diff --git a/src/Support/Backtrace.php b/src/Support/Backtrace.php
index 0347932f..0e87e849 100644
--- a/src/Support/Backtrace.php
+++ b/src/Support/Backtrace.php
@@ -24,7 +24,7 @@ final class Backtrace
         $current = null;
 
         foreach (debug_backtrace() as $trace) {
-            if (Str::endsWith($trace[self::FILE], 'vendor/phpunit/phpunit/src/Util/FileLoader.php')) {
+            if (Str::endsWith($trace[self::FILE], realpath('vendor/phpunit/phpunit/src/Util/FileLoader.php'))) {
                 break;
             }