diff --git a/test/bare.test b/test/bare.test
index 038db4a..fd1d1e0 100755
--- a/test/bare.test
+++ b/test/bare.test
@@ -88,6 +88,7 @@ qemu-nbd -d "$nbd"
 (cd .. && ./tinyramfs -lk "$kernel" -c "$config" "$initrd")
 
 set -- \
+    -m 1G \
     -no-reboot \
     -initrd "$initrd" \
     -kernel "$vmlinuz" \
diff --git a/test/luks.test b/test/luks.test
index a5dd2ba..6bc02be 100755
--- a/test/luks.test
+++ b/test/luks.test
@@ -98,6 +98,7 @@ qemu-nbd -d "$nbd"
 (cd .. && ./tinyramfs -lk "$kernel" -c "$config" "$initrd")
 
 set -- \
+    -m 1G \
     -no-reboot \
     -initrd "$initrd" \
     -kernel "$vmlinuz" \
diff --git a/test/lvm.test b/test/lvm.test
index 58aecd7..10dc5c9 100755
--- a/test/lvm.test
+++ b/test/lvm.test
@@ -98,6 +98,7 @@ qemu-nbd -d "$nbd"
 (cd .. && ./tinyramfs -lk "$kernel" -c "$config" "$initrd")
 
 set -- \
+    -m 1G \
     -no-reboot \
     -initrd "$initrd" \
     -kernel "$vmlinuz" \
diff --git a/test/zfs.test b/test/zfs.test
index 261e95b..8b6c80a 100755
--- a/test/zfs.test
+++ b/test/zfs.test
@@ -104,6 +104,7 @@ qemu-nbd -d "$nbd"
 (cd .. && ./tinyramfs -lk "$kernel" -c "$config" "$initrd")
 
 set -- \
+    -m 1G \
     -no-reboot \
     -initrd "$initrd" \
     -kernel "$vmlinuz" \