diff --git a/tests/setup_guest.sh b/tests/setup_guest.sh
index 36cafc8..21cff7d 100755
--- a/tests/setup_guest.sh
+++ b/tests/setup_guest.sh
@@ -2,7 +2,7 @@
 
 # this script is supposed to be executed under root
 
-apt install -y python3 python3-pip
+DEBIAN_FRONTEND=noninteractive apt install -y python3 python3-pip
 
 cd lib/tdx-tools/
 python3 -m pip install --break-system-packages ./