobs/v201708/BatchJobsDelegateTest.php
@@ -30,7 +30,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `BatchJobsDelegate`.
@@ -38,7 +38,7 @@
  * @see BatchJobsDelegate
  * @small
  */
-class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
+class BatchJobsDelegateTest extends TestCase {
 
   private static $DUMMY_UPLOAD_URL = 'https://www.googleapis.com/upload';
   private static $DUMMY_RESUMABLE_UPLOAD_URL =
@@ -50,7 +50,7 @@ class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/BatchJobs/v201710/BatchJobsDelegateTest.php b/tests/Google/AdsApi/AdWords/BatchJobs/v201710/BatchJobsDelegateTest.php
index e47c57a92..9896f3317 100755
--- a/tests/Google/AdsApi/AdWords/BatchJobs/v201710/BatchJobsDelegateTest.php
+++ b/tests/Google/AdsApi/AdWords/BatchJobs/v201710/BatchJobsDelegateTest.php
@@ -30,7 +30,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `BatchJobsDelegate`.
@@ -38,7 +38,7 @@
  * @see BatchJobsDelegate
  * @small
  */
-class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
+class BatchJobsDelegateTest extends TestCase {
 
   private static $DUMMY_UPLOAD_URL = 'https://www.googleapis.com/upload';
   private static $DUMMY_RESUMABLE_UPLOAD_URL =
@@ -50,7 +50,7 @@ class BatchJobsDelegateTest extends PHPUnit_Framework_TestCase {
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/ReportDownloadResultDelegateTest.php b/tests/Google/AdsApi/AdWords/Reporting/ReportDownloadResultDelegateTest.php
index 1779ec8f8..99b692027 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/ReportDownloadResultDelegateTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/ReportDownloadResultDelegateTest.php
@@ -18,7 +18,7 @@
 
 use Google\AdsApi\AdWords\Testing\Reporting\ReportDownloadResultTestProvider;
 use GuzzleHttp\Psr7\Response;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use RuntimeException;
 
 /**
@@ -27,13 +27,13 @@
  * @see ReportDownloadResultDelegate
  * @small
  */
-class ReportDownloadResultDelegateTest extends PHPUnit_Framework_TestCase {
+class ReportDownloadResultDelegateTest extends TestCase {
 
   private $fakeReport;
   private $reportDownloadResultDelegate;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->fakeReport =
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201702/ReportDownloaderTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201702/ReportDownloaderTest.php
index 16f3a226d..cbb2e60ab 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201702/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201702/ReportDownloaderTest.php
@@ -32,7 +32,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -40,12 +40,12 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201702/RequestOptionsFactoryTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201702/RequestOptionsFactoryTest.php
index e8b6ba086..2796f65de 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201702/RequestOptionsFactoryTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201702/RequestOptionsFactoryTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\ClientInterface;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `RequestOptionsFactory`.
@@ -36,7 +36,7 @@
  * @see RequestOptionsFactory
  * @small
  */
-class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
+class RequestOptionsFactoryTest extends TestCase {
 
   private static $DEFAULT_TIMEOUT_IN_SECONDS = 120;
 
@@ -45,7 +45,7 @@ class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
   private $libraryMetadataProviderMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceMock = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201705/ReportDownloaderTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201705/ReportDownloaderTest.php
index 9e4deacc8..061928576 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201705/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201705/ReportDownloaderTest.php
@@ -32,7 +32,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -40,12 +40,12 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201705/RequestOptionsFactoryTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201705/RequestOptionsFactoryTest.php
index 4966a055b..e7adfc61e 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201705/RequestOptionsFactoryTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201705/RequestOptionsFactoryTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\ClientInterface;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `RequestOptionsFactory`.
@@ -36,7 +36,7 @@
  * @see RequestOptionsFactory
  * @small
  */
-class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
+class RequestOptionsFactoryTest extends TestCase {
 
   private static $DEFAULT_TIMEOUT_IN_SECONDS = 120;
 
@@ -45,7 +45,7 @@ class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
   private $libraryMetadataProviderMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceMock = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201708/ReportDownloaderTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201708/ReportDownloaderTest.php
index 944c3456b..d99eb7031 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201708/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201708/ReportDownloaderTest.php
@@ -32,7 +32,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -40,12 +40,12 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201708/RequestOptionsFactoryTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201708/RequestOptionsFactoryTest.php
index b2045c66c..ce5f7b42e 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201708/RequestOptionsFactoryTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201708/RequestOptionsFactoryTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\ClientInterface;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `RequestOptionsFactory`.
@@ -36,7 +36,7 @@
  * @see RequestOptionsFactory
  * @small
  */
-class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
+class RequestOptionsFactoryTest extends TestCase {
 
   private static $DEFAULT_TIMEOUT_IN_SECONDS = 120;
 
