Add withoutExceptionHandling method for testing.

src/Illuminate/Foundation/Testing/Concerns/InteractsWithExceptionHandling.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Illuminate\Foundation\Testing\Concerns;
+
+use Exception;
+use Illuminate\Contracts\Debug\ExceptionHandler;
+use Symfony\Component\Console\Application as ConsoleApplication;
+
+trait InteractsWithExceptionHandling
+{
+    /**
+     * The previous exception handler.
+     *
+     * @var ExceptionHandler|null
+     */
+    protected $previousExceptionHandler;
+
+    /**
+     * Restore exception handling.
+     *
+     * @return $this
+     */
+    protected function withExceptionHandling()
+    {
+        if ($this->previousExceptionHandler) {
+            $this->app->instance(ExceptionHandler::class, $this->previousExceptionHandler);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Disable exception handling for the test.
+     *
+     * @return $this
+     */
+    protected function withoutExceptionHandling()
+    {
+        $this->previousExceptionHandler = app(ExceptionHandler::class);
+
+        $this->app->instance(ExceptionHandler::class, new class implements ExceptionHandler {
+            public function __construct() {}
+            public function report(Exception $e) {}
+            public function render($request, Exception $e) {
+                throw $e;
+            }
+            public function renderForConsole($output, Exception $e) {
+                (new ConsoleApplication)->renderException($e, $output);
+            }
+        });
+
+        return $this;
+    }
+}

src/Illuminate/Foundation/Testing/TestCase.php

@@ -15,6 +15,7 @@ abstract class TestCase extends BaseTestCase
         Concerns\InteractsWithAuthentication,
         Concerns\InteractsWithConsole,
         Concerns\InteractsWithDatabase,
+        Concerns\InteractsWithExceptionHandling,
         Concerns\InteractsWithSession,
         Concerns\MocksApplicationServices;