diff --git a/composer.json b/composer.json
index b093f30..a4a4c32 100644
--- a/composer.json
+++ b/composer.json
@@ -38,6 +38,7 @@
         "fix": "@fix:phpcbf",
         "fix:phpcbf": "phpcbf src tests",
         "test": "phpunit",
+        "test:unit": "phpunit --testsuite unit",
         "test:integration": "phpunit --testsuite integration"
     },
     "suggest": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 948d6db..60f9815 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -11,6 +11,9 @@
         <testsuite name="integration">
             <directory>tests/Integration</directory>
         </testsuite>
+        <testsuite name="unit">
+            <directory>tests/Unit</directory>
+        </testsuite>
     </testsuites>
     <source>
         <include>
diff --git a/phpunit9.xml.dist b/phpunit9.xml.dist
index cedb15c..3c4802e 100644
--- a/phpunit9.xml.dist
+++ b/phpunit9.xml.dist
@@ -14,6 +14,9 @@
         <testsuite name="integration">
             <directory>tests/Integration</directory>
         </testsuite>
+        <testsuite name="unit">
+            <directory>tests/Unit</directory>
+        </testsuite>
     </testsuites>
     <coverage>
         <include>
diff --git a/src/Symfony/ResponseAssertions.php b/src/Symfony/ResponseAssertions.php
index 4004e48..256be2d 100644
--- a/src/Symfony/ResponseAssertions.php
+++ b/src/Symfony/ResponseAssertions.php
@@ -5,11 +5,15 @@
 namespace DR\PHPUnitExtensions\Symfony;
 
 use PHPUnit\Framework\Assert;
+use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Response;
 
 trait ResponseAssertions
 {
-    protected static function assertJsonResponse(array $expected, Response $response): void
+    /**
+     * @param mixed[] $expected
+     */
+    protected static function assertJsonResponse(array $expected, JsonResponse $response): void
     {
         Assert::assertNotFalse($response->getContent());
 
diff --git a/tests/Unit/Symfony/ResponseAssertionsTest.php b/tests/Unit/Symfony/ResponseAssertionsTest.php
new file mode 100644
index 0000000..8f1b77a
--- /dev/null
+++ b/tests/Unit/Symfony/ResponseAssertionsTest.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DR\PHPUnitExtensions\Tests\Unit\Symfony;
+
+use DR\PHPUnitExtensions\Symfony\ResponseAssertions;
+use PHPUnit\Framework\AssertionFailedError;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+#[CoversClass(ResponseAssertions::class)]
+class ResponseAssertionsTest extends TestCase
+{
+    use ResponseAssertions;
+
+    public function testAssertJsonResponse(): void
+    {
+        $expected = ['foo' => 'bar'];
+        $response = new JsonResponse($expected);
+
+        self::assertJsonResponse($expected, $response);
+    }
+
+    public function testAssertJsonResponseFails(): void
+    {
+        $expected = ['foo' => 'bar'];
+        $response = new JsonResponse(['bar' => 'foo']);
+
+        $this->expectException(AssertionFailedError::class);
+        $this->expectExceptionMessage('Failed asserting that two arrays are identical.');
+        self::assertJsonResponse($expected, $response);
+    }
+
+    public function testAssertJsonResponseFalse(): void
+    {
+        $expected = ['foo' => 'bar'];
+        $response = new JsonResponse(false);
+
+        $this->expectException(AssertionFailedError::class);
+        $this->expectExceptionMessage('Failed asserting that false is identical to Array');
+        self::assertJsonResponse($expected, $response);
+    }
+}