diff --git a/requirements-testing.txt b/requirements-testing.txt
index 7d0f6623..9821a776 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -1,6 +1,6 @@
 coverage[toml] == 7.*
 coverage-conditional-plugin == 0.9.0
-pytest == 7.4.*
+pytest == 8.3.*
 pytest-cov == 6.1.*
 pytest-timeout == 2.4.*
 pytest-xdist == 3.6.*
diff --git a/test/openjd/adaptor_runtime/integ/background/test_background_mode.py b/test/openjd/adaptor_runtime/integ/background/test_background_mode.py
index 5357f482..1fdc16ca 100644
--- a/test/openjd/adaptor_runtime/integ/background/test_background_mode.py
+++ b/test/openjd/adaptor_runtime/integ/background/test_background_mode.py
@@ -29,10 +29,15 @@
 
 mod_path = (Path(__file__).parent.parent).resolve()
 sys.path.append(str(mod_path))
+
 if (_pypath := os.environ.get("PYTHONPATH")) is not None:
     os.environ["PYTHONPATH"] = os.pathsep.join((_pypath, str(mod_path)))
 else:
     os.environ["PYTHONPATH"] = str(mod_path)
+
+# Add the module path to PYTHONPATH for subprocesses
+os.environ["PYTEST_XDIST_WORKER_PYTHONPATH"] = str(mod_path)
+
 from AdaptorExample import AdaptorExample  # noqa: E402
 
 
diff --git a/test/openjd/adaptor_runtime/integ/test_integration_entrypoint.py b/test/openjd/adaptor_runtime/integ/test_integration_entrypoint.py
index 0218c7e4..22b0d5e3 100644
--- a/test/openjd/adaptor_runtime/integ/test_integration_entrypoint.py
+++ b/test/openjd/adaptor_runtime/integ/test_integration_entrypoint.py
@@ -20,10 +20,15 @@
 
 mod_path = Path(__file__).parent.resolve()
 sys.path.append(str(mod_path))
+
 if (_pypath := os.environ.get("PYTHONPATH")) is not None:
-    os.environ["PYTHONPATH"] = ":".join((_pypath, str(mod_path)))
+    os.environ["PYTHONPATH"] = os.pathsep.join([_pypath, str(mod_path)])
 else:
     os.environ["PYTHONPATH"] = str(mod_path)
+
+# Add the module path to PYTHONPATH for subprocesses
+os.environ["PYTEST_XDIST_WORKER_PYTHONPATH"] = str(mod_path)
+
 from CommandAdaptorExample import CommandAdaptorExample  # noqa: E402