@@ -45,7 +45,7 @@ class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
   private $libraryMetadataProviderMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceMock = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201710/ReportDownloaderTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201710/ReportDownloaderTest.php
index e5c058542..96aa01f9b 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201710/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201710/ReportDownloaderTest.php
@@ -32,7 +32,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -40,12 +40,12 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $adWordsSession;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/AdWords/Reporting/v201710/RequestOptionsFactoryTest.php b/tests/Google/AdsApi/AdWords/Reporting/v201710/RequestOptionsFactoryTest.php
index 9a1824ea3..e6e44c5b9 100755
--- a/tests/Google/AdsApi/AdWords/Reporting/v201710/RequestOptionsFactoryTest.php
+++ b/tests/Google/AdsApi/AdWords/Reporting/v201710/RequestOptionsFactoryTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\ClientInterface;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `RequestOptionsFactory`.
@@ -36,7 +36,7 @@
  * @see RequestOptionsFactory
  * @small
  */
-class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
+class RequestOptionsFactoryTest extends TestCase {
 
   private static $DEFAULT_TIMEOUT_IN_SECONDS = 120;
 
@@ -45,7 +45,7 @@ class RequestOptionsFactoryTest extends PHPUnit_Framework_TestCase {
   private $libraryMetadataProviderMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceMock = $this
diff --git a/tests/Google/AdsApi/Common/AdsGuzzleHttpClientFactoryTest.php b/tests/Google/AdsApi/Common/AdsGuzzleHttpClientFactoryTest.php
index 9ff74be20..3e703bfad 100755
--- a/tests/Google/AdsApi/Common/AdsGuzzleHttpClientFactoryTest.php
+++ b/tests/Google/AdsApi/Common/AdsGuzzleHttpClientFactoryTest.php
@@ -21,7 +21,7 @@
 use GuzzleHttp\Middleware;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdsGuzzleHttpClientFactory`.
@@ -29,7 +29,7 @@
  * @see AdsGuzzleHttpClientFactory
  * @small
  */
-class AdsGuzzleHttpClientFactoryTest extends PHPUnit_Framework_TestCase {
+class AdsGuzzleHttpClientFactoryTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\GuzzleHttpClientFactory::generateHttpClient
diff --git a/tests/Google/AdsApi/Common/AdsGuzzleProxyHttpHandlerTest.php b/tests/Google/AdsApi/Common/AdsGuzzleProxyHttpHandlerTest.php
index 6ded81e2e..23c04f47b 100755
--- a/tests/Google/AdsApi/Common/AdsGuzzleProxyHttpHandlerTest.php
+++ b/tests/Google/AdsApi/Common/AdsGuzzleProxyHttpHandlerTest.php
@@ -18,7 +18,7 @@
 
 use GuzzleHttp\Client;
 use GuzzleHttp\Psr7\Response;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 
@@ -28,10 +28,10 @@
  * @see AdsGuzzleProxyHttpHandler
  * @small
  */
-class AdsGuzzleProxyHttpHandlerTest extends PHPUnit_Framework_TestCase {
+class AdsGuzzleProxyHttpHandlerTest extends TestCase {
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->mockRequest =
diff --git a/tests/Google/AdsApi/Common/AdsHeaderFormatterTest.php b/tests/Google/AdsApi/Common/AdsHeaderFormatterTest.php
index 6d973a5fa..9e4081560 100755
--- a/tests/Google/AdsApi/Common/AdsHeaderFormatterTest.php
+++ b/tests/Google/AdsApi/Common/AdsHeaderFormatterTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common;
 
 use Google\AdsApi\Common\Testing\ApplicationNames;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `AdsHeaderFormatter`.
@@ -25,13 +25,13 @@
  * @see AdsHeaderFormatter
  * @small
  */
-class AdsHeaderFormatterTest extends PHPUnit_Framework_TestCase {
+class AdsHeaderFormatterTest extends TestCase {
 
   private $applicationNames;
   private $adsHeaderFormatter;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->applicationNames = new ApplicationNames();
diff --git a/tests/Google/AdsApi/Common/AdsLoggerFactoryTest.php b/tests/Google/AdsApi/Common/AdsLoggerFactoryTest.php
index 76adf60cb..77e532fde 100755
--- a/tests/Google/AdsApi/Common/AdsLoggerFactoryTest.php
+++ b/tests/Google/AdsApi/Common/AdsLoggerFactoryTest.php
@@ -18,7 +18,7 @@
 
 use Monolog\Logger;
 use Monolog\Handler\StreamHandler;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdsLoggerFactory`.
@@ -26,12 +26,12 @@
  * @see AdsLoggerFactory
  * @small
  */
-class AdsLoggerFactoryTest extends PHPUnit_Framework_TestCase {
+class AdsLoggerFactoryTest extends TestCase {
 
   private $adsLoggerFactory;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->adsLoggerFactory = new AdsLoggerFactory();
diff --git a/tests/Google/AdsApi/Common/AdsSoapClientFactoryTest.php b/tests/Google/AdsApi/Common/AdsSoapClientFactoryTest.php
index 4b97bf838..28db80459 100755
--- a/tests/Google/AdsApi/Common/AdsSoapClientFactoryTest.php
+++ b/tests/Google/AdsApi/Common/AdsSoapClientFactoryTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common;
 
