diff --git a/src/Twigc/PharCompiler.php b/src/Twigc/PharCompiler.php
index 5bb450a..681fbc7 100644
--- a/src/Twigc/PharCompiler.php
+++ b/src/Twigc/PharCompiler.php
@@ -370,8 +370,7 @@ class PharCompiler {
 			->exclude('docs')
 			->exclude('test')
 			->exclude('tests')
-			->exclude('Test')
-			->exclude('Tests')
+			->notPath('/^[^\/]+\/[^\/]+\/Tests?\//')
 			->notName('*.c')
 			->notName('*.h')
 			->notName('*.m4')