diff --git a/nixos/doc/manual/development/writing-nixos-tests.xml b/nixos/doc/manual/development/writing-nixos-tests.xml
index b9da712b86f..7b25a39e83b 100644
--- a/nixos/doc/manual/development/writing-nixos-tests.xml
+++ b/nixos/doc/manual/development/writing-nixos-tests.xml
@@ -262,8 +262,18 @@ startAll;
waitForWindow(qr/Terminal/).
+
+ copyFileFromHost
+ Copies a file from host to machine, e.g.,
+ copyFileFromHost("myfile", "/etc/my/important/file").
+ The first argument is the file on the host. The file needs to be
+ accessible while building the nix derivation. The second argument is
+ the location of the file on the machine.
+
+
+
-
\ No newline at end of file
+