 use Google\AdsApi\Common\Util\Reflection;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdsSoapClientFactory`.
@@ -25,7 +25,7 @@
  * @see AdsSoapClientFactory
  * @small
  */
-class AdsSoapClientFactoryTest extends PHPUnit_Framework_TestCase {
+class AdsSoapClientFactoryTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\AdsSoapClientFactory::generateSoapClient
diff --git a/tests/Google/AdsApi/Common/AdsUtilityRegistryTest.php b/tests/Google/AdsApi/Common/AdsUtilityRegistryTest.php
index fd76a0ad7..b3cfafea8 100755
--- a/tests/Google/AdsApi/Common/AdsUtilityRegistryTest.php
+++ b/tests/Google/AdsApi/Common/AdsUtilityRegistryTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `AdsUtilityRegistry`.
@@ -24,12 +24,12 @@
  * @see AdsUtilityRegistry
  * @small
  */
-class AdsUtilityRegistryTest extends PHPUnit_Framework_TestCase {
+class AdsUtilityRegistryTest extends TestCase {
 
   private $adsUtilityRegistry;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   public function setUp() {
     $this->adsUtilityRegistry = AdsUtilityRegistry::getInstance();
diff --git a/tests/Google/AdsApi/Common/ConfigurationLoaderTest.php b/tests/Google/AdsApi/Common/ConfigurationLoaderTest.php
index 8edf987fc..954cc1bc7 100755
--- a/tests/Google/AdsApi/Common/ConfigurationLoaderTest.php
+++ b/tests/Google/AdsApi/Common/ConfigurationLoaderTest.php
@@ -18,7 +18,7 @@
 
 use Google\AdsApi\Common\Testing\ConfigurationLoaderTestProvider;
 use Google\AdsApi\Common\Util\EnvironmentalVariables;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ConfigurationLoader`.
@@ -26,12 +26,12 @@
  * @see ConfigurationLoader
  * @small
  */
-class ConfigurationLoaderTest extends PHPUnit_Framework_TestCase {
+class ConfigurationLoaderTest extends TestCase {
 
   private $configurationLoader;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $environmentalVariablesMock = $this
diff --git a/tests/Google/AdsApi/Common/ConfigurationTest.php b/tests/Google/AdsApi/Common/ConfigurationTest.php
index c85096e4b..6776bb553 100755
--- a/tests/Google/AdsApi/Common/ConfigurationTest.php
+++ b/tests/Google/AdsApi/Common/ConfigurationTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `Configuration`.
@@ -24,7 +24,7 @@
  * @see Configuration
  * @small
  */
-class ConfigurationTest extends PHPUnit_Framework_TestCase {
+class ConfigurationTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\Configuration::getConfiguration
diff --git a/tests/Google/AdsApi/Common/ConnectionSettingsBuilderTest.php b/tests/Google/AdsApi/Common/ConnectionSettingsBuilderTest.php
index c40b1889d..2cd2b28fe 100755
--- a/tests/Google/AdsApi/Common/ConnectionSettingsBuilderTest.php
+++ b/tests/Google/AdsApi/Common/ConnectionSettingsBuilderTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ConnectionSettingsBuilder`.
@@ -24,12 +24,12 @@
  * @see ConnectionSettingsBuilder
  * @small
  */
-class ConnectionSettingsBuilderTest extends PHPUnit_Framework_TestCase {
+class ConnectionSettingsBuilderTest extends TestCase {
 
   private $connectionSettingsBuilder;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->connectionSettingsBuilder = new ConnectionSettingsBuilder();
diff --git a/tests/Google/AdsApi/Common/ConnectionSettingsTest.php b/tests/Google/AdsApi/Common/ConnectionSettingsTest.php
index e1186175a..d694d28a3 100755
--- a/tests/Google/AdsApi/Common/ConnectionSettingsTest.php
+++ b/tests/Google/AdsApi/Common/ConnectionSettingsTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ConnectionSettings`.
@@ -24,7 +24,7 @@
  * @see ConnectionSettings
  * @small
  */
-class ConnectionSettingsTest extends PHPUnit_Framework_TestCase {
+class ConnectionSettingsTest extends TestCase {
 
   /**
    * @param array $value the array of proxies to evaluate
diff --git a/tests/Google/AdsApi/Common/GuzzleLogMessageFormatterTest.php b/tests/Google/AdsApi/Common/GuzzleLogMessageFormatterTest.php
index 8417dcfd8..382ac4d5d 100755
--- a/tests/Google/AdsApi/Common/GuzzleLogMessageFormatterTest.php
+++ b/tests/Google/AdsApi/Common/GuzzleLogMessageFormatterTest.php
@@ -20,7 +20,7 @@
 use GuzzleHttp\Exception\ClientException;
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\Psr7\Response;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `GuzzleLogMessageFormatter`.
@@ -28,7 +28,7 @@
  * @see GuzzleLogMessageFormatter
  * @small
  */
-class GuzzleLogMessageFormatterTest extends PHPUnit_Framework_TestCase {
+class GuzzleLogMessageFormatterTest extends TestCase {
 
