diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 6496a56..4daccd0 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -16,5 +16,6 @@ jobs:
     uses: alpine-ros/alpine-ros-ci-workflows/.github/workflows/ros1.yaml@main
     with:
       enable-bot-comment: true
+      enable-codecov: true
     secrets:
       bot-comment-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100644
index 8abda1d..0000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-cmake_minimum_required(VERSION 3.1.3)
-project(sample_ros_pkg)
-
-find_package(catkin REQUIRED)
-catkin_package()
diff --git a/CHANGELOG.rst b/sample_ros_pkg/CHANGELOG.rst
similarity index 100%
rename from CHANGELOG.rst
rename to sample_ros_pkg/CHANGELOG.rst
diff --git a/sample_ros_pkg/CMakeLists.txt b/sample_ros_pkg/CMakeLists.txt
new file mode 100644
index 0000000..6c39073
--- /dev/null
+++ b/sample_ros_pkg/CMakeLists.txt
@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.1.3)
+project(sample_ros_pkg)
+
+find_package(catkin REQUIRED)
+catkin_package()
+
+include_directories(include)
+
+if(CATKIN_ENABLE_TESTING)
+  catkin_add_gtest(test_sample
+    test/src/test_sample.cpp
+    src/sample.cpp
+  )
+endif()
diff --git a/README.md b/sample_ros_pkg/README.md
similarity index 100%
rename from README.md
rename to sample_ros_pkg/README.md
diff --git a/sample_ros_pkg/codecov.yml b/sample_ros_pkg/codecov.yml
new file mode 100644
index 0000000..30b231e
--- /dev/null
+++ b/sample_ros_pkg/codecov.yml
@@ -0,0 +1,9 @@
+coverage:
+  status:
+    project:
+      default:
+        threshold: 5%
+    patch:
+      default:
+        target: 25%
+        only_pulls: true
diff --git a/sample_ros_pkg/include/sample.h b/sample_ros_pkg/include/sample.h
new file mode 100644
index 0000000..06ae34c
--- /dev/null
+++ b/sample_ros_pkg/include/sample.h
@@ -0,0 +1,4 @@
+#pragma once
+
+int sum(const int a, const int b);
+int mul(const int a, const int b);
diff --git a/package.xml b/sample_ros_pkg/package.xml
similarity index 100%
rename from package.xml
rename to sample_ros_pkg/package.xml
diff --git a/sample_ros_pkg/src/sample.cpp b/sample_ros_pkg/src/sample.cpp
new file mode 100644
index 0000000..f3413c3
--- /dev/null
+++ b/sample_ros_pkg/src/sample.cpp
@@ -0,0 +1,13 @@
+int sum(const int a, const int b)
+{
+  // covered
+  const int c = a + b;
+  return c;
+}
+
+int mul(const int a, const int b)
+{
+  // not covered
+  const int c = a * b;
+  return c;
+}
diff --git a/sample_ros_pkg/test/src/test_sample.cpp b/sample_ros_pkg/test/src/test_sample.cpp
new file mode 100644
index 0000000..1cc588f
--- /dev/null
+++ b/sample_ros_pkg/test/src/test_sample.cpp
@@ -0,0 +1,15 @@
+#include <gtest/gtest.h>
+
+#include <sample.h>
+
+TEST(Sum, Sum)
+{
+  ASSERT_EQ(sum(1, 2), 3);
+}
+
+int main(int argc, char** argv)
+{
+  testing::InitGoogleTest(&argc, argv);
+
+  return RUN_ALL_TESTS();
+}