diff --git a/nixos/tests/shadow.nix b/nixos/tests/shadow.nix
index e8624fde4cbd..0cc1d6811400 100644
--- a/nixos/tests/shadow.nix
+++ b/nixos/tests/shadow.nix
@@ -35,6 +35,7 @@ in import ./make-test-python.nix ({ pkgs, ... }: {
         shadow.send_chars("emma\n")
         shadow.wait_until_tty_matches(2, "login: emma")
         shadow.wait_until_succeeds("pgrep login")
+        shadow.sleep(2)
         shadow.send_chars("${password1}\n")
         shadow.send_chars("whoami > /tmp/1\n")
         shadow.wait_for_file("/tmp/1")
@@ -49,6 +50,7 @@ in import ./make-test-python.nix ({ pkgs, ... }: {
         shadow.send_chars("emma\n")
         shadow.wait_until_tty_matches(3, "login: emma")
         shadow.wait_until_succeeds("pgrep login")
+        shadow.sleep(2)
         shadow.send_chars("${password1}\n")
         shadow.send_chars("passwd\n")
         shadow.sleep(2)
@@ -66,12 +68,14 @@ in import ./make-test-python.nix ({ pkgs, ... }: {
         shadow.send_chars("emma\n")
         shadow.wait_until_tty_matches(4, "login: emma")
         shadow.wait_until_succeeds("pgrep login")
+        shadow.sleep(2)
         shadow.send_chars("${password1}\n")
         shadow.wait_until_tty_matches(4, "Login incorrect")
         shadow.wait_until_tty_matches(4, "login:")
         shadow.send_chars("emma\n")
         shadow.wait_until_tty_matches(4, "login: emma")
         shadow.wait_until_succeeds("pgrep login")
+        shadow.sleep(2)
         shadow.send_chars("${password3}\n")
         shadow.send_chars("whoami > /tmp/2\n")
         shadow.wait_for_file("/tmp/2")