diff --git a/tests/README.txt b/tests/README.txt
index 7ad3bd5..5abb04c 100644
--- a/tests/README.txt
+++ b/tests/README.txt
@@ -1,2 +1,4 @@
 alice.gpg contains the private key which has been used to encrypt the
 passwords in password-store/
+
+The passphrase for the key is `foobar`.