   private $guzzleLogMessageFormatter;
   private $reportDownloadResult;
@@ -40,7 +40,7 @@ class GuzzleLogMessageFormatterTest extends PHPUnit_Framework_TestCase {
   private $reportDownloadLogOfReportDefinition;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->reportDownloadResult = FakeHttpPayloadsAndLogsProvider
diff --git a/tests/Google/AdsApi/Common/OAuth2TokenBuilderTest.php b/tests/Google/AdsApi/Common/OAuth2TokenBuilderTest.php
index 47effa35c..ce6e873ce 100755
--- a/tests/Google/AdsApi/Common/OAuth2TokenBuilderTest.php
+++ b/tests/Google/AdsApi/Common/OAuth2TokenBuilderTest.php
@@ -19,7 +19,7 @@
 use Google\AdsApi\Common\Testing\AdsBuildersTestProvider;
 use Google\Auth\Credentials\ServiceAccountCredentials;
 use Google\Auth\Credentials\UserRefreshCredentials;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `OAuth2TokenBuilder`.
@@ -27,13 +27,13 @@
  * @see OAuth2TokenBuilder
  * @small
  */
-class OAuth2TokenBuilderTest extends PHPUnit_Framework_TestCase {
+class OAuth2TokenBuilderTest extends TestCase {
 
   private $oAuth2TokenBuilder;
   private $jsonKeyFilePath;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->oAuth2TokenBuilder = new OAuth2TokenBuilder();
diff --git a/tests/Google/AdsApi/Common/SoapLogMessageFormatterTest.php b/tests/Google/AdsApi/Common/SoapLogMessageFormatterTest.php
index 5c90cb3f7..c825e94de 100755
--- a/tests/Google/AdsApi/Common/SoapLogMessageFormatterTest.php
+++ b/tests/Google/AdsApi/Common/SoapLogMessageFormatterTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common;
 
 use Google\AdsApi\Common\Testing\FakeSoapPayloadsAndLogsProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use SoapFault;
 
 /**
@@ -26,7 +26,7 @@
  * @see SoapLogMessageFormatter
  * @small
  */
-class SoapLogMessageFormatterTest extends PHPUnit_Framework_TestCase {
+class SoapLogMessageFormatterTest extends TestCase {
 
   private $soapLogMessageFormatter;
   private $requestHttpHeadersMock;
@@ -39,7 +39,7 @@ class SoapLogMessageFormatterTest extends PHPUnit_Framework_TestCase {
   private $mutateResponseSoapXmlMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->soapLogMessageFormatter = new SoapLogMessageFormatter();
diff --git a/tests/Google/AdsApi/Common/SoapSettingsBuilderTest.php b/tests/Google/AdsApi/Common/SoapSettingsBuilderTest.php
index 7d44717f3..6c07d485f 100755
--- a/tests/Google/AdsApi/Common/SoapSettingsBuilderTest.php
+++ b/tests/Google/AdsApi/Common/SoapSettingsBuilderTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common;
 
 use Google\AdsApi\Common\Testing\AdsBuildersTestProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `SoapSettingsBuilder`.
@@ -25,12 +25,12 @@
  * @see SoapSettingsBuilder
  * @small
  */
-class SoapSettingsBuilderTest extends PHPUnit_Framework_TestCase {
+class SoapSettingsBuilderTest extends TestCase {
 
   private $soapSettingsBuilder;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->soapSettingsBuilder = new SoapSettingsBuilder();
diff --git a/tests/Google/AdsApi/Common/Util/EnvironmentalVariablesTest.php b/tests/Google/AdsApi/Common/Util/EnvironmentalVariablesTest.php
index 696a37fbb..d712e3dc2 100755
--- a/tests/Google/AdsApi/Common/Util/EnvironmentalVariablesTest.php
+++ b/tests/Google/AdsApi/Common/Util/EnvironmentalVariablesTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common\Util;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `EnvironmentalVariables`.
@@ -24,12 +24,12 @@
  * @see EnvironmentalVariables
  * @small
  */
-class EnvironmentalVariablesTest extends PHPUnit_Framework_TestCase {
+class EnvironmentalVariablesTest extends TestCase {
 
   private $environmentalVariables;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->environmentalVariables = new EnvironmentalVariables();
diff --git a/tests/Google/AdsApi/Common/Util/LogMessageScrubbersTest.php b/tests/Google/AdsApi/Common/Util/LogMessageScrubbersTest.php
index ff93c1f1c..0f339f1ca 100755
--- a/tests/Google/AdsApi/Common/Util/LogMessageScrubbersTest.php
+++ b/tests/Google/AdsApi/Common/Util/LogMessageScrubbersTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Common\Util;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `LogMessageScrubbers`.
@@ -24,7 +24,7 @@
  * @see LogMessageScrubbers
  * @small
  */
-class LogMessageScrubbersTest extends PHPUnit_Framework_TestCase {
+class LogMessageScrubbersTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\Util\LogMessageScrubbers::scrubRequestHttpHeaders
diff --git a/tests/Google/AdsApi/Common/Util/MapEntriesTest.php b/tests/Google/AdsApi/Common/Util/MapEntriesTest.php
index 88e2d808e..bd831d6f3 100755
--- a/tests/Google/AdsApi/Common/Util/MapEntriesTest.php
+++ b/tests/Google/AdsApi/Common/Util/MapEntriesTest.php
@@ -18,7 +18,7 @@
 
 use Google\AdsApi\Common\Testing\FakeInvalidMapEntry;
 use Google\AdsApi\Common\Testing\FakeMapEntry;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `MapEntries`.
@@ -26,7 +26,7 @@
  * @see MapEntries
  * @small
  */
-class MapEntriesTest extends PHPUnit_Framework_TestCase {
+class MapEntriesTest extends TestCase {
 
