diff --git a/pyproject.toml b/pyproject.toml
index a4d2f856..0e1f0982 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,6 +75,9 @@ select = [
 ]
 ignore = ["E501"] # Line too long
 
+[tool.ruff.lint.per-file-ignores]
+"tests/**" = ["S101"]  # Allow assert in tests
+
 [tool.ruff.lint.pydocstyle]
 convention = "google"  # Accepts: "google", "numpy", or "pep257".
 
diff --git a/tests/test_auth.py b/tests/test_auth.py
index 8106d29d..f7b274bb 100644
--- a/tests/test_auth.py
+++ b/tests/test_auth.py
@@ -1,5 +1,8 @@
 """Tests for authentication module."""
 
+# ruff: noqa: S105, S106
+# S105/S106: Test credentials use dummy values.
+
 from __future__ import annotations
 
 import base64
diff --git a/tests/test_client.py b/tests/test_client.py
index 45ef7508..ad25cd48 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -1,7 +1,7 @@
 """Unit tests for the high-level OverkizClient behaviour and responses."""
 
-# ruff: noqa: S101, ASYNC230
-# S101: Tests use assert statements
+# ruff: noqa: ASYNC230, S106
+# S106: Test credentials use dummy values.
 # ASYNC230: Blocking open() is acceptable for reading test fixtures
 
 from __future__ import annotations
diff --git a/tests/test_enums.py b/tests/test_enums.py
index b693231a..79abfd8b 100644
--- a/tests/test_enums.py
+++ b/tests/test_enums.py
@@ -1,8 +1,5 @@
 """Tests for enum helper behaviour and expected values."""
 
-# ruff: noqa: S101
-# Tests use assert statements
-
 from pyoverkiz.enums import (
     EventName,
     ExecutionSubType,
diff --git a/tests/test_models.py b/tests/test_models.py
index 73568796..5f76c32f 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -1,8 +1,5 @@
 """Unit tests for models (Device, State and States helpers)."""
 
-# ruff: noqa: S101
-# Tests use assert statements
-
 from __future__ import annotations
 
 import humps
diff --git a/tests/test_obfuscate.py b/tests/test_obfuscate.py
index 41063946..ec129460 100644
--- a/tests/test_obfuscate.py
+++ b/tests/test_obfuscate.py
@@ -1,8 +1,5 @@
 """Tests for the obfuscation utilities used in fixtures and logging."""
 
-# ruff: noqa: S101
-# Tests use assert statements
-
 import pytest
 
 from pyoverkiz.obfuscate import obfuscate_email, obfuscate_sensitive_data
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 4e739625..8b33b8f7 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,8 +1,5 @@
 """Tests for utility helper functions like server generation and gateway checks."""
 
-# ruff: noqa: S101
-# Tests use assert statements
-
 import pytest
 
 from pyoverkiz.utils import create_local_server_config, is_overkiz_gateway