diff --git a/nixos/doc/manual/development/running-nixos-tests-interactively.section.md b/nixos/doc/manual/development/running-nixos-tests-interactively.section.md
index 422dbf174ad5..b65cab992253 100644
--- a/nixos/doc/manual/development/running-nixos-tests-interactively.section.md
+++ b/nixos/doc/manual/development/running-nixos-tests-interactively.section.md
@@ -10,6 +10,12 @@ $ ./result/bin/nixos-test-driver
 >>>
 ```
 
+::: {.note}
+By executing the test driver in this way,
+the VMs executed may gain network & Internet access via their backdoor control interface,
+typically recognized as `eth0`.
+:::
+
 You can then take any Python statement, e.g.
 
 ```py