diff --git a/scripts/container-manager.sh b/scripts/container-manager.sh
index e8b831d..ba708eb 100755
--- a/scripts/container-manager.sh
+++ b/scripts/container-manager.sh
@@ -95,7 +95,7 @@ start() {
 	fi
 
 	# Ensure FUSE support for user namespaces is enabled
-	echo Y > /sys/module/fuse/parameters/userns_mounts
+	echo Y | sudo tee /sys/module/fuse/parameters/userns_mounts || echo "WARNING: kernel doesn't support fuse in user namespaces"
 
 	exec $SNAP/usr/sbin/aa-exec -p unconfined -- $SNAP/bin/anbox-wrapper.sh container-manager
 }
diff --git a/snapcraft.yaml b/snapcraft.yaml
index 0bd0319..a9f4f7a 100644
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@@ -88,9 +88,6 @@ parts:
       # FIXME: Anbox currently has some paths with hard coded prefixes. Once
       # that is fixed we can avoid using a prefix here.
       - -DCMAKE_INSTALL_PREFIX:PATH=/usr
-      # FIXME: When building in release mode we get a lot of error which cause
-      # the build to fail.
-      - -DCMAKE_BUILD_TYPE=debug
     build-packages:
       - build-essential
       - cmake
@@ -104,6 +101,7 @@ parts:
       - libboost-iostreams-dev
       - libboost-program-options-dev
       - libboost-system-dev
+      - libboost-test-dev
       - libboost-thread-dev
       - libcap-dev
       - libdbus-1-dev
diff --git a/src/anbox/application/launcher_storage.cpp b/src/anbox/application/launcher_storage.cpp
index 988281a..ae036ef 100644
--- a/src/anbox/application/launcher_storage.cpp
+++ b/src/anbox/application/launcher_storage.cpp
@@ -48,10 +48,8 @@ void LauncherStorage::add(const Item &item) {
   auto package_name = item.package;
   std::replace(package_name.begin(), package_name.end(), '.', '-');
 
-  const auto item_path =
-      path_ / utils::string_format("anbox-%s.desktop", package_name);
-  const auto item_icon_path =
-      icon_path_ / utils::string_format("anbox-%s.png", package_name);
+  const auto item_path = path_ / utils::string_format("anbox-%s.desktop", package_name);
+  const auto item_icon_path = icon_path_ / utils::string_format("anbox-%s.png", package_name);
 
   std::string exec = utils::string_format("%s launch ", utils::process_get_exe_path(getpid()));
 
@@ -68,21 +66,23 @@ void LauncherStorage::add(const Item &item) {
     exec += utils::string_format("--package=%s ", item.launch_intent.package);
 
   if (!item.launch_intent.component.empty())
-    exec +=
-        utils::string_format("--component=%s ", item.launch_intent.component);
+    exec += utils::string_format("--component=%s ", item.launch_intent.component);
 
-  std::ofstream f(item_path.string());
-  f << "[Desktop Entry]" << std::endl
-    << "Name=" << item.package << std::endl
-    << "Exec=" << exec << std::endl
-    << "Terminal=false" << std::endl
-    << "Type=Application" << std::endl
-    << "Icon=" << item_icon_path.string() << std::endl;
-  f.close();
+  if (auto desktop_item = std::ofstream(item_path.string())) {
+    desktop_item << "[Desktop Entry]" << std::endl
+                 << "Name=" << item.package << std::endl
+                 << "Exec=" << exec << std::endl
+                 << "Terminal=false" << std::endl
+                 << "Type=Application" << std::endl
+                 << "Icon=" << item_icon_path.string() << std::endl;
+  } else {
+    BOOST_THROW_EXCEPTION(std::runtime_error("Failed to create desktop item"));
+  }
 
-  f = std::ofstream(item_icon_path.string());
-  f.write(item.icon.data(), item.icon.size());
-  f.close();
+  if (auto icon = std::ofstream(item_icon_path.string()))
+    icon.write(item.icon.data(), item.icon.size());
+  else
+    BOOST_THROW_EXCEPTION(std::runtime_error("Failed to write icon"));
 }
 }  // namespace application
 }  // namespace anbox
diff --git a/src/anbox/cmds/run.cpp b/src/anbox/cmds/run.cpp
index 870cd50..dc701db 100644
--- a/src/anbox/cmds/run.cpp
+++ b/src/anbox/cmds/run.cpp
@@ -81,9 +81,6 @@ anbox::cmds::Run::Run(const BusFactory &bus_factory)
   flag(cli::make_flag(cli::Name{"desktop_file_hint"},
                       cli::Description{"Desktop file hint for QtMir/Unity8"},
                       desktop_file_hint_));
-  flag(cli::make_flag(cli::Name{"icon"},
-                      cli::Description{"Icon of the application to run"},
-                      icon_));
 
   action([this](const cli::Command::Context &) {
     auto trap = core::posix::trap_signals_for_process(
diff --git a/src/anbox/cmds/run.h b/src/anbox/cmds/run.h
index 7e14a18..d0b3ec3 100644
--- a/src/anbox/cmds/run.h
+++ b/src/anbox/cmds/run.h
@@ -39,7 +39,6 @@ class Run : public cli::CommandWithFlagsAndAction {
  private:
   BusFactory bus_factory_;
   std::string desktop_file_hint_;
-  std::string icon_;
 };
 }  // namespace cmds
 }  // namespace anbox
diff --git a/tests/anbox/graphics/buffered_io_stream_tests.cpp b/tests/anbox/graphics/buffered_io_stream_tests.cpp
index 1a37986..4008586 100644
--- a/tests/anbox/graphics/buffered_io_stream_tests.cpp
+++ b/tests/anbox/graphics/buffered_io_stream_tests.cpp
@@ -51,7 +51,7 @@ TEST(BufferedIOStream, CommitBufferWritesOutToMessenger) {
   auto messenger = std::make_shared<MockSocketMessenger>();
   BufferedIOStream stream(messenger);
 
-  const auto buffer_size{1000};
+  const size_t buffer_size{1000};
   // We will write out the data we get in two junks of half the size
   // the original buffer has.
   EXPECT_CALL(*messenger, send_raw(_, buffer_size))
@@ -75,8 +75,8 @@ TEST(BufferedIOStream, WriterContinuesWhenSocketIsBusy) {
   auto messenger = std::make_shared<MockSocketMessenger>();
   BufferedIOStream stream(messenger);
 
-  const auto buffer_size{1000};
-  const auto first_chunk_size{100};
+  const size_t buffer_size{1000};
+  const size_t first_chunk_size{100};
   // The writer will check the error code of the send function
   // and will retry writing the next chunk when it doesn't get
   // EAGAIN anymore from the sender.