diff --git a/Makefile.am b/Makefile.am
index 1e8cb02..9ed0ff1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -112,7 +112,8 @@ dist_check_SCRIPTS = \
 	test/functional/update.bats \
 	test/functional/fullfiles.bats \
 	test/functional/pack.bats \
-	test/functional/full-run.bats
+	test/functional/full-run.bats \
+	test/functional/full-run-delta.bats
 endif
 
 if COVERAGE
diff --git a/test/functional/full-run-delta.bats b/test/functional/full-run-delta.bats
new file mode 100755
index 0000000..2e30838
--- /dev/null
+++ b/test/functional/full-run-delta.bats
@@ -0,0 +1,46 @@
+#!/usr/bin/env bats
+
+# common functions
+load swupdlib
+
+setup() {
+  DIR=$(init_web_dir "$srcdir/web-dir")
+  export DIR
+
+  init_server_ini
+  init_latest_ver 0
+  init_groups_ini os-core test-bundle
+
+  set_os_release 10 os-core
+  track_bundle 10 os-core
+  track_bundle 10 test-bundle
+  set_os_release 20 os-core
+  track_bundle 20 os-core
+  track_bundle 20 test-bundle
+
+  gen_file_to_delta 10 4096 20 4 test-bundle
+}
+
+@test "full run update creation with delta packs" {
+  # build the first version
+  sudo $srcdir/swupd_create_update --osversion 10 --statedir $DIR
+  sudo $srcdir/swupd_make_fullfiles --statedir $DIR 10
+  sudo $srcdir/swupd_make_pack --statedir $DIR 0 10 os-core
+  sudo $srcdir/swupd_make_pack --statedir $DIR 0 10 test-bundle
+
+  # then the second version...
+  sudo $srcdir/swupd_create_update --osversion 20 --statedir $DIR
+  sudo $srcdir/swupd_make_fullfiles --statedir $DIR 20
+  sudo $srcdir/swupd_make_pack --statedir $DIR 0 20 os-core
+  sudo $srcdir/swupd_make_pack --statedir $DIR 0 20 test-bundle
+
+  # and with delta packs this time
+  sudo $srcdir/swupd_make_pack --statedir $DIR 10 20 os-core
+  sudo $srcdir/swupd_make_pack --statedir $DIR 10 20 test-bundle
+}
+
+teardown() {
+  sudo rm -rf $DIR
+}
+
+# vi: ft=sh ts=8 sw=2 sts=2 et tw=80
diff --git a/test/functional/swupdlib.bash b/test/functional/swupdlib.bash
index e424308..b01ba01 100644
--- a/test/functional/swupdlib.bash
+++ b/test/functional/swupdlib.bash
@@ -39,4 +39,23 @@ track_bundle() {
   touch $DIR/image/$ver/$bundle/usr/share/clear/bundles/$bundle
 }
 
+gen_file_to_delta() {
+  local origver=$1
+  local origsize=$2
+  local newver=$3
+  local newbytes=$4
+  local bundle=$5
+
+  # create some random data for the original version
+  mkdir -p $DIR/image/$origver/$bundle
+  dd if=/dev/urandom of=$DIR/image/$origver/$bundle/randomfile bs=1 count=$origsize
+
+  # append more random data to the end of the file in the new version
+  TMP=$(mktemp foo.XXXXXX)
+  mkdir -p $DIR/image/$newver/$bundle
+  dd if=/dev/urandom of=$TMP bs=1 count=$newbytes
+  cat $DIR/image/$origver/$bundle/randomfile $TMP > $DIR/image/$newver/$bundle/randomfile
+  rm $TMP
+}
+
 # vi: ft=sh ts=8 sw=2 sts=2 et tw=80