diff --git a/tests/lib/MVC/Symfony/Component/Serializer/CompoundMatcherNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/CompoundMatcherNormalizerTest.php
index 9388725b48..f496e68738 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/CompoundMatcherNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/CompoundMatcherNormalizerTest.php
@@ -15,20 +15,30 @@
 use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\MatcherStub;
 use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class CompoundMatcherNormalizerTest extends TestCase
 {
     public function testNormalization(): void
     {
         $matcher = new CompoundStub([]);
-        $matcher->setSubMatchers([
-            'foo' => new MatcherStub('foo'),
-            'bar' => new MatcherStub('bar'),
-            'baz' => new MatcherStub('baz'),
-        ]);
+        $matcher->setSubMatchers(
+            [
+                'foo' => new MatcherStub('foo'),
+                'bar' => new MatcherStub('bar'),
+                'baz' => new MatcherStub('baz'),
+            ]
+        );
 
         $normalizer = new CompoundMatcherNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new SerializerStub(),
+                new ObjectNormalizer(),
+            ]
+        );
 
         self::assertEquals(
             [
@@ -40,7 +50,7 @@ public function testNormalization(): void
                 'config' => [],
                 'matchersMap' => [],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
@@ -52,6 +62,9 @@ public function testSupportsNormalization(): void
         self::assertFalse($normalizer->supportsNormalization($this->createMock(Matcher::class)));
     }
 
+    /**
+     * @throws \JsonException
+     */
     public function testSupportsDenormalization(): void
     {
         $normalizer = new CompoundMatcherNormalizer();
@@ -63,7 +76,8 @@ public function testSupportsDenormalization(): void
                 ],
                 'config' => [],
                 'matchersMap' => [],
-            ]
+            ],
+            JSON_THROW_ON_ERROR
         );
 
         self::assertTrue($normalizer->supportsDenormalization($data, Compound::class, 'json'));
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/HostElementNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/HostElementNormalizerTest.php
index 6821ad5e24..8f2ace75c3 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/HostElementNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/HostElementNormalizerTest.php
@@ -12,15 +12,24 @@
 use Ibexa\Core\MVC\Symfony\Routing\SimplifiedRequest;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\HostElement;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
+/**
+ * @covers \Ibexa\Core\MVC\Symfony\Component\Serializer\HostElementNormalizer
+ */
 final class HostElementNormalizerTest extends TestCase
 {
     public function testNormalization(): void
     {
         $normalizer = new HostElementNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new HostElement(2);
         // Set request and invoke match to initialize HostElement::$hostElements
@@ -35,7 +44,7 @@ public function testNormalization(): void
                     'dev',
                 ],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/HostTextNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/HostTextNormalizerTest.php
index 6f34cf217f..599f0876f6 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/HostTextNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/HostTextNormalizerTest.php
@@ -11,15 +11,21 @@
 use Ibexa\Core\MVC\Symfony\Component\Serializer\HostTextNormalizer;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\HostText;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use Ibexa\Tests\Core\Search\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class HostTextNormalizerTest extends TestCase
 {
     public function testNormalize(): void
     {
         $normalizer = new HostTextNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new HostText([
             'prefix' => 'foo',
@@ -33,7 +39,7 @@ public function testNormalize(): void
                     'suffix' => 'bar',
                 ],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/RegexHostNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/RegexHostNormalizerTest.php
index 978c74d60b..720a300081 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/RegexHostNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/RegexHostNormalizerTest.php
@@ -11,15 +11,21 @@
 use Ibexa\Core\MVC\Symfony\Component\Serializer\RegexHostNormalizer;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\Regex\Host;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use Ibexa\Tests\Core\Search\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class RegexHostNormalizerTest extends TestCase
 {
     public function testNormalize(): void
     {
         $normalizer = new RegexHostNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new Host([
             'regex' => '/^Foo(.*)/(.*)/',
@@ -33,7 +39,7 @@ public function testNormalize(): void
                     'itemNumber' => 2,
                 ],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/RegexURINormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/RegexURINormalizerTest.php
index acdef30d8f..2fa16c2e36 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/RegexURINormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/RegexURINormalizerTest.php
@@ -11,15 +11,21 @@
 use Ibexa\Core\MVC\Symfony\Component\Serializer\RegexURINormalizer;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\Regex\URI;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use Ibexa\Tests\Core\Search\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class RegexURINormalizerTest extends TestCase
 {
     public function testNormalize(): void
     {
         $normalizer = new RegexURINormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new URI([
             'regex' => '/^Foo(.*)/(.*)/',
@@ -33,7 +39,7 @@ public function testNormalize(): void
                     'itemNumber' => 2,
                 ],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/Stubs/SerializerStub.php b/tests/lib/MVC/Symfony/Component/Serializer/Stubs/SerializerStub.php
index 545e5c77ab..0da03526c4 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/Stubs/SerializerStub.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/Stubs/SerializerStub.php
@@ -45,6 +45,6 @@ public function normalize($object, string $format = null, array $context = []):
 
     public function supportsNormalization($data, string $format = null): bool
     {
-        return true;
+        return $data instanceof MatcherStub;
     }
 }
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/URIElementNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/URIElementNormalizerTest.php
index ee02ddd759..6607fa1901 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/URIElementNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/URIElementNormalizerTest.php
@@ -12,15 +12,21 @@
 use Ibexa\Core\MVC\Symfony\Routing\SimplifiedRequest;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\URIElement;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class URIElementNormalizerTest extends TestCase
 {
     public function testNormalization(): void
     {
         $normalizer = new URIElementNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new URIElement(2);
         // Set request and invoke match to initialize HostElement::$hostElements
@@ -32,7 +38,7 @@ public function testNormalization(): void
                 'elementNumber' => 2,
                 'uriElements' => ['foo', 'bar'],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }
 
diff --git a/tests/lib/MVC/Symfony/Component/Serializer/URITextNormalizerTest.php b/tests/lib/MVC/Symfony/Component/Serializer/URITextNormalizerTest.php
index e9940c4c23..e3ebe2fea9 100644
--- a/tests/lib/MVC/Symfony/Component/Serializer/URITextNormalizerTest.php
+++ b/tests/lib/MVC/Symfony/Component/Serializer/URITextNormalizerTest.php
@@ -11,15 +11,21 @@
 use Ibexa\Core\MVC\Symfony\Component\Serializer\URITextNormalizer;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher;
 use Ibexa\Core\MVC\Symfony\SiteAccess\Matcher\URIText;
-use Ibexa\Tests\Core\MVC\Symfony\Component\Serializer\Stubs\SerializerStub;
 use Ibexa\Tests\Core\Search\TestCase;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
 
 final class URITextNormalizerTest extends TestCase
 {
     public function testNormalize(): void
     {
         $normalizer = new URITextNormalizer();
-        $normalizer->setSerializer(new SerializerStub());
+        $serializer = new Serializer(
+            [
+                $normalizer,
+                new ObjectNormalizer(),
+            ]
+        );
 
         $matcher = new URIText([
             'prefix' => 'foo',
@@ -33,7 +39,7 @@ public function testNormalize(): void
                     'suffix' => 'bar',
                 ],
             ],
-            $normalizer->normalize($matcher)
+            $serializer->normalize($matcher)
         );
     }