diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index daeaf18a..603df99d 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -1,2 +1,9 @@
 <?php
 $loader = include __DIR__ . '/../vendor/autoload.php';
+
+$psr4TestCaseClass = 'PHPUnit\Framework\TestCase';
+$psr0TestCaseClass = 'PHPUnit_Framework_TestCase';
+
+if (!class_exists($psr0TestCaseClass) && class_exists($psr4TestCaseClass)) {
+    class_alias($psr4TestCaseClass, $psr0TestCaseClass);
+}
diff --git a/tests/phpunit.xml.dist b/tests/phpunit.xml.dist
index 6d9175c5..7bb902a5 100644
--- a/tests/phpunit.xml.dist
+++ b/tests/phpunit.xml.dist
@@ -6,7 +6,7 @@
     </testsuites>
     <filter>
         <whitelist>
-            <directory>..</directory>
+            <directory>../src</directory>
             <exclude>
                 <directory>../vendor/</directory>
             </exclude>