Document mocking compatibility (#537)

diff --git a/docs/compatibility.md b/docs/compatibility.md
index 250a02cdc315a3259340bfaa3cc2283dd2f7c71b..7b2b3911922a1db366ff69338dd8f58961e30175 100644 (file)
--- a/docs/compatibility.md
+++ b/docs/compatibility.md
@@ -32,3 +32,7 @@ with httpx.Client(**kwargs) as client:
 ```
 
 More detailed documentation and usage of `Client` can be found in [Advanced Usage](advanced.md).
+
+## Mocking
+
+If you need to mock HTTPX the same way that test utilities like `responses` and `requests-mock` does for `requests`, see [RESPX](https://github.com/lundberg/respx).