diff --git a/README.md b/README.md
index 41a1f2c..9d64e17 100644
--- a/README.md
+++ b/README.md
@@ -13,12 +13,16 @@
 
 ## Development Notes
 
-## Create `ftest` Docker subnet before running tests or deploying
+### Create `ftest` Docker subnet before running tests or deploying
 
 ```bash
 docker network create --attachable -d bridge ftest
 ```
 
+### `cargo test` is breaking due to `Exception: Error while creating access token: 400...`
+
+Run `cargo test -j 1` to run tests serially.
+
 
 ### Test Runner