diff --git a/tests/data/sample-email.html b/tests/data/sample-email.html
new file mode 100644
index 00000000000..144b4c7b845
--- /dev/null
+++ b/tests/data/sample-email.html
@@ -0,0 +1,5 @@
+<!DOCTYPE html>
+<html>
+<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head>
+<body style="padding: 0;"><p class="text" style='color: #3c3c3c; font-family: "Helvetica Neue", Helvetica, Roboto, Arial, sans-serif;'>Hello World!</p></body>
+</html>
diff --git a/tests/unit-tests/email/emails.php b/tests/unit-tests/email/emails.php
new file mode 100644
index 00000000000..3525c0e7153
--- /dev/null
+++ b/tests/unit-tests/email/emails.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * Test for the email class.
+ * @package WooCommerce\Tests\Emails
+ */
+
+/**
+ * WC_Tests_WC_Emails.
+ *
+ * @covers \WC_Email
+ */
+class WC_Tests_WC_Emails extends WC_Unit_Test_Case {
+
+	/**
+	 * Setup tests.
+	 */
+	public function setUp() {
+		parent::setUp();
+
+		// Load email classes.
+		$emails = new WC_Emails();
+		$emails->init();
+	}
+
+	/**
+	 * Test get and set items.
+	 */
+	public function test_style_inline() {
+		$email = new WC_Email();
+
+		// Test HTML email with inline styles.
+		$email->email_type = 'html';
+
+		// Set some content to get converted.
+		$result = $email->style_inline( '<p class="text">Hello World!</p>' );
+
+		ob_start();
+		include WC_Unit_Tests_Bootstrap::instance()->tests_dir . '/data/sample-email.html';
+		$expected = ob_get_clean();
+
+		$this->assertEquals( $expected, $result );
+
+		// Test plain text email.
+		$email->email_type = 'plain';
+
+		// Set some content to get converted.
+		$result   = $email->style_inline( '<p class="text">Hello World!</p>' );
+		$expected = '<p class="text">Hello World!</p>';
+
+		$this->assertEquals( $expected, $result );
+	}
+
+}
