--- ../tests/InterceptorTests.php	2026-07-11 00:18:06.848759320 +0300
+++ ../tests/InterceptorTests.php	2026-07-11 00:25:59.449600087 +0300
@@ -9,7 +9,6 @@
 
 use Nikic\IncludeInterceptor\FileFilter;
 use Nikic\IncludeInterceptor\Interceptor;
-use PHPUnit\Framework\Error\Warning;
 
 class InterceptorTests extends TestCase {
     public function testInterceptNoopHook() {
@@ -83,12 +82,32 @@
         });
         $instance->setUp();
 
+        $warnings = [];
+
+        set_error_handler(
+            static function (int $severity, string $message) use (&$warnings): bool {
+                if ($severity !== E_WARNING) {
+                    return false;
+                }
+
+                $warnings[] = $message;
+
+                return true;
+            }
+        );
+
         try {
-            $this->expectException(Warning::class);
             include __DIR__ . '/data/doesntExist.php';
         } finally {
+            restore_error_handler();
             $instance->tearDown();
         }
+
+        $this->assertNotNull($warnings);
+        $this->assertStringContainsString(
+            'Failed to open stream',
+            implode("\n", $warnings)
+        );
     }
 
     public function testDoubleSetup() {