   /**
    * @param array $mapEntries a list of map entries
diff --git a/tests/Google/AdsApi/Common/Util/OAuth2TokenRefresherTest.php b/tests/Google/AdsApi/Common/Util/OAuth2TokenRefresherTest.php
index 3bf0833b9..2aad26156 100755
--- a/tests/Google/AdsApi/Common/Util/OAuth2TokenRefresherTest.php
+++ b/tests/Google/AdsApi/Common/Util/OAuth2TokenRefresherTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common\Util;
 
 use Google\Auth\FetchAuthTokenInterface;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `OAuth2TokenRefresher`.
@@ -25,13 +25,13 @@
  * @see OAuth2TokenRefresher
  * @small
  */
-class OAuth2TokenRefresherTest extends PHPUnit_Framework_TestCase {
+class OAuth2TokenRefresherTest extends TestCase {
 
   private $fetchAuthTokenInterfaceMock;
   private $oAuth2TokenRefresher;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->fetchAuthTokenInterfaceMock = $this
diff --git a/tests/Google/AdsApi/Common/Util/SoapHeadersTest.php b/tests/Google/AdsApi/Common/Util/SoapHeadersTest.php
index 42de88533..e2d3d6a8c 100755
--- a/tests/Google/AdsApi/Common/Util/SoapHeadersTest.php
+++ b/tests/Google/AdsApi/Common/Util/SoapHeadersTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common\Util;
 
 use Google\AdsApi\Common\Testing\FakeSoapPayloadsAndLogsProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `SoapHeaders`.
@@ -25,7 +25,7 @@
  * @see SoapHeaders
  * @small
  */
-class SoapHeadersTest extends PHPUnit_Framework_TestCase {
+class SoapHeadersTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\Util\SoapHeaders::getSoapHeaderValue
diff --git a/tests/Google/AdsApi/Common/Util/SoapRequestsTest.php b/tests/Google/AdsApi/Common/Util/SoapRequestsTest.php
index 916741873..953429ea2 100755
--- a/tests/Google/AdsApi/Common/Util/SoapRequestsTest.php
+++ b/tests/Google/AdsApi/Common/Util/SoapRequestsTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Common\Util;
 
 use Google\AdsApi\Common\Testing\FakeSoapPayloadsAndLogsProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `SoapRequests`.
@@ -25,7 +25,7 @@
  * @see SoapRequests
  * @small
  */
-class SoapRequestsTest extends PHPUnit_Framework_TestCase {
+class SoapRequestsTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Common\Util\SoapRequests::replaceReferences
diff --git a/tests/Google/AdsApi/Dfp/DfpHeaderHandlerTest.php b/tests/Google/AdsApi/Dfp/DfpHeaderHandlerTest.php
index bcf739d6c..2379ccd97 100755
--- a/tests/Google/AdsApi/Dfp/DfpHeaderHandlerTest.php
+++ b/tests/Google/AdsApi/Dfp/DfpHeaderHandlerTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp;
 
 use Google\Auth\FetchAuthTokenInterface;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpHeaderHandler`.
@@ -25,13 +25,13 @@
  * @see DfpHeaderHandler
  * @small
  */
-class DfpHeaderHandlerTest extends PHPUnit_Framework_TestCase {
+class DfpHeaderHandlerTest extends TestCase {
 
   private $dfpHeaderHandler;
   private $dfpSessionBuilder;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->dfpHeaderHandler = new DfpHeaderHandler();
diff --git a/tests/Google/AdsApi/Dfp/DfpSessionBuilderTest.php b/tests/Google/AdsApi/Dfp/DfpSessionBuilderTest.php
index f925331ab..f714d4f5e 100755
--- a/tests/Google/AdsApi/Dfp/DfpSessionBuilderTest.php
+++ b/tests/Google/AdsApi/Dfp/DfpSessionBuilderTest.php
@@ -21,7 +21,7 @@
 use Monolog\Handler\NullHandler;
 use Monolog\Handler\StreamHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -30,13 +30,13 @@
  * @see DfpSessionBuilder
  * @small
  */
-class DfpSessionBuilderTest extends PHPUnit_Framework_TestCase {
+class DfpSessionBuilderTest extends TestCase {
 
   private $dfpSessionBuilder;
   private $fetchAuthTokenInterfaceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->dfpSessionBuilder = new DfpSessionBuilder();
diff --git a/tests/Google/AdsApi/Dfp/DfpSoapLogMessageFormatterProviderTest.php b/tests/Google/AdsApi/Dfp/DfpSoapLogMessageFormatterProviderTest.php
index 50fce180e..ce361f50d 100755
--- a/tests/Google/AdsApi/Dfp/DfpSoapLogMessageFormatterProviderTest.php
+++ b/tests/Google/AdsApi/Dfp/DfpSoapLogMessageFormatterProviderTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp;
 
