diff -Nru php-sabre-dav-2.1-2.1.10/debian/changelog php-sabre-dav-2.1-2.1.10/debian/changelog
--- php-sabre-dav-2.1-2.1.10/debian/changelog	2016-03-11 09:47:28.000000000 -0800
+++ php-sabre-dav-2.1-2.1.10/debian/changelog	2016-03-15 11:08:38.000000000 -0700
@@ -1,3 +1,14 @@
+php-sabre-dav-2.1 (2.1.10-1ubuntu1) xenial; urgency=medium
+
+  * Merge with Debian unstable (LP: #1557599). Remaining changes:
+    - Add php-mbstring as a test dependency.
+  * Drop:
+    - Add php-mbstring as a build dependency.
+    - Update to PHP7.0 build and test dependencies.
+      [ Present in Debian ]
+
+ -- Nishanth Aravamudan <nish.aravamudan@canonical.com>  Tue, 15 Mar 2016 11:07:05 -0700
+
 php-sabre-dav-2.1 (2.1.10-1) unstable; urgency=medium
 
   [ Evert Pot ]
@@ -23,6 +34,13 @@
 
  -- David Prévot <taffit@debian.org>  Wed, 02 Mar 2016 10:07:28 -0400
 
+php-sabre-dav-2.1 (2.1.9-1ubuntu1) xenial; urgency=medium
+
+  * Update to PHP7.0 build and test dependencies.
+  * Add php-mbstring as a build & test dependency.
+
+ -- Nishanth Aravamudan <nish.aravamudan@canonical.com>  Tue, 15 Mar 2016 08:36:27 -0700
+
 php-sabre-dav-2.1 (2.1.9-1) unstable; urgency=medium
 
   [ Thomas Müller ]
diff -Nru php-sabre-dav-2.1-2.1.10/debian/control php-sabre-dav-2.1-2.1.10/debian/control
--- php-sabre-dav-2.1-2.1.10/debian/control	2016-03-11 09:43:42.000000000 -0800
+++ php-sabre-dav-2.1-2.1.10/debian/control	2016-03-15 11:10:39.000000000 -0700
@@ -1,7 +1,8 @@
 Source: php-sabre-dav-2.1
 Section: php
 Priority: optional
-Maintainer: Debian PHP PEAR Maintainers <pkg-php-pear@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian PHP PEAR Maintainers <pkg-php-pear@lists.alioth.debian.org>
 Uploaders: David Prévot <taffit@debian.org>
 Build-Depends: debhelper (>= 8.0.0),
                help2man,
diff -Nru php-sabre-dav-2.1-2.1.10/debian/tests/control php-sabre-dav-2.1-2.1.10/debian/tests/control
--- php-sabre-dav-2.1-2.1.10/debian/tests/control	2016-03-11 09:43:42.000000000 -0800
+++ php-sabre-dav-2.1-2.1.10/debian/tests/control	2016-03-15 11:05:09.000000000 -0700
@@ -3,4 +3,4 @@
 
 Test-Command: mkdir --parents vendor && phpab --output vendor/autoload.php --basedir vendor --template debian/autoload.tests.php.tpl tests/Sabre && phpunit --configuration tests/phpunit.xml
 Restrictions: rw-build-tree
-Depends: @, php-curl, php-sqlite3, phpab, phpunit
+Depends: @, php-curl, php-mbstring, php-sqlite3, phpab, phpunit