autopkgtest-sid-update.exp: Fix debconf questions

diff --git a/autopkgtest-sid-update.exp b/autopkgtest-sid-update.exp
index 04788805b7cb8c2d20580f848a0d5e9432b648f6..0d1cf946b26dd554daac06f877edc0c2d427a94f 100755 (executable)
--- a/autopkgtest-sid-update.exp
+++ b/autopkgtest-sid-update.exp
@@ -9,7 +9,7 @@ expect "login: "
 send "root\r"
 
 expect "# "
-send "apt update && apt-get -y -o Dpkg::Options::=--force-confnew dist-upgrade\r"
+send "apt update && DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::=--force-confnew dist-upgrade\r"
 
 expect "# "
 send "apt-get --purge -y autoremove && apt-get clean\r"