diff --git a/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php b/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
index e06b9a056a727..a77f97ea002ac 100644
--- a/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
@@ -56,7 +56,7 @@ public function getKernel(): KernelInterface
      */
     public function getProfile(): HttpProfile|false|null
     {
-        if (null === $this->response || !$this->getContainer()->has('profiler')) {
+        if (!isset($this->response) || !$this->getContainer()->has('profiler')) {
             return false;
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/KernelBrowserTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/KernelBrowserTest.php
index 1e462f7d0a8f6..4e62b5ee7b6f4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/KernelBrowserTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/KernelBrowserTest.php
@@ -14,6 +14,7 @@
 use Symfony\Bundle\FrameworkBundle\KernelBrowser;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\AbstractWebTestCase;
 use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\KernelInterface;
 
 class KernelBrowserTest extends AbstractWebTestCase
 {
@@ -61,6 +62,13 @@ public function testRequestAfterKernelShutdownAndPerformedRequest()
         $client->request('GET', '/');
     }
 
+    public function testGetProfileWithoutRequest()
+    {
+        $browser = new KernelBrowser($this->createMock(KernelInterface::class));
+
+        $this->assertFalse($browser->getProfile());
+    }
+
     private function getKernelMock()
     {
         $mock = $this->getMockBuilder($this->getKernelClass())
diff --git a/src/Symfony/Component/BrowserKit/AbstractBrowser.php b/src/Symfony/Component/BrowserKit/AbstractBrowser.php
index 69c2032b92d74..6ba9f488a005f 100644
--- a/src/Symfony/Component/BrowserKit/AbstractBrowser.php
+++ b/src/Symfony/Component/BrowserKit/AbstractBrowser.php
@@ -531,7 +531,7 @@ public function reload(): Crawler
      */
     public function followRedirect(): Crawler
     {
-        if (!$this->redirect) {
+        if (!isset($this->redirect)) {
             throw new LogicException('The request was not redirected.');
         }
 
diff --git a/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php b/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
index 2267fca448799..ca822e245d6ef 100644
--- a/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php
@@ -15,6 +15,7 @@
 use Symfony\Component\BrowserKit\CookieJar;
 use Symfony\Component\BrowserKit\Exception\BadMethodCallException;
 use Symfony\Component\BrowserKit\Exception\InvalidArgumentException;
+use Symfony\Component\BrowserKit\Exception\LogicException;
 use Symfony\Component\BrowserKit\History;
 use Symfony\Component\BrowserKit\Request;
 use Symfony\Component\BrowserKit\Response;
@@ -889,4 +890,14 @@ public function testInternalRequestNull()
 
         $client->getInternalRequest();
     }
+
+    public function testFollowRedirectWithoutRequest()
+    {
+        $browser = $this->getBrowser();
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage('The request was not redirected.');
+
+        $browser->followRedirect();
+    }
 }