diff --git a/docs/playwright.md b/docs/playwright.md
index 315033955b..a4c7d1b188 100644
--- a/docs/playwright.md
+++ b/docs/playwright.md
@@ -77,6 +77,9 @@ test.use({
 ```
 
 The appropriate homeserver will be launched by the Playwright worker and reused for all tests which match the worker configuration.
+Due to homeservers being reused between tests, please use unique names for any rooms put into the room directory as
+they may be visible from other tests, the suggested approach is to use `testInfo.testId` within the name or lodash's uniqueId.
+We remove public rooms from the directory between tests but deleting users doesn't have a homeserver agnostic solution.
 The logs from testcontainers will be attached to any reports output from Playwright.
 
 ## Writing Tests