diff --git a/tests/auth_plugin_test.php b/tests/auth_plugin_test.php
index adf2f37..8e8f64f 100644
--- a/tests/auth_plugin_test.php
+++ b/tests/auth_plugin_test.php
@@ -26,7 +26,7 @@ use external_value;
 /**
  * Tests for auth_plugin_userkey class.
  *
- * @covers auth_plugin_userkey
+ * @covers \auth_plugin_userkey
  *
  * @package    auth_userkey
  * @copyright  2016 Dmitrii Metelkin (dmitriim@catalyst-au.net)
diff --git a/tests/core_userkey_manager_test.php b/tests/core_userkey_manager_test.php
index 96c135a..a5d1709 100644
--- a/tests/core_userkey_manager_test.php
+++ b/tests/core_userkey_manager_test.php
@@ -22,7 +22,7 @@ namespace auth_userkey;
  * Key validation is fully covered in auth_plugin_test.php file.
  * TODO: write tests for validate_key() function.
  *
- * @covers core_userkey_manager
+ * @covers \auth_userkey\core_userkey_manager
  *
  * @package    auth_userkey
  * @copyright  2016 Dmitrii Metelkin (dmitriim@catalyst-au.net)
diff --git a/tests/externallib_test.php b/tests/externallib_test.php
index 77081fb..ce42203 100644
--- a/tests/externallib_test.php
+++ b/tests/externallib_test.php
@@ -27,7 +27,7 @@ use context_system;
 /**
  * Tests for externallib.php.
  *
- * @covers auth_userkey_external
+ * @covers \auth_userkey_external
  *
  * @package    auth_userkey
  * @copyright  2016 Dmitrii Metelkin (dmitriim@catalyst-au.net)