diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 4911e50..8470c05 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,10 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    bootstrap="vendor/autoload.php"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+    bootstrap="vendor/autoload.php"
 >
-    <coverage/>
+
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">src</directory>
+        </include>
+    </coverage>
     <testsuites>
         <testsuite name="CBOR Test Suite">
             <directory>./tests/</directory>