diff --git a/includes/classes/HealthCheck/HealthCheckElasticsearch.php b/includes/classes/HealthCheck/HealthCheckElasticsearch.php
index 7f2328711d..74aab0f6b5 100644
--- a/includes/classes/HealthCheck/HealthCheckElasticsearch.php
+++ b/includes/classes/HealthCheck/HealthCheckElasticsearch.php
@@ -13,7 +13,9 @@
 use ElasticPress\Elasticsearch as Elasticsearch;
 
 if ( ! defined( 'ABSPATH' ) ) {
+	// @codeCoverageIgnoreStart
 	exit; // Exit if accessed directly.
+	// @codeCoverageIgnoreEnd
 }
 
 /**
diff --git a/tests/php/TestHealthCheckElasticsearch.php b/tests/php/TestHealthCheckElasticsearch.php
new file mode 100644
index 0000000000..9750ba9b9c
--- /dev/null
+++ b/tests/php/TestHealthCheckElasticsearch.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * Test health check elasticsearch functionality.
+ *
+ * @since 4.4.1
+ * @package elasticpress
+ */
+
+namespace ElasticPressTest;
+
+use ElasticPress\Elasticsearch;
+use WP_Site_Health;
+use WP_Ajax_UnitTestCase;
+use WPAjaxDieContinueException;
+
+/**
+ *  Health check elasticsearch test class
+ */
+class TestHealthCheckElasticsearch extends WP_Ajax_UnitTestCase {
+
+	/**
+	 * Test if the test is registered
+	 */
+	public function testIsRegistered() {
+		$tests = WP_Site_Health::get_tests();
+
+		$this->assertArrayHasKey( 'elasticpress-health-check-elasticsearch', $tests['async'] );
+	}
+
+	/**
+	 * Test ajax output.
+	 */
+	public function testAjaxOutput() {
+		$admin_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $admin_id );
+
+		// Make the request.
+		try {
+			$this->_handleAjax( 'health-check-elasticpress-health-check-elasticsearch' );
+		} catch ( WPAjaxDieContinueException $e ) {
+			unset( $e );
+		}
+
+		$response = json_decode( $this->_last_response, true );
+
+		$this->assertTrue( $response['success'] );
+		$this->assertEquals( 'Your site can connect to Elasticsearch.', $response['data']['label'] );
+		$this->assertEquals( 'good', $response['data']['status'] );
+		$this->assertEquals( 'ElasticPress', $response['data']['badge']['label'] );
+		$this->assertEquals( 'green', $response['data']['badge']['color'] );
+	}
+
+	/**
+	 * Test ajax output when host is not set.
+	 */
+	public function testAjaxOutPutWhenHostIsNotSet() {
+		$admin_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $admin_id );
+
+		add_filter( 'ep_host', '__return_empty_string' );
+
+		// Make the request.
+		try {
+			$this->_handleAjax( 'health-check-elasticpress-health-check-elasticsearch' );
+		} catch ( WPAjaxDieContinueException $e ) {
+			unset( $e );
+		}
+
+		$response = json_decode( $this->_last_response, true );
+
+		$this->assertTrue( $response['success'] );
+		$this->assertEquals( 'Your site could not connect to Elasticsearch', $response['data']['label'] );
+		$this->assertEquals( 'critical', $response['data']['status'] );
+		$this->assertEquals( 'ElasticPress', $response['data']['badge']['label'] );
+		$this->assertEquals( 'red', $response['data']['badge']['color'] );
+		$this->assertEquals( 'The Elasticsearch host is not set.', $response['data']['description'] );
+	}
+
+	/**
+	 * Test ajax output when host is not valid.
+	 */
+	public function testAjaxOutPutWhenHostIsNotValid() {
+		$admin_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $admin_id );
+
+		add_filter( 'ep_elasticsearch_version', '__return_false' );
+
+		// Make the request.
+		try {
+			$this->_handleAjax( 'health-check-elasticpress-health-check-elasticsearch' );
+		} catch ( WPAjaxDieContinueException $e ) {
+			unset( $e );
+		}
+
+		$response = json_decode( $this->_last_response, true );
+
+		$this->assertTrue( $response['success'] );
+		$this->assertEquals( 'Your site could not connect to Elasticsearch', $response['data']['label'] );
+		$this->assertEquals( 'critical', $response['data']['status'] );
+		$this->assertEquals( 'ElasticPress', $response['data']['badge']['label'] );
+		$this->assertEquals( 'red', $response['data']['badge']['color'] );
+		$this->assertEquals( 'Check if your Elasticsearch host URL is correct and you have the right access to the host.', $response['data']['description'] );
+	}
+
+	/**
+	 * Test ajax output when elasticpress.io host is not valid.
+	 */
+	public function testAjaxOutPutWhenEpioHostIsNotValid() {
+		$admin_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $admin_id );
+
+		$ep_host = function () {
+			return 'elasticpress.io/random-string';
+		};
+		add_filter( 'ep_host', $ep_host );
+		add_filter( 'ep_elasticsearch_version', '__return_false' );
+
+		// Make the request.
+		try {
+			$this->_handleAjax( 'health-check-elasticpress-health-check-elasticsearch' );
+		} catch ( WPAjaxDieContinueException $e ) {
+			unset( $e );
+		}
+
+		$response = json_decode( $this->_last_response, true );
+
+		$this->assertTrue( $response['success'] );
+		$this->assertEquals( 'Your site could not connect to Elasticsearch', $response['data']['label'] );
+		$this->assertEquals( 'critical', $response['data']['status'] );
+		$this->assertEquals( 'ElasticPress', $response['data']['badge']['label'] );
+		$this->assertEquals( 'red', $response['data']['badge']['color'] );
+		$this->assertEquals( 'Check if your credentials to ElasticPress.io host are correct.', $response['data']['description'] );
+
+		remove_filter( 'ep_host', $ep_host );
+		remove_filter( 'ep_elasticsearch_version', '__return_false' );
+
+		// refetch the elasticsearch version. This is needed because this test has changed the value.
+		Elasticsearch::factory()->get_elasticsearch_version( true );
+	}
+
+}