 use Google\AdsApi\Common\Testing\FakeSoapPayloadsAndLogsProvider;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpSoapLogMessageFormatterProvider`.
@@ -26,7 +26,7 @@
  * @small
  */
 class DfpSoapLogMessageFormatterProviderTest
-    extends PHPUnit_Framework_TestCase {
+    extends TestCase {
 
   private $dfpSoapLogMessageFormatter;
   private $requestHttpHeadersMock;
@@ -34,7 +34,7 @@ class DfpSoapLogMessageFormatterProviderTest
   private $responseSoapXmlMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->dfpSoapLogMessageFormatter =
diff --git a/tests/Google/AdsApi/Dfp/Util/v201702/DfpDateTimesTest.php b/tests/Google/AdsApi/Dfp/Util/v201702/DfpDateTimesTest.php
index 2a9c7605a..35daee892 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201702/DfpDateTimesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201702/DfpDateTimesTest.php
@@ -20,7 +20,7 @@
 use DateTimeZone;
 use Google\AdsApi\Dfp\v201702\Date;
 use Google\AdsApi\Dfp\v201702\DateTime as DfpDateTime;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDateTimes`.
@@ -28,7 +28,7 @@
  * @see DfpDateTimes
  * @small
  */
-class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
+class DfpDateTimesTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'America/New_York';
   const TIME_ZONE_ID2 = 'PST8PDT';
@@ -50,7 +50,7 @@ class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
   private $stringDateTimeWithTimeZone3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDateTime1 = '1983-06-02T08:30:15';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201702/DfpDatesTest.php b/tests/Google/AdsApi/Dfp/Util/v201702/DfpDatesTest.php
index 941ad85a5..a2635f7f1 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201702/DfpDatesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201702/DfpDatesTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp\Util\v201702;
 
 use Google\AdsApi\Dfp\v201702\Date;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDates`.
@@ -25,7 +25,7 @@
  * @see DfpDates
  * @group small
  */
-class DfpDatesTest extends PHPUnit_Framework_TestCase {
+class DfpDatesTest extends TestCase {
 
   private $dfpDate1;
   private $dfpDate2;
@@ -36,7 +36,7 @@ class DfpDatesTest extends PHPUnit_Framework_TestCase {
   private $stringDate3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDate1 = '1983-06-02';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201702/PqlTest.php b/tests/Google/AdsApi/Dfp/Util/v201702/PqlTest.php
index 87fec5f42..6e0ce9faf 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201702/PqlTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201702/PqlTest.php
@@ -32,7 +32,7 @@
 use Google\AdsApi\Dfp\v201702\TargetingValue;
 use Google\AdsApi\Dfp\v201702\TextValue;
 use Google\AdsApi\Dfp\v201702\Value;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `Pql`.
@@ -40,7 +40,7 @@
  * @see Pql
  * @small
  */
-class PqlTest extends PHPUnit_Framework_TestCase {
+class PqlTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'Asia/Shanghai';
 
@@ -68,7 +68,7 @@ class PqlTest extends PHPUnit_Framework_TestCase {
   private $targeting1;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->column1 = new ColumnType('Id');
diff --git a/tests/Google/AdsApi/Dfp/Util/v201702/ReportDownloaderTest.php b/tests/Google/AdsApi/Dfp/Util/v201702/ReportDownloaderTest.php
index 8471897f2..59b42dc64 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201702/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201702/ReportDownloaderTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -36,13 +36,13 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $dfpSession;
   private $reportServiceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/Dfp/Util/v201702/StatementBuilderTest.php b/tests/Google/AdsApi/Dfp/Util/v201702/StatementBuilderTest.php
index 5cbaece31..81dd9431c 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201702/StatementBuilderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201702/StatementBuilderTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Dfp\Util\v201702;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `StatementBuilder`.
@@ -24,7 +24,7 @@
  * @see StatementBuilder
  * @small
  */
-class StatementBuilderTest extends PHPUnit_Framework_TestCase {
+class StatementBuilderTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Dfp\Util\v201702\StatementBuilder::toStatement
diff --git a/tests/Google/AdsApi/Dfp/Util/v201705/DfpDateTimesTest.php b/tests/Google/AdsApi/Dfp/Util/v201705/DfpDateTimesTest.php
index bf369f5ac..f5435f667 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201705/DfpDateTimesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201705/DfpDateTimesTest.php
@@ -20,7 +20,7 @@
 use DateTimeZone;
 use Google\AdsApi\Dfp\v201705\Date;
 use Google\AdsApi\Dfp\v201705\DateTime as DfpDateTime;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDateTimes`.
@@ -28,7 +28,7 @@
  * @see DfpDateTimes
  * @small
  */
-class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
+class DfpDateTimesTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'America/New_York';
   const TIME_ZONE_ID2 = 'PST8PDT';
@@ -50,7 +50,7 @@ class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
   private $stringDateTimeWithTimeZone3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDateTime1 = '1983-06-02T08:30:15';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201705/DfpDatesTest.php b/tests/Google/AdsApi/Dfp/Util/v201705/DfpDatesTest.php
index 308de604c..214f35116 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201705/DfpDatesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201705/DfpDatesTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp\Util\v201705;
 
