diff --git a/packages/php/email-editor/tests/integration/Engine/Templates/Template_Preview_Test.php b/packages/php/email-editor/tests/integration/Engine/Templates/Template_Preview_Test.php
new file mode 100644
index 0000000000..18559a3ecb
--- /dev/null
+++ b/packages/php/email-editor/tests/integration/Engine/Templates/Template_Preview_Test.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * This file is part of the MailPoet plugin.
+ *
+ * @package MailPoet\EmailEditor
+ */
+
+declare(strict_types = 1);
+namespace MailPoet\EmailEditor\Engine\Templates;
+
+/**
+ * Integration test for the Template Preview class
+ */
+class Template_Preview_Test extends \MailPoetTest {
+	/**
+	 * Template preview.
+	 *
+	 * @var Template_Preview
+	 */
+	private Template_Preview $template_preview;
+
+	/**
+	 * Set up before each test
+	 */
+	public function _before() {
+		parent::_before();
+		$this->template_preview = $this->di_container->get( Template_Preview::class );
+	}
+
+	/**
+	 * Test it Generates CSS for preview of email theme
+	 *
+	 * @return void
+	 */
+	public function testItCanGetThemePreviewCss(): void {
+		$template_id = 'mailpoet/mailpoet//simple-light';
+		$result      = $this->template_preview->get_email_theme_preview_css(
+			array(
+				'id'    => $template_id,
+				'wp_id' => null,
+			)
+		);
+
+		verify( $result )->stringContainsString( 'Styles for the email editor.' );
+		verify( $result )->stringContainsString( 'is-layout-email-flex' );
+		verify( $result )->stringContainsString( '.is-root-container { width: 660px; margin: 0 auto; }' ); // Styles for both the email editor and renderer.
+	}
+}
diff --git a/packages/php/email-editor/tests/integration/Engine/Templates/Templates_Test.php b/packages/php/email-editor/tests/integration/Engine/Templates/Templates_Test.php
new file mode 100644
index 0000000000..695a30ba98
--- /dev/null
+++ b/packages/php/email-editor/tests/integration/Engine/Templates/Templates_Test.php
@@ -0,0 +1,96 @@
+<?php
+/**
+ * This file is part of the MailPoet plugin.
+ *
+ * @package MailPoet\EmailEditor
+ */
+
+declare(strict_types = 1);
+namespace MailPoet\EmailEditor\Engine\Templates;
+
+/**
+ * Integration test for the Templates class
+ */
+class Templates_Test extends \MailPoetTest {
+
+	/**
+	 * Templates.
+	 *
+	 * @var Templates
+	 */
+	private Templates $templates;
+
+	/**
+	 * Set up before each test
+	 */
+	public function _before() {
+		parent::_before();
+		$this->templates = $this->di_container->get( Templates::class );
+		$this->templates->initialize();
+	}
+
+	/**
+	 * Test it can fetch block template
+	 *
+	 * @return void
+	 */
+	public function testItCanFetchBlockTemplate(): void {
+		$template_id = 'mailpoet/mailpoet//email-general';
+		$template    = $this->templates->get_block_template( $template_id );
+
+		verify( $template->slug )->equals( 'email-general' );
+		verify( $template->id )->equals( 'mailpoet/mailpoet//email-general' );
+		verify( $template->title )->equals( 'General Email' );
+		verify( $template->description )->equals( 'A general template for emails.' );
+	}
+
+	/**
+	 * Test is can fetch template theme
+	 *
+	 * @return void
+	 */
+	public function testItCanFetchTemplateTheme(): void {
+		$template_id = 'mailpoet/mailpoet//simple-light';
+		$theme       = $this->templates->get_block_template_theme( $template_id );
+
+		verify( $theme )->arrayCount( 2 );
+		verify( $theme['styles'] )->isArray();
+		verify( $theme['styles']['spacing'] )->isArray();
+		verify( $theme['styles']['spacing']['blockGap'] )->equals( '10px' );
+	}
+
+	/**
+	 * Test it can add block templates
+	 *
+	 * @return void
+	 */
+	public function testItCanAddBlockTemplates(): void {
+		$result = $this->templates->add_block_templates( array(), array( 'post_type' => 'mailpoet_email' ), 'wp_template' );
+
+		verify( $result )->arrayCount( 2 );
+		verify( $result[0]->content )->notEmpty();
+		verify( $result[1]->content )->notEmpty();
+	}
+
+	/**
+	 * Test it can add and update block template details.
+	 *
+	 * @return void
+	 */
+	public function testItCanAddBlockTemplateDetails(): void {
+		// add_block_template_details.
+		$basic_template       = new \WP_Block_Template();
+		$basic_template->slug = 'simple-light';
+
+		// confirm it has no title or description.
+		verify( $basic_template->title )->equals( '' );
+		verify( $basic_template->description )->equals( '' );
+
+		$result = $this->templates->add_block_template_details( $basic_template );
+
+		// confirm template was updated.
+		verify( $basic_template->title )->equals( 'Simple Light' );
+		verify( $basic_template->description )->equals( 'A basic template with header and footer.' );
+		verify( $result )->equals( $basic_template );
+	}
+}