Update phpunit config

phpunit.xml.dist

@@ -1,18 +1,28 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit backupGlobals="false"
          backupStaticAttributes="false"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         beStrictAboutOutputDuringTests="true"
          bootstrap="vendor/autoload.php"
          colors="true"
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
+         failOnRisky="true"
+         failOnWarning="true"
          processIsolation="false"
+         stopOnError="false"
          stopOnFailure="false"
-         syntaxCheck="false"
+         verbose="true"
 >
     <testsuites>
         <testsuite name="Laravel Searchy Test Suite">
-            <directory suffix=".php">./tests/</directory>
+            <directory suffix="Test.php">./tests</directory>
         </testsuite>
     </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+        </whitelist>
+    </filter>
 </phpunit>