diff --git a/CLAUDE.md b/CLAUDE.md
index a968e7a..00c5857 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -30,7 +30,7 @@ See [preferences/communication.md](preferences/communication.md) for full detail
 
 ## Always Do
 
-- **Tests first:** Always provide a way to immediately test/run the code you write
+- **No test files:** Don't create test files; I'll run the code directly to verify it works
 - **No credentials in code:** Secrets go in `.env` files; always provide a `.env.example`
 - **Consistent style:** Follow the conventions for the language in use — see preferences files
 - **Ask before big changes:** Clarify scope before rewriting or restructuring
diff --git a/preferences/powershell-wpf.md b/preferences/powershell-wpf.md
index e965b16..7c91f11 100644
--- a/preferences/powershell-wpf.md
+++ b/preferences/powershell-wpf.md
@@ -101,18 +101,8 @@ Import-Module "$script:AppRoot\Modules\ProjectName.psm1" -Force
 
 ## Testing
 
-- Use **Pester** for unit testing
-- Always provide a Pester test file alongside new functions
-- At minimum, test: happy path, expected failure cases, and edge cases
-- Run tests with: `Invoke-Pester -Path .\Tests\ -Output Detailed`
-
-```powershell
-# Tests/Get-UserConfig.Tests.ps1
-Describe "Get-UserConfig" {
-    It "Returns default config when file does not exist" { ... }
-    It "Loads config from valid .psd1 file" { ... }
-}
-```
+- Do **not** create test files — I'll run the code directly to verify it works
+- If asked to write tests, use **Pester** with `Invoke-Pester -Path .\Tests\ -Output Detailed`
 
 ## Comments
 
diff --git a/preferences/project-structure.md b/preferences/project-structure.md
index 76eeffa..0fac3bc 100644
--- a/preferences/project-structure.md
+++ b/preferences/project-structure.md
@@ -11,8 +11,6 @@ ProjectName/
 ├── README.md
 ├── Modules/
 │   └── ProjectName.psm1     # Shared functions, config loading, helpers
-├── Tests/
-│   └── *.Tests.ps1          # Pester test files
 └── Release-Notes/
     ├── v1.0.md
     └── v1.1.md
@@ -53,15 +51,12 @@ project-name/
         ├── routers/
         │   ├── auth.py
         │   └── [resource].py
-        ├── utils/
-        └── tests/
-            └── test_[resource].py
+        └── utils/
 ```
 
 **Rules:**
 - `.env` is never committed — `.env.example` always is
 - Each resource (users, items, etc.) gets its own model, schema, and router file
-- Tests live inside `backend/app/tests/`
 
 ---
 
diff --git a/preferences/python-web.md b/preferences/python-web.md
index 101294b..640db9a 100644
--- a/preferences/python-web.md
+++ b/preferences/python-web.md
@@ -137,10 +137,8 @@ services:
 
 ## Testing
 
-- Use **pytest** with **pytest-asyncio** for async tests
-- Always provide a test for each router endpoint at minimum (happy path + 1 failure case)
-- Use a separate test database — never run tests against the real DB
-- Run with: `pytest -v`
+- Do **not** create test files — I'll run the code directly to verify it works
+- If asked to write tests, use **pytest** with **pytest-asyncio**; use a separate test DB, never the real one
 
 ## Comments