 use Google\AdsApi\Dfp\v201705\Date;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDates`.
@@ -25,7 +25,7 @@
  * @see DfpDates
  * @group small
  */
-class DfpDatesTest extends PHPUnit_Framework_TestCase {
+class DfpDatesTest extends TestCase {
 
   private $dfpDate1;
   private $dfpDate2;
@@ -36,7 +36,7 @@ class DfpDatesTest extends PHPUnit_Framework_TestCase {
   private $stringDate3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDate1 = '1983-06-02';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201705/PqlTest.php b/tests/Google/AdsApi/Dfp/Util/v201705/PqlTest.php
index f41f18fca..e2b881cba 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201705/PqlTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201705/PqlTest.php
@@ -32,7 +32,7 @@
 use Google\AdsApi\Dfp\v201705\TargetingValue;
 use Google\AdsApi\Dfp\v201705\TextValue;
 use Google\AdsApi\Dfp\v201705\Value;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `Pql`.
@@ -40,7 +40,7 @@
  * @see Pql
  * @small
  */
-class PqlTest extends PHPUnit_Framework_TestCase {
+class PqlTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'Asia/Shanghai';
 
@@ -68,7 +68,7 @@ class PqlTest extends PHPUnit_Framework_TestCase {
   private $targeting1;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->column1 = new ColumnType('Id');
diff --git a/tests/Google/AdsApi/Dfp/Util/v201705/ReportDownloaderTest.php b/tests/Google/AdsApi/Dfp/Util/v201705/ReportDownloaderTest.php
index dd1a9384e..21ae01a0b 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201705/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201705/ReportDownloaderTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -36,13 +36,13 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $dfpSession;
   private $reportServiceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/Dfp/Util/v201705/StatementBuilderTest.php b/tests/Google/AdsApi/Dfp/Util/v201705/StatementBuilderTest.php
index f38321a60..d1ca94e27 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201705/StatementBuilderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201705/StatementBuilderTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Dfp\Util\v201705;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `StatementBuilder`.
@@ -24,7 +24,7 @@
  * @see StatementBuilder
  * @small
  */
-class StatementBuilderTest extends PHPUnit_Framework_TestCase {
+class StatementBuilderTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Dfp\Util\v201705\StatementBuilder::toStatement
diff --git a/tests/Google/AdsApi/Dfp/Util/v201708/DfpDateTimesTest.php b/tests/Google/AdsApi/Dfp/Util/v201708/DfpDateTimesTest.php
index 09c3a7bc7..8377f17d9 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201708/DfpDateTimesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201708/DfpDateTimesTest.php
@@ -20,7 +20,7 @@
 use DateTimeZone;
 use Google\AdsApi\Dfp\v201708\Date;
 use Google\AdsApi\Dfp\v201708\DateTime as DfpDateTime;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDateTimes`.
@@ -28,7 +28,7 @@
  * @see DfpDateTimes
  * @small
  */
-class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
+class DfpDateTimesTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'America/New_York';
   const TIME_ZONE_ID2 = 'PST8PDT';
@@ -50,7 +50,7 @@ class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
   private $stringDateTimeWithTimeZone3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDateTime1 = '1983-06-02T08:30:15';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201708/DfpDatesTest.php b/tests/Google/AdsApi/Dfp/Util/v201708/DfpDatesTest.php
index 064431f19..517139afb 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201708/DfpDatesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201708/DfpDatesTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp\Util\v201708;
 
 use Google\AdsApi\Dfp\v201708\Date;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDates`.
@@ -25,7 +25,7 @@
  * @see DfpDates
  * @group small
  */
-class DfpDatesTest extends PHPUnit_Framework_TestCase {
+class DfpDatesTest extends TestCase {
 
   private $dfpDate1;
   private $dfpDate2;
@@ -36,7 +36,7 @@ class DfpDatesTest extends PHPUnit_Framework_TestCase {
   private $stringDate3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDate1 = '1983-06-02';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201708/PqlTest.php b/tests/Google/AdsApi/Dfp/Util/v201708/PqlTest.php
index 0800dd5ba..598eeb45c 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201708/PqlTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201708/PqlTest.php
@@ -32,7 +32,7 @@
 use Google\AdsApi\Dfp\v201708\TargetingValue;
 use Google\AdsApi\Dfp\v201708\TextValue;
 use Google\AdsApi\Dfp\v201708\Value;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `Pql`.
@@ -40,7 +40,7 @@
  * @see Pql
  * @small
  */
-class PqlTest extends PHPUnit_Framework_TestCase {
+class PqlTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'Asia/Shanghai';
 
