diff --git a/nixos/tests/opensmtpd.nix b/nixos/tests/opensmtpd.nix
index e1c26a7c6775..f613c7241134 100644
--- a/nixos/tests/opensmtpd.nix
+++ b/nixos/tests/opensmtpd.nix
@@ -149,7 +149,7 @@ import ./make-test-python.nix {
     client.wait_for_unit("network-online.target")
     smtp1.wait_for_unit("opensmtpd")
     smtp2.wait_for_unit("opensmtpd")
-    smtp2.wait_for_unit("dovecot2")
+    smtp2.wait_for_unit("dovecot")
 
     # To prevent sporadic failures during daemon startup, make sure
     # services are listening on their ports before sending requests