diff --git a/core/testcase.php b/core/testcase.php
index f7cff2a0f..373befb31 100644
--- a/core/testcase.php
+++ b/core/testcase.php
@@ -4,7 +4,7 @@
 
 namespace Shimmie2;
 
-if (class_exists("\\PHPUnit\\Framework\\TestCase")) {
+try {
     abstract class ShimmiePHPUnitTestCase extends \PHPUnit\Framework\TestCase
     {
         protected static string $anon_name = "anonymous";
@@ -289,7 +289,9 @@ protected function delete_image(int $image_id): void
             }
         }
     }
-} else {
+}
+// @phpstan-ignore-next-line
+catch (\Throwable $e) {
     abstract class ShimmiePHPUnitTestCase
     {
     }