diff --git a/.github/workflows/CI_cmake.yml b/.github/workflows/CI_cmake.yml
new file mode 100644
index 0000000..c2dcbb4
--- /dev/null
+++ b/.github/workflows/CI_cmake.yml
@@ -0,0 +1,41 @@
+# This starter workflow is for a CMake project running on a single platform. There is a different starter workflow if you need cross-platform coverage.
+# See: https://github.com/actions/starter-workflows/blob/main/ci/cmake-multi-platform.yml
+name: CMake on a single platform
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Eigen
+      run: sudo apt install libeigen3-dev
+
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: cmake -B ${{github.workspace}}/build -DSPARSEIR_BUILD_TESTING=ON -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    - name: Build
+      # Build your program with the given configuration
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      # Execute tests defined by the CMake configuration.
+      # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
+      run: ctest -C ${{env.BUILD_TYPE}}
+
diff --git a/README.md b/README.md
index 360242d..5770b35 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # libsparseir
 
+[![CMake on a single platform](https://github.com/SpM-lab/libsparseir/actions/workflows/CI_cmake.yml/badge.svg)](https://github.com/SpM-lab/libsparseir/actions/workflows/CI_cmake.yml)
+
 > [!WARNING]
 > This C++ project is still under construction. Please use other repositories:
 > - https://github.com/SpM-lab/sparse-ir
diff --git a/test/_linalg.cxx b/test/_linalg.cxx
index 7b0a8e9..70fd63d 100644
--- a/test/_linalg.cxx
+++ b/test/_linalg.cxx
@@ -292,7 +292,6 @@ TEST_CASE("TSVD", "[linalg]") {
                 int k = s.size();
 
                 auto S_diag = s.asDiagonal();
-
                 auto Areconst = U * S_diag * V.transpose();
                 auto diff = (A - Areconst).norm() / A.norm();
                 // std::cout << "diff " << diff << std::endl;
@@ -301,7 +300,6 @@ TEST_CASE("TSVD", "[linalg]") {
                 // std::cout << "norm diff" << Aorig.norm() - Areconst.norm() << std::endl;
 
                 REQUIRE(Areconst.isApprox(Aorig, tol * Aorig.norm()));
-
                 REQUIRE((U.transpose() * U).isIdentity());
                 REQUIRE((V.transpose() * V).isIdentity());
                 REQUIRE(std::is_sorted(s.data(), s.data() + s.size(), std::greater<DDouble>()));