diff --git a/rclcpp_action/CMakeLists.txt b/rclcpp_action/CMakeLists.txt
index 48555ed81f..598f37a50f 100644
--- a/rclcpp_action/CMakeLists.txt
+++ b/rclcpp_action/CMakeLists.txt
@@ -103,6 +103,16 @@ if(BUILD_TESTING)
       ${PROJECT_NAME}
     )
   endif()
+
+  ament_add_gtest(test_types test/test_types.cpp)
+  if(TARGET test_types)
+    ament_target_dependencies(test_types
+      "test_msgs"
+    )
+    target_link_libraries(test_types
+      ${PROJECT_NAME}
+    )
+  endif()
 endif()
 
 ament_package()
diff --git a/rclcpp_action/test/test_client.cpp b/rclcpp_action/test/test_client.cpp
index 82a6dbda60..e89b19a470 100644
--- a/rclcpp_action/test/test_client.cpp
+++ b/rclcpp_action/test/test_client.cpp
@@ -270,6 +270,21 @@ TEST_F(TestClient, construction_and_destruction)
   ASSERT_NO_THROW(rclcpp_action::create_client<ActionType>(client_node, action_name).reset());
 }
 
+TEST_F(TestClient, construction_and_destruction_callback_group)
+{
+  auto group = client_node->create_callback_group(
+    rclcpp::CallbackGroupType::MutuallyExclusive);
+  ASSERT_NO_THROW(
+    rclcpp_action::create_client<ActionType>(
+      client_node->get_node_base_interface(),
+      client_node->get_node_graph_interface(),
+      client_node->get_node_logging_interface(),
+      client_node->get_node_waitables_interface(),
+      action_name,
+      group
+    ).reset());
+}
+
 TEST_F(TestClient, async_send_goal_no_callbacks)
 {
   auto action_client = rclcpp_action::create_client<ActionType>(client_node, action_name);
diff --git a/rclcpp_action/test/test_server.cpp b/rclcpp_action/test/test_server.cpp
index 8dd20828cd..7c873f5ee1 100644
--- a/rclcpp_action/test/test_server.cpp
+++ b/rclcpp_action/test/test_server.cpp
@@ -95,6 +95,32 @@ TEST_F(TestServer, construction_and_destruction)
   (void)as;
 }
 
+TEST_F(TestServer, construction_and_destruction_callback_group)
+{
+  auto node = std::make_shared<rclcpp::Node>("construct_node", "/rclcpp_action/construct");
+  auto group = node->create_callback_group(
+    rclcpp::CallbackGroupType::MutuallyExclusive);
+  const rcl_action_server_options_t & options = rcl_action_server_get_default_options();
+
+  using GoalHandle = rclcpp_action::ServerGoalHandle<Fibonacci>;
+  ASSERT_NO_THROW(
+    rclcpp_action::create_server<Fibonacci>(
+      node->get_node_base_interface(),
+      node->get_node_clock_interface(),
+      node->get_node_logging_interface(),
+      node->get_node_waitables_interface(),
+      "fibonacci",
+      [](const GoalUUID &, std::shared_ptr<const Fibonacci::Goal>) {
+        return rclcpp_action::GoalResponse::REJECT;
+      },
+      [](std::shared_ptr<GoalHandle>) {
+        return rclcpp_action::CancelResponse::REJECT;
+      },
+      [](std::shared_ptr<GoalHandle>) {},
+      options,
+      group));
+}
+
 TEST_F(TestServer, handle_goal_called)
 {
   auto node = std::make_shared<rclcpp::Node>("handle_goal_node", "/rclcpp_action/handle_goal");
diff --git a/rclcpp_action/test/test_types.cpp b/rclcpp_action/test/test_types.cpp
new file mode 100644
index 0000000000..f981261105
--- /dev/null
+++ b/rclcpp_action/test/test_types.cpp
@@ -0,0 +1,61 @@
+// Copyright 2020 Open Source Robotics Foundation, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <gtest/gtest.h>
+
+#include <limits>
+#include "rclcpp_action/types.hpp"
+
+TEST(TestActionTypes, goal_uuid_to_string) {
+  rclcpp_action::GoalUUID goal_id;
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    goal_id[i] = i;
+  }
+  EXPECT_STREQ("0123456789abcdef", rclcpp_action::to_string(goal_id).c_str());
+
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    goal_id[i] = 16u + i;
+  }
+  EXPECT_STREQ("101112131415161718191a1b1c1d1e1f", rclcpp_action::to_string(goal_id).c_str());
+
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    goal_id[i] = std::numeric_limits<uint8_t>::max() - i;
+  }
+  EXPECT_STREQ("fffefdfcfbfaf9f8f7f6f5f4f3f2f1f0", rclcpp_action::to_string(goal_id).c_str());
+}
+
+TEST(TestActionTypes, goal_uuid_to_rcl_action_goal_info) {
+  rclcpp_action::GoalUUID goal_id;
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    goal_id[i] = i;
+  }
+  rcl_action_goal_info_t goal_info = rcl_action_get_zero_initialized_goal_info();
+  rclcpp_action::convert(goal_id, &goal_info);
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    EXPECT_EQ(goal_info.goal_id.uuid[i], goal_id[i]);
+  }
+}
+
+TEST(TestActionTypes, rcl_action_goal_info_to_goal_uuid) {
+  rcl_action_goal_info_t goal_info = rcl_action_get_zero_initialized_goal_info();
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    goal_info.goal_id.uuid[i] = i;
+  }
+
+  rclcpp_action::GoalUUID goal_id;
+  rclcpp_action::convert(goal_id, &goal_info);
+  for (uint8_t i = 0; i < UUID_SIZE; ++i) {
+    EXPECT_EQ(goal_info.goal_id.uuid[i], goal_id[i]);
+  }
+}