diff --git a/test/units/TEST-13-NSPAWN.machined.sh b/test/units/TEST-13-NSPAWN.machined.sh
index e48a2776ab..34307f3c8b 100755
--- a/test/units/TEST-13-NSPAWN.machined.sh
+++ b/test/units/TEST-13-NSPAWN.machined.sh
@@ -190,7 +190,7 @@ test ! -d /var/lib/machines/.hidden1
 
 # Prepare a simple raw container
 mkdir -p /tmp/mnt
-truncate -s 256M /var/tmp/container.raw
+truncate -s 384M /var/tmp/container.raw
 mkfs.ext4 /var/tmp/container.raw
 mount -o loop /var/tmp/container.raw /tmp/mnt
 cp -r /var/lib/machines/container1/* /tmp/mnt
diff --git a/test/units/TEST-13-NSPAWN.nspawn.sh b/test/units/TEST-13-NSPAWN.nspawn.sh
index d17c08c02a..c2fa9eaaf8 100755
--- a/test/units/TEST-13-NSPAWN.nspawn.sh
+++ b/test/units/TEST-13-NSPAWN.nspawn.sh
@@ -77,7 +77,7 @@ testcase_sanity() {
     create_dummy_container "$template"
     # Create a simple image from the just created container template
     image="$(mktemp /var/lib/machines/TEST-13-NSPAWN.image-XXX.img)"
-    truncate -s 256M "$image"
+    truncate -s 384M "$image"
     mkfs.ext4 "$image"
     mkdir -p /mnt
     mount -o loop "$image" /mnt