diff --git a/tests/CashierTest.php b/tests/CashierTest.php
index d44a6ae8..784bfaec 100644
--- a/tests/CashierTest.php
+++ b/tests/CashierTest.php
@@ -7,7 +7,6 @@
 use Carbon\Carbon;
 use Illuminate\Http\Request;
 use Laravel\Cashier\Billable;
-use PHPUnit\Framework\TestCase;
 use Illuminate\Database\Schema\Builder;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\ConnectionInterface;
@@ -19,6 +18,8 @@ class CashierTest extends TestCase
 {
     public function setUp()
     {
+        parent::setUp();
+
         Eloquent::unguard();
 
         $db = new DB;
diff --git a/tests/TestCase.php b/tests/TestCase.php
new file mode 100644
index 00000000..df358e93
--- /dev/null
+++ b/tests/TestCase.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Laravel\Cashier\Tests;
+
+use Stripe\Stripe;
+use PHPUnit\Framework\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    protected function setUp()
+    {
+        Stripe::setApiVersion('2018-11-08');
+    }
+}
diff --git a/tests/VerifyWebhookSignatureTest.php b/tests/VerifyWebhookSignatureTest.php
index e8323470..6ffc1a00 100644
--- a/tests/VerifyWebhookSignatureTest.php
+++ b/tests/VerifyWebhookSignatureTest.php
@@ -4,7 +4,6 @@
 
 use Mockery as m;
 use Illuminate\Http\Request;
-use PHPUnit\Framework\TestCase;
 use Illuminate\Contracts\Foundation\Application;
 use Illuminate\Contracts\Config\Repository as Config;
 use Symfony\Component\HttpKernel\Exception\HttpException;
diff --git a/tests/WebhookControllerTest.php b/tests/WebhookControllerTest.php
index 0a9c0c74..c45d1250 100644
--- a/tests/WebhookControllerTest.php
+++ b/tests/WebhookControllerTest.php
@@ -3,7 +3,6 @@
 namespace Laravel\Cashier\Tests;
 
 use Illuminate\Http\Request;
-use PHPUnit\Framework\TestCase;
 use Laravel\Cashier\Http\Controllers\WebhookController;
 
 class WebhookControllerTest extends TestCase