diff --git a/README.md b/README.md
index 66ba448..592262b 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,7 @@ viron/
  │    └── services/          # Business logic  
  ├── src/main/python/        # Python client SDK  
  ├── src/test/java/...       # Unit and integration tests  
+ ├── src/test/python/...     # Python client SDK tests (pytest)  
  ├── db-scripts/             # SQL schema setup scripts, and migrations for existing databases  
  ├── docs/  
  │    ├── MVP.md             # Implementation checklist for MVP  
@@ -152,9 +153,21 @@ or refer to the `docs/openapi/viron-api.json` file.
 
 ## 🧪 Testing
 
-Run all unit and integration tests:  
+Run all Java unit and integration tests:  
 mvn test
 
+Run the Python client tests (requires Python 3.8+, `requests`, and pytest 7 or newer):  
+pytest
+
+`pytest.ini` puts the repository root on the path, so the client is imported the same way
+from tests as it is from application code (`src.main.python.preponderous.viron...`). The
+`pythonpath` setting it uses arrived in pytest 7.0, so the pytest 6.2.4 pinned by
+`requirements.txt` ignores it and collection fails; install a newer pytest until that pin is
+raised.
+
+Note that CI runs the Java build and tests only — Python client changes are not covered there
+and must be checked locally.
+
 ---
 
 ## 📄 License
diff --git a/pytest.ini b/pytest.ini
index a08953c..0aea8cc 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,3 +1,5 @@
 [pytest]
-pythonpath = ./src/main/python
-             ./src/test/python
\ No newline at end of file
+# The client and its tests import through the full path from the repository
+# root (src.main.python.preponderous.viron...), so the root is what belongs on
+# the path.
+pythonpath = .
diff --git a/src/main/python/preponderous/viron/services/environmentService.py b/src/main/python/preponderous/viron/services/environmentService.py
index 35bee0b..29cb96a 100644
--- a/src/main/python/preponderous/viron/services/environmentService.py
+++ b/src/main/python/preponderous/viron/services/environmentService.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2024 Preponderous Software
 # MIT License
 
-from typing import Optional
+from typing import List, Optional
 import requests
 from src.main.python.preponderous.viron.models.environment import Environment
 
@@ -18,7 +18,7 @@ def get_base_url(self) -> str:
     def get_auth_headers(self) -> dict:
         return {"Authorization": f"Bearer {self.auth_token}"} if self.auth_token else {}
 
-    def get_all_environments(self) -> list[Environment]:
+    def get_all_environments(self) -> List[Environment]:
         response = requests.get(f"{self.get_base_url()}", headers=self.get_auth_headers())
         response.raise_for_status()
         return [Environment(**env) for env in response.json()]