diff --git a/e2e/Kconfig b/e2e/Kconfig
index a404de67..68f77db6 100644
--- a/e2e/Kconfig
+++ b/e2e/Kconfig
@@ -18,7 +18,9 @@ menu "E2E test"
 config TLS_CERTIFICATE_PATH
 	string "Path of the tls certificate"
 	help
-	  Path to a certificate, the file byte's will be included in the binary and used for https and mqtts connection
+	  Path to a certificate in PEM format. it will be included in the binary and used for TLS
+	  authentication.
+	  This path should be relative to the end to end project folder.
 
 config DEVICE_ID
 	string "Astarte device ID"
diff --git a/e2e/certificate.cmake b/e2e/certificate.cmake
index c57a8b6c..1f638ac0 100644
--- a/e2e/certificate.cmake
+++ b/e2e/certificate.cmake
@@ -9,7 +9,7 @@ if(NOT DEFINED ${CERTIFICATE_PATH_VAR})
   return()
 endif()
 
-get_filename_component(certificate_file ${${CERTIFICATE_PATH_VAR}} ABSOLUTE)
+get_filename_component(certificate_file ${CMAKE_SOURCE_DIR}/${${CERTIFICATE_PATH_VAR}} ABSOLUTE)
 
 if(NOT EXISTS ${certificate_file})
   message(ERROR "The file path '${certificate_file}' specified in '${CERTIFICATE_PATH_VAR}' does not exist, provide a valid file or remove the option")
diff --git a/e2e/pytest/cfgvalues.py b/e2e/pytest/cfgvalues.py
index 8a5c0635..78bf072e 100644
--- a/e2e/pytest/cfgvalues.py
+++ b/e2e/pytest/cfgvalues.py
@@ -3,6 +3,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
 from typing import Optional
+import os
+from pathlib import Path
 
 from dotenv import dotenv_values
 
@@ -26,8 +28,8 @@ def __init__(self, config_file_path: str) -> None:
         self.device_id: str = self._get_config_value(prj_config, "CONFIG_DEVICE_ID")
         self.appengine_url: str = self._get_config_value(prj_config, "CONFIG_E2E_APPENGINE_URL")
         self.appengine_token: str = self._get_config_value(prj_config, "CONFIG_E2E_APPENGINE_TOKEN")
-        self.appengine_cert: bool | str = self._get_config_value(
-            prj_config, "CONFIG_TLS_CERTIFICATE_PATH"
+        self.appengine_cert: Path = Path(os.path.abspath(__file__)).parent.parent.joinpath(
+            self._get_config_value(prj_config, "CONFIG_TLS_CERTIFICATE_PATH")
         )
 
     @staticmethod
diff --git a/lib/astarte_device_sdk/Kconfig b/lib/astarte_device_sdk/Kconfig
index 82d31bb3..28ece23b 100644
--- a/lib/astarte_device_sdk/Kconfig
+++ b/lib/astarte_device_sdk/Kconfig
@@ -186,7 +186,7 @@ config ASTARTE_DEVICE_SDK_ADVANCED_CODE_GENERATION_INTERFACE_DIRECTORY
 	string "Path to the interface json directory"
 	depends on ASTARTE_DEVICE_SDK_ADVANCED_CODE_GENERATION
 	help
-		This must be set to the path of a directory containing valid interface jsons.
+		This must be set to the relative path of a directory containing valid interface jsons.
 		Generated interfaces may then be included by adding `#include "astarte_generated_interfaces.h"`.
 
 endmenu