diff --git a/test.sh b/test.sh
index 70cfae9..1eb6280 100644
--- a/test.sh
+++ b/test.sh
@@ -4,13 +4,17 @@ set -e
 # set -x # For debugging
 
 # If you ever mess this up:
-#  $ sudo mknod /dev/loop-control c 10 237
-#  $ sudo chmod 600 /dev/loop-control
-#  $ sudo chown root:root /dev/loop-control
+#  $ mknod /dev/loop-control c 10 237
+#  $ chmod 600 /dev/loop-control
+#  $ chown root:root /dev/loop-control
 #
 # For cleanup:
-#  $ sudo find /dev -maxdepth 1 -type b -name 'loop[0-9]*' -exec rm -f {} \;
+#  $ find /dev -maxdepth 1 -type b -name 'loop[0-9]*' -exec rm -f {} \;
 
+if [ "$(id -u)" -ne 0 ]; then
+    echo "Run as root. We need permissions to write and setup a loop device."
+    exit 1
+fi
 
 DISKFILE="/tmp/disk.img"
 BINFILE="/tmp/file.bin"
@@ -22,9 +26,9 @@ echo "Using device: ${LOOPDEV}"
 cleanup() {
     echo "Cleaning up..."
     set +e -x
-    sudo losetup -d ${LOOPDEV}
-    sudo rm ${LOOPDEV}
-    sudo rm ${BINFILE} ${DISKFILE}
+    losetup -d ${LOOPDEV}
+    rm ${LOOPDEV}
+    rm ${BINFILE} ${DISKFILE}
 }
 
 trap cleanup EXIT INT TERM
@@ -36,28 +40,31 @@ if losetup ${LOOPDEV} >/dev/null 2>&1; then
 fi
 
 if [ ! -f ${DISKFILE} ]; then
+    echo "Creating ${DISKFILE}"
     dd if=/dev/zero of=${DISKFILE} bs=1M count=256
 fi
 
 if [ ! -f ${BINFILE} ]; then
+    echo "Creating ${BINFILE}"
     dd if=/dev/urandom of=${BINFILE} bs=1M count=64
 fi
 
 if [ ! -e ${LOOPDEV} ]; then
-    sudo losetup ${LOOPDEV} ${DISKFILE}
+    mknod ${LOOPDEV} b 7 ${LOOPNUM} # busybox needs this
+    losetup ${LOOPDEV} ${DISKFILE}
 fi
 
-sudo ./writeimg -nd ${LOOPDEV} ${BINFILE}
-sudo ./writeimg -vnd ${LOOPDEV} ${BINFILE}
+./writeimg -nd ${LOOPDEV} ${BINFILE}
+./writeimg -vnd ${LOOPDEV} ${BINFILE}
 
-sudo ./writeimg -nd ${LOOPDEV} ./writeimg
-sudo ./writeimg -vnd ${LOOPDEV} ./writeimg
+./writeimg -nd ${LOOPDEV} ./writeimg
+./writeimg -vnd ${LOOPDEV} ./writeimg
 
-sudo ./writeimg -nd ${LOOPDEV} ./LICENSE
-sudo ./writeimg -vnd ${LOOPDEV} ./LICENSE
+./writeimg -nd ${LOOPDEV} ./LICENSE
+./writeimg -vnd ${LOOPDEV} ./LICENSE
 
 # Redirect this to avoid confusion
-! sudo ./writeimg -vnd ${LOOPDEV} ./crc32.h 2>/dev/null
+! ./writeimg -vnd ${LOOPDEV} ./crc32.h 2>/dev/null
 
 GREEN="\e[32m"
 RESET="\e[0m"