diff --git a/.github/workflows/continuous.yml b/.github/workflows/continuous.yml
index 8722292..352d4ff 100644
--- a/.github/workflows/continuous.yml
+++ b/.github/workflows/continuous.yml
@@ -56,7 +56,8 @@ jobs:
         uses: actions/cache@v2
         with:
           path: ${{ env.CACHE_PATH }}
-          key: ${{ runner.os }}-${{ matrix.config }}-caceh
+          key: ${{ runner.os }}-${{ matrix.config }}-cache-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-${{ matrix.config }}-cache
 
       - name: Prepare ccache
         run: |
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
new file mode 100644
index 0000000..c0d598e
--- /dev/null
+++ b/.github/workflows/coverage.yml
@@ -0,0 +1,81 @@
+name: Coverage
+
+on:
+    push:
+      branches: [main]
+    pull_request:
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: ON
+  CTEST_PARALLEL_LEVEL: 2
+
+jobs:
+  Linux:
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        threading: [TBB]
+        include:
+          - os: ubuntu-latest
+            name: Linux
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v1
+        with:
+          fetch-depth: 10
+
+      - name: Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get -o Acquire::Retries=3 install \
+          libblas-dev \
+          libglu1-mesa-dev \
+          xorg-dev \
+          mpi \
+          lcov \
+          ccache
+          echo 'CACHE_PATH=~/.cache/ccache' >> "$GITHUB_ENV"
+
+      - name: Cache Build
+        id: cache-build
+        uses: actions/cache@v3
+        with:
+          path: ${{ env.CACHE_PATH }}
+          key: ${{ runner.os }}-Release-${{ matrix.threading }}-cache-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-Release-${{ matrix.threading }}-cache
+
+      - name: Prepare ccache
+        run: |
+          ccache --max-size=1.0G
+          ccache -V && ccache --show-stats && ccache --zero-stats
+
+      - name: Configure
+        run: |
+          mkdir -p build
+          cd build
+          cmake .. \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DPOLYSOLVE_CODE_COVERAGE=ON
+
+      - name: Build
+        run: cd build; make -j2; ccache --show-stats
+
+      - name: Run Coverage
+        run: |
+          cd build
+          ctest --verbose --output-on-failure
+          lcov --directory . --capture --output-file coverage.info
+          lcov --remove coverage.info '/usr/*' "${HOME}"'/.cache/*' '*tests/*.cpp' --output-file coverage.info
+
+      - name: Upload Coverage
+        uses: codecov/codecov-action@v3
+        with:
+            flags: polysolve # optional
+            files: coverage.info
+            name: polysolve # optional
+            fail_ci_if_error: false # optional (default = false)
+            verbose: true # optional (default = false)
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 83bff37..bbf763b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,6 +94,18 @@ option(POLYSOLVE_WITH_TESTS         "Build unit-tests"        ${POLYSOLVE_TOPLEV
 include(CMakeDependentOption)
 cmake_dependent_option(EIGEN_WITH_MKL "Use Eigen with MKL" ON "POLYSOLVE_WITH_MKL" OFF)
 
+option(POLYSOLVE_CODE_COVERAGE "Enable coverage reporting" OFF)
+
+add_library(polysolve_coverage_config INTERFACE)
+if(POLYSOLVE_CODE_COVERAGE AND CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+  # Add required flags (GCC & LLVM/Clang)
+  target_compile_options(polysolve_coverage_config INTERFACE
+    -g         # generate debug info
+    --coverage # sets all required flags
+  )
+  target_link_options(polysolve_coverage_config INTERFACE --coverage)
+endif()
+
 # Set default minimum C++ standard
 if(POLYSOLVE_TOPLEVEL_PROJECT)
     set(CMAKE_CXX_STANDARD 17)
@@ -141,6 +153,10 @@ add_library(polysolve)
 add_library(polysolve::polysolve ALIAS polysolve)
 add_subdirectory(src/polysolve/nonlinear)
 
+target_link_libraries(polysolve_linear PUBLIC polysolve_coverage_config)
+target_link_libraries(polysolve PUBLIC polysolve_coverage_config)
+
+
 
 target_compile_features(polysolve_linear PUBLIC cxx_std_17)
 target_compile_features(polysolve PUBLIC cxx_std_17)
diff --git a/README.md b/README.md
index 921da95..a600d49 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # PolySolve
 
 ![Build](https://github.com/polyfem/polysolve/workflows/Build/badge.svg)
+[![codecov](https://codecov.io/github/polyfem/polysolve/graph/badge.svg?token=9CTTZX9A2D)](https://codecov.io/github/polyfem/polysolve)
 
 This library contains a cross-platform Eigen wrapper for many different external linear solvers including (but not limited to):
 
diff --git a/cmake/recipes/blas.cmake b/cmake/recipes/blas.cmake
index f7e37f3..314fb98 100644
--- a/cmake/recipes/blas.cmake
+++ b/cmake/recipes/blas.cmake
@@ -19,8 +19,11 @@ if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm64" OR "${CMAKE_OSX_ARCHITECTURES}" M
     # Use Accelerate on macOS M1
     set(BLA_VENDOR Apple)
     find_package(BLAS REQUIRED)
-else()
-    # Use MKL on other platforms
+elseif(POLYSOLVE_WITH_MKL)
+    # Use MKL if enabled
     include(mkl)
     add_library(BLAS::BLAS ALIAS mkl::mkl)
+else()
+    # otherwise find system version
+    find_package(BLAS REQUIRED)
 endif()
diff --git