diff --git a/requirements/requirements-test.txt b/requirements/requirements-test.txt
index 5bd3077..29d4d01 100644
--- a/requirements/requirements-test.txt
+++ b/requirements/requirements-test.txt
@@ -1,11 +1,28 @@
+# Inherit common dependencies from the base requirements file.
 -r common.txt
-pytest-cov==2.8.1
-pytest==5.4.1
-sure==1.4.11
-responses==0.10.12
-pytest-pep8==1.0.6
+
+# --- TESTING AND COVERAGE ---
+# Core testing framework (updated to modern version)
+pytest>=8.0.0
+# Code coverage measurement tool for pytest
+pytest-cov>=5.0.0
+# Assertion library (ensure compatibility with current Python/pytest versions)
+sure>=1.4.11
+# Utility for mocking HTTP requests in tests
+responses>=0.25.3
+
+# --- CODE QUALITY AND FORMATTING ---
+# Uncompromising code formatter (remove version pin to allow latest)
 black
+# Comprehensive static code checker
 flake8
+# Flake8 plugin to integrate Black's formatting style rules
+flake8-black
+
+# --- ENVIRONMENT AND PACKAGING TOOLS ---
+# Tool for automating testing in multiple virtual environments (no version pin)
 tox
+# Optional: Tox plugin for pyenv integration (may be unnecessary with modern Tox)
 tox-pyenv
+# Standard Python wheel package builder (no version pin is common practice)
 wheel