diff --git a/.woodpecker.yml b/.woodpecker.yml
index f4a4275..396c84c 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -28,8 +28,8 @@ steps:
     image: python:3.11-bookworm
     group: test
     commands:
-      - debconf-set-selections <<<"postfix postfix/mailname string example.org"
-      - debconf-set-selections <<<"postfix postfix/main_mailer_type string 'Local only'"
+      - echo "postfix postfix/mailname string example.org" | debconf-set-selections
+      - echo "postfix postfix/main_mailer_type string 'Local only'" | debconf-set-selections
       - apt update; apt install --yes schleuder schleuder-cli postfix patch
       - patch -d/ -p1 < test/01-ruby3cgi.patch  # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1040257
       - /usr/lib/postfix/configure-instance.sh -
diff --git a/setup.py b/setup.py
index 95f9f14..27f8c10 100755
--- a/setup.py
+++ b/setup.py
@@ -20,6 +20,7 @@ setup(
     ],
     extras_require={
         'test': [
+            'aiosmtpd',
             'coverage',
             'pycodestyle',
             'mypy',