diff --git a/tests/qemu-iotests/150 b/tests/qemu-iotests/150
new file mode 100755
index 0000000000..97d2a35bfc
--- /dev/null
+++ b/tests/qemu-iotests/150
@@ -0,0 +1,105 @@
+#!/bin/bash
+#
+# Test that qemu-img convert -S 0 fully allocates the target image
+#
+# Copyright (C) 2016 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=mreitz@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+here="$PWD"
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+_cleanup()
+{
+    _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt generic
+_supported_proto file
+_supported_os Linux
+
+
+on_disk_size()
+{
+    du "$@" | sed -e 's/\t\+.*//'
+}
+
+
+img_size=1048576
+
+
+echo
+echo '=== Comparing empty image against sparse conversion ==='
+echo
+
+_make_test_img $img_size
+
+empty_size=$(on_disk_size "$TEST_IMG")
+
+
+$QEMU_IMG_PROG convert -O "$IMGFMT" -S 512 \
+    "json:{ 'driver': 'null-co', 'size': $img_size, 'read-zeroes': true }" \
+    "$TEST_IMG"
+
+sparse_convert_size=$(on_disk_size "$TEST_IMG")
+
+
+if [ "$empty_size" -eq "$sparse_convert_size" ]; then
+    echo 'Equal image size'
+else
+    echo 'Different image size'
+fi
+
+
+echo
+echo '=== Comparing full image against non-sparse conversion ==='
+echo
+
+_make_test_img $img_size
+$QEMU_IO -c "write 0 $img_size" "$TEST_IMG" | _filter_qemu_io
+
+full_size=$(on_disk_size "$TEST_IMG")
+
+
+$QEMU_IMG convert -O "$IMGFMT" -S 0 \
+    "json:{ 'driver': 'null-co', 'size': $img_size, 'read-zeroes': true }" \
+    "$TEST_IMG"
+
+non_sparse_convert_size=$(on_disk_size "$TEST_IMG")
+
+
+if [ "$full_size" -eq "$non_sparse_convert_size" ]; then
+    echo 'Equal image size'
+else
+    echo 'Different image size'
+fi
+
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/150.out b/tests/qemu-iotests/150.out
new file mode 100644
index 0000000000..2d29da13e7
--- /dev/null
+++ b/tests/qemu-iotests/150.out
@@ -0,0 +1,14 @@
+QA output created by 150
+
+=== Comparing empty image against sparse conversion ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
+Equal image size
+
+=== Comparing full image against non-sparse conversion ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Equal image size
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 92ae8ecaaf..2952b9d9cc 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -151,3 +151,4 @@
 146 auto quick
 148 rw auto quick
 149 rw auto sudo
+150 rw auto quick