diff --git a/tests/README.md b/tests/README.md
index eb2f24b..266bcf9 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -90,6 +90,8 @@ from codeception site.
 
 3. include `c3.php` file in your `index-test.php` file before application run, so it can catch needed requests.
 
+4. edit `c3.php` to update config file path (~ line 55) with `$config_file = realpath(__DIR__ . '../tests/codeception.yml');`
+
 Configuration options that are used by remote code coverage:
 
 - c3_url: url pointing to entry script that includes `c3.php` file, so `Codeception` will be able to produce code coverage;