diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 9e1dfef42..dfa39b6d1 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -307,7 +307,12 @@ BootstrapRpmCommon() {
 BootstrapSuseCommon() {
   # SLE12 don't have python-virtualenv
 
-  $SUDO zypper -nq in -l \
+  if [ "$ASSUME_YES" = 1 ]; then
+    zypper_flags="-nq"
+    install_flags="-l"
+  fi
+
+  $SUDO zypper $zypper_flags in $install_flags \
     python \
     python-devel \
     python-virtualenv \
diff --git a/letsencrypt-auto-source/pieces/bootstrappers/suse_common.sh b/letsencrypt-auto-source/pieces/bootstrappers/suse_common.sh
index 46c60f992..9ac295922 100755
--- a/letsencrypt-auto-source/pieces/bootstrappers/suse_common.sh
+++ b/letsencrypt-auto-source/pieces/bootstrappers/suse_common.sh
@@ -1,7 +1,12 @@
 BootstrapSuseCommon() {
   # SLE12 don't have python-virtualenv
 
-  $SUDO zypper -nq in -l \
+  if [ "$ASSUME_YES" = 1 ]; then
+    zypper_flags="-nq"
+    install_flags="-l"
+  fi
+
+  $SUDO zypper $zypper_flags in $install_flags \
     python \
     python-devel \
     python-virtualenv \