diff --git a/tools/ci/python_packages/tiny_test_fw/DUT.py b/tools/ci/python_packages/tiny_test_fw/DUT.py
index 71007d85b0..7c23711653 100644
--- a/tools/ci/python_packages/tiny_test_fw/DUT.py
+++ b/tools/ci/python_packages/tiny_test_fw/DUT.py
@@ -53,7 +53,7 @@ except ImportError:
 import serial
 from serial.tools import list_ports
 
-import Utility
+from . import Utility
 
 
 class ExpectTimeout(ValueError):
diff --git a/tools/ci/python_packages/tiny_test_fw/Env.py b/tools/ci/python_packages/tiny_test_fw/Env.py
index c6a9fb9ab3..c4769e6d93 100644
--- a/tools/ci/python_packages/tiny_test_fw/Env.py
+++ b/tools/ci/python_packages/tiny_test_fw/Env.py
@@ -19,7 +19,7 @@ import functools
 
 import netifaces
 
-import EnvConfig
+from . import EnvConfig
 
 
 def _synced(func):
diff --git a/tools/ci/python_packages/tiny_test_fw/TinyFW.py b/tools/ci/python_packages/tiny_test_fw/TinyFW.py
index f5ef7e1e69..6e2d03d38e 100644
--- a/tools/ci/python_packages/tiny_test_fw/TinyFW.py
+++ b/tools/ci/python_packages/tiny_test_fw/TinyFW.py
@@ -22,10 +22,10 @@ from datetime import datetime
 
 import junit_xml
 
-import Env
-import DUT
-import App
-import Utility
+from . import Env
+from . import DUT
+from . import App
+from . import Utility
 
 
 class DefaultEnvConfig(object):
diff --git a/tools/ci/python_packages/ttfw_idf/__init__.py b/tools/ci/python_packages/ttfw_idf/__init__.py
index 001da23095..a7c777194f 100644
--- a/tools/ci/python_packages/ttfw_idf/__init__.py
+++ b/tools/ci/python_packages/ttfw_idf/__init__.py
@@ -15,8 +15,8 @@ import os
 import re
 
 from tiny_test_fw import TinyFW, Utility
-from IDFApp import IDFApp, Example, UT
-from IDFDUT import IDFDUT
+from .IDFApp import IDFApp, Example, UT  # noqa: export all Apps for users
+from .IDFDUT import IDFDUT  # noqa: export DUTs for users
 
 
 def format_case_id(chip, case_name):