diff --git a/.papr.yml b/.papr.yml
index d33046ec..6e67d232 100644
--- a/.papr.yml
+++ b/.papr.yml
@@ -165,19 +165,19 @@ branches:
     - auto
     - try
 
-context: f26-flatpak
+context: f27-flatpak
 required: false
 
 # This test case wants an "unprivileged container with bubblewrap",
 # which we don't have right now; so just provision a VM and do a
 # docker --privileged run.
 host:
-  distro: fedora/26/atomic
+  distro: fedora/27/atomic
   specs:
     ram: 4096  # build-bundle is a static delta, which needs RAM right now
 
 tests:
-  - docker run --rm --privileged -v $(pwd):/srv/code registry.fedoraproject.org/fedora:26 /bin/sh -c "cd /srv/code && ./ci/flatpak.sh"
+  - docker run --rm --privileged -v $(pwd):/srv/code registry.fedoraproject.org/fedora:27 /bin/sh -c "cd /srv/code && ./ci/flatpak.sh"
 
 artifacts:
   - test-suite.log
diff --git a/ci/0001-tests-Fix-race-condition-in-tmp-webserver.patch b/ci/0001-tests-Fix-race-condition-in-tmp-webserver.patch
deleted file mode 100644
index dc66425f..00000000
--- a/ci/0001-tests-Fix-race-condition-in-tmp-webserver.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-From 6197e6922e3ba3c8881733a6a3253e8ae12eb538 Mon Sep 17 00:00:00 2001
-From: Colin Walters <walters@verbum.org>
-Date: Fri, 5 May 2017 16:36:04 -0400
-Subject: [PATCH] tests: Fix race condition in tmp webserver
-
-I was seeing this when trying to run flatpak's tests in ostree's CI:
-https://github.com/ostreedev/ostree/pull/824
-
-The race here is that the python process can still be writing to the output
-while sed is reading it, and hence we'll find a difference on the next line.
-Fix this by making a tmp copy of the file, which then both sed and cmp will
-read consistently.
-
-I'm not *entirely* sure this will fix the problem as I couldn't easily reproduce
-the race locally, but I believe it at least fixes *a* race.
----
- tests/test-webserver.sh | 12 +++++++++---
- 1 file changed, 9 insertions(+), 3 deletions(-)
-
-diff --git a/tests/test-webserver.sh b/tests/test-webserver.sh
-index 3291b06..2964ce9 100755
---- a/tests/test-webserver.sh
-+++ b/tests/test-webserver.sh
-@@ -10,9 +10,15 @@ env PYTHONUNBUFFERED=1 setsid python -m SimpleHTTPServer 0 >${test_tmpdir}/httpd
- child_pid=$!
- 
- for x in $(seq 50); do
--    sed -e 's,Serving HTTP on 0.0.0.0 port \([0-9]*\) \.\.\.,\1,' < ${test_tmpdir}/httpd-output > ${test_tmpdir}/httpd-port
--    if ! cmp ${test_tmpdir}/httpd-output ${test_tmpdir}/httpd-port 1>/dev/null; then
--        break
-+    # Snapshot the output
-+    cp ${test_tmpdir}/httpd-output{,.tmp}
-+    # If it's non-empty, see whether it matches our regexp
-+    if test -s ${test_tmpdir}/httpd-output.tmp; then
-+        sed -e 's,Serving HTTP on 0.0.0.0 port \([0-9]*\) \.\.\.,\1,' < ${test_tmpdir}/httpd-output.tmp > ${test_tmpdir}/httpd-port
-+        if ! cmp ${test_tmpdir}/httpd-output.tmp ${test_tmpdir}/httpd-port 1>/dev/null; then
-+            # If so, we've successfully extracted the port
-+            break
-+        fi
-     fi
-     sleep 0.1
- done
--- 
-2.9.3
diff --git a/ci/flatpak.sh b/ci/flatpak.sh
index 16812480..cdd03593 100755
--- a/ci/flatpak.sh
+++ b/ci/flatpak.sh
@@ -3,40 +3,37 @@
 
 set -xeuo pipefail
 
+# Frozen to a tag for now to help predictability; it's
+# also useful to test building *older* versions since
+# that must work.
+FLATPAK_TAG=0.10.2.1
+
 dn=$(dirname $0)
 . ${dn}/libbuild.sh
 
-build() {
-    env NOCONFIGURE=1 ./autogen.sh
-    ./configure --prefix=/usr --libdir=/usr/lib64 "$@"
-    make -j 8
-}
-
 codedir=$(pwd)
 
 pkg_upgrade
-# Core prep
-yum -y install dnf-plugins-core @buildsys-build 'dnf-command(builddep)'
-# build+install ostree, and build deps for both, so that our
-# make install overrides the ostree via rpm
-dnf builddep -y ostree flatpak
-yum -y install flatpak && rpm -e flatpak
-# we use yaml below
-yum -y install python3-PyYAML
+pkg_install_builddeps ostree
+pkg_install_builddeps flatpak
+pkg_install gettext-devel # A new dependency
+# Copy of builddeps from build.sh in flatpak
+pkg_install sudo which attr fuse \
+            libubsan libasan libtsan \
+            elfutils git gettext-devel libappstream-glib-devel \
+            /usr/bin/{update-mime-database,update-desktop-database,gtk-update-icon-cache} \
+            hicolor-icon-theme
+pkg_install flatpak && rpm -e flatpak
 
-# Now get flatpak's deps from rhci file
-tmpd=$(mktemp -d)
-cd ${tmpd}
-# Frozen to a tag for now on general principle
-git clone --recursive --depth=1 -b 0.9.3 https://github.com/flatpak/flatpak
-cd flatpak
-python3 -c 'import yaml; y = list(yaml.load_all(open(".redhat-ci.yml")))[0]; print("\0".join(y["packages"]))' | xargs -0 yum install -y
-# back to ostree and build
+# Build and install ostree
 cd ${codedir}
 build
 make install
+tmpd=$(mktemp -d)
+cd ${tmpd}
+# Frozen to a tag for now on general principle
+git clone --recursive --depth=1 -b ${FLATPAK_TAG} https://github.com/flatpak/flatpak
 cd ${tmpd}/flatpak
-patch -p1 < ${codedir}/ci/*.patch
 build
 # We want to capture automake results from flatpak
 cleanup() {