md
diff --git a/doc/connection-backoff-interop-test-description.md b/doc/connection-backoff-interop-test-description.md
index c7038da..8f099cc 100644
--- a/doc/connection-backoff-interop-test-description.md
+++ b/doc/connection-backoff-interop-test-description.md
@@ -7,6 +7,7 @@
The test server has a port (control_port) running a rpc service for controlling
the server and another port (retry_port) to close any incoming tcp connections.
The test has the following flow:
+
1. The server starts listening on control_port.
2. The client calls Start rpc on server control_port.
3. The server starts listening on retry_port.
@@ -35,6 +36,7 @@
backoffs on its own.
Procedure of client:
+
1. Calls Start on server control port and checks it succeeded.
2. Calls Start on server retry port with a deadline of 540s. Waits and checks it
got deadline exceeded status.