@@ -68,7 +68,7 @@ class PqlTest extends PHPUnit_Framework_TestCase {
   private $targeting1;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->column1 = new ColumnType('Id');
diff --git a/tests/Google/AdsApi/Dfp/Util/v201708/ReportDownloaderTest.php b/tests/Google/AdsApi/Dfp/Util/v201708/ReportDownloaderTest.php
index d6c040f8a..6e2fd0fa2 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201708/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201708/ReportDownloaderTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -36,13 +36,13 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $dfpSession;
   private $reportServiceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/Dfp/Util/v201708/StatementBuilderTest.php b/tests/Google/AdsApi/Dfp/Util/v201708/StatementBuilderTest.php
index c3c2d1d1f..aa6c218c5 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201708/StatementBuilderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201708/StatementBuilderTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Dfp\Util\v201708;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `StatementBuilder`.
@@ -24,7 +24,7 @@
  * @see StatementBuilder
  * @small
  */
-class StatementBuilderTest extends PHPUnit_Framework_TestCase {
+class StatementBuilderTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Dfp\Util\v201708\StatementBuilder::toStatement
diff --git a/tests/Google/AdsApi/Dfp/Util/v201711/DfpDateTimesTest.php b/tests/Google/AdsApi/Dfp/Util/v201711/DfpDateTimesTest.php
index 3aeea0ac5..d95f301e9 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201711/DfpDateTimesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201711/DfpDateTimesTest.php
@@ -20,7 +20,7 @@
 use DateTimeZone;
 use Google\AdsApi\Dfp\v201711\Date;
 use Google\AdsApi\Dfp\v201711\DateTime as DfpDateTime;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDateTimes`.
@@ -28,7 +28,7 @@
  * @see DfpDateTimes
  * @small
  */
-class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
+class DfpDateTimesTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'America/New_York';
   const TIME_ZONE_ID2 = 'PST8PDT';
@@ -50,7 +50,7 @@ class DfpDateTimesTest extends PHPUnit_Framework_TestCase {
   private $stringDateTimeWithTimeZone3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDateTime1 = '1983-06-02T08:30:15';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201711/DfpDatesTest.php b/tests/Google/AdsApi/Dfp/Util/v201711/DfpDatesTest.php
index 7271fbb83..a81cbe362 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201711/DfpDatesTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201711/DfpDatesTest.php
@@ -17,7 +17,7 @@
 namespace Google\AdsApi\Dfp\Util\v201711;
 
 use Google\AdsApi\Dfp\v201711\Date;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `DfpDates`.
@@ -25,7 +25,7 @@
  * @see DfpDates
  * @group small
  */
-class DfpDatesTest extends PHPUnit_Framework_TestCase {
+class DfpDatesTest extends TestCase {
 
   private $dfpDate1;
   private $dfpDate2;
@@ -36,7 +36,7 @@ class DfpDatesTest extends PHPUnit_Framework_TestCase {
   private $stringDate3;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->stringDate1 = '1983-06-02';
diff --git a/tests/Google/AdsApi/Dfp/Util/v201711/PqlTest.php b/tests/Google/AdsApi/Dfp/Util/v201711/PqlTest.php
index 20287e003..cfa960c49 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201711/PqlTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201711/PqlTest.php
@@ -32,7 +32,7 @@
 use Google\AdsApi\Dfp\v201711\TargetingValue;
 use Google\AdsApi\Dfp\v201711\TextValue;
 use Google\AdsApi\Dfp\v201711\Value;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `Pql`.
@@ -40,7 +40,7 @@
  * @see Pql
  * @small
  */
-class PqlTest extends PHPUnit_Framework_TestCase {
+class PqlTest extends TestCase {
 
   const TIME_ZONE_ID1 = 'Asia/Shanghai';
 
@@ -68,7 +68,7 @@ class PqlTest extends PHPUnit_Framework_TestCase {
   private $targeting1;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $this->column1 = new ColumnType('Id');
diff --git a/tests/Google/AdsApi/Dfp/Util/v201711/ReportDownloaderTest.php b/tests/Google/AdsApi/Dfp/Util/v201711/ReportDownloaderTest.php
index f35fb73fc..ff7a48aa1 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201711/ReportDownloaderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201711/ReportDownloaderTest.php
@@ -28,7 +28,7 @@
 use GuzzleHttp\Psr7\Response;
 use Monolog\Handler\NullHandler;
 use Monolog\Logger;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for `ReportDownloader`.
@@ -36,13 +36,13 @@
  * @see ReportDownloader
  * @small
  */
-class ReportDownloaderTest extends PHPUnit_Framework_TestCase {
+class ReportDownloaderTest extends TestCase {
 
   private $dfpSession;
   private $reportServiceMock;
 
   /**
-   * @see PHPUnit_Framework_TestCase::setUp
+   * @see PHPUnit\Framework\TestCase::setUp
    */
   protected function setUp() {
     $fetchAuthTokenInterfaceStub = $this
diff --git a/tests/Google/AdsApi/Dfp/Util/v201711/StatementBuilderTest.php b/tests/Google/AdsApi/Dfp/Util/v201711/StatementBuilderTest.php
index 8de2fb394..066e38b16 100755
--- a/tests/Google/AdsApi/Dfp/Util/v201711/StatementBuilderTest.php
+++ b/tests/Google/AdsApi/Dfp/Util/v201711/StatementBuilderTest.php
@@ -16,7 +16,7 @@
  */
 namespace Google\AdsApi\Dfp\Util\v201711;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for `StatementBuilder`.
@@ -24,7 +24,7 @@
  * @see StatementBuilder
  * @small
  */
-class StatementBuilderTest extends PHPUnit_Framework_TestCase {
+class StatementBuilderTest extends TestCase {
 
   /**
    * @covers Google\AdsApi\Dfp\Util\v201711\StatementBuilder::toStatement