diff --git a/tests/src/Functional/DefaultOgImageTest.php b/tests/src/Functional/DefaultOgImageTest.php
new file mode 100644
index 000000000..e69d634f7
--- /dev/null
+++ b/tests/src/Functional/DefaultOgImageTest.php
@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\helfi_platform_config\Functional;
+
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests default og image.
+ */
+class DefaultOgImageTest extends BrowserTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'language',
+    'helfi_platform_config',
+    'helfi_image_styles',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp() : void {
+    parent::setUp();
+    foreach (['fi', 'sv'] as $langcode) {
+      ConfigurableLanguage::createFromLangcode($langcode)->save();
+    }
+  }
+
+  /**
+   * Tests [site:shareable-image] token.
+   */
+  public function testDefaultOgImage() : void {
+    /** @var \Drupal\Core\Utility\Token $token_service */
+    $token_service = $this->container->get('token');
+
+    /** @var \Drupal\language\ConfigurableLanguageManagerInterface $language_manager */
+    $language_manager = $this->container->get('language_manager');
+
+    foreach (['fi', 'sv'] as $langcode) {
+      // Set content language.
+      $language_manager->setCurrentLanguage(
+        $language_manager->getLanguage($langcode),
+        LanguageInterface::TYPE_CONTENT,
+      );
+
+      $og_image_url = $token_service->replace('[site:shareable-image]');
+
+      $this->drupalGet($og_image_url);
+
+      // Image should exist.
+      $this->assertSession()->statusCodeEquals(200);
+    }
+  }
+
+}
diff --git a/tests/src/Kernel/OgImageManagerTest.php b/tests/src/Kernel/OgImageManagerTest.php
new file mode 100644
index 000000000..65b80929a
--- /dev/null
+++ b/tests/src/Kernel/OgImageManagerTest.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Drupal\Tests\helfi_platform_config\Kernel;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\helfi_platform_config\Token\OGImageBuilderInterface;
+use Drupal\KernelTests\KernelTestBase;
+use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
+
+/**
+ * Tests DefaultImageBuilder.
+ *
+ * @group helfi_api_base
+ */
+class OgImageManagerTest extends KernelTestBase {
+
+  use ProphecyTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'system',
+    'user',
+    'image',
+    'responsive_image',
+    'image_style_quality',
+    'breakpoint',
+    'crop',
+    'focal_point',
+    'config_rewrite',
+    'helfi_platform_config',
+    'helfi_image_styles',
+  ];
+
+  /**
+   * {@inheritDoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+
+    $this->installEntitySchema('user');
+    $this->installEntitySchema('crop');
+    $this->installConfig(['system', 'helfi_image_styles']);
+  }
+
+  /**
+   * Tests that images are processed through og_image image style.
+   */
+  public function testImageStyle() : void {
+    $og_image_manager = $this->container->get('helfi_platform_config.og_image_manager');
+
+    // Add builder that always overwrites the result.
+    $builder = $this->prophesize(OGImageBuilderInterface::class);
+    $builder->applies(Argument::any())->willReturn(TRUE);
+    $builder->buildUri(Argument::any())->willReturn('public://my-image.jpg');
+    $og_image_manager->add($builder->reveal(), 9999999);
+
+    $entity = $this->prophesize(EntityInterface::class);
+    $og_image_url = $og_image_manager->buildUrl($entity->reveal());
+
+    // Assert that og_image image style was used.
+    $this->assertStringContainsString('/styles/og_image/', $og_image_url);
+    $this->assertStringContainsString('my-image.jpg', $og_image_url);
+  }
+
+}
diff --git a/tests/src/Unit/OGImageManagerTest.php b/tests/src/Unit/OGImageManagerTest.php
new file mode 100644
index 000000000..30119e67b
--- /dev/null
+++ b/tests/src/Unit/OGImageManagerTest.php
@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\helfi_platform_config\Unit;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\File\FileUrlGeneratorInterface;
+use Drupal\helfi_platform_config\Token\OGImageBuilderInterface;
+use Drupal\helfi_platform_config\Token\OGImageManager;
+use Drupal\Tests\token\Kernel\UnitTest;
+use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Prophecy\Prophecy\ObjectProphecy;
+
+/**
+ * Tests og image builder collector.
+ *
+ * @coversDefaultClass \Drupal\helfi_platform_config\Token\OGImageManager
+ * @group helfi_platform_config
+ */
+class OGImageManagerTest extends UnitTest {
+
+  use ProphecyTrait;
+
+  /**
+   * Tests builder.
+   *
+   * @covers ::buildUrl
+   * @covers ::add
+   * @covers ::getBuilders
+   */
+  public function testBuildUrl() : void {
+    $sut = $this->getSut();
+    $entity = $this->prophesize(EntityInterface::class)->reveal();
+
+    // First builder does not apply.
+    $sut->add($this->createImageBuilderMock('https://1', FALSE)->reveal());
+    $this->assertEquals(NULL, $sut->buildUrl($entity));
+
+    // Second builder applies but returns NULL.
+    $sut->add($this->createImageBuilderMock(NULL)->reveal());
+    $this->assertEquals(NULL, $sut->buildUrl($entity));
+
+    // Third builder applies, priority is lower.
+    $sut->add($this->createImageBuilderMock('https://3')->reveal(), -10);
+    $this->assertEquals('https://3', $sut->buildUrl($entity));
+
+    // Builder with the lowers priority gets overwritten by '3'.
+    $builder4 = $this->createImageBuilderMock('https://4');
+    $sut->add($builder4->reveal(), -100);
+    $this->assertEquals('https://3', $sut->buildUrl($entity));
+    $builder4->buildUri(Argument::any())->shouldHaveBeenCalled();
+  }
+
+  /**
+   * Gets service under test.
+   *
+   * @param \Drupal\Core\File\FileUrlGeneratorInterface|null $fileUrlGenerator
+   *   File url generator mock.
+   *
+   * @returns \Drupal\helfi_platform_config\Token\OGImageManager
+   *   The open graph image manager.
+   */
+  private function getSut(?FileUrlGeneratorInterface $fileUrlGenerator = NULL) : OGImageManager {
+    $moduleHandler = $this->prophesize(ModuleHandlerInterface::class);
+
+    if (!$fileUrlGenerator) {
+      $prophecy = $this->prophesize(FileUrlGeneratorInterface::class);
+      $prophecy->generateAbsoluteString(Argument::any())->willReturnArgument(0);
+      $fileUrlGenerator = $prophecy->reveal();
+    }
+
+    return new OGImageManager(
+      $moduleHandler->reveal(),
+      $fileUrlGenerator,
+    );
+  }
+
+  /**
+   * Creates mock image builder.
+   *
+   * @param string|null $url
+   *   Return value for buildUrl().
+   * @param bool $applies
+   *   Return value for applies().
+   *
+   * @return \Drupal\helfi_platform_config\Token\OGImageBuilderInterface|\Prophecy\Prophecy\ObjectProphecy
+   *   Builder mock.
+   */
+  private function createImageBuilderMock(?string $url, bool $applies = TRUE) : OGImageBuilderInterface|ObjectProphecy {
+    $builder = $this->prophesize(OGImageBuilderInterface::class);
+    $builder->applies(Argument::any())->willReturn($applies);
+    $builder->buildUri(Argument::any())->willReturn($url);
+    return $builder;
+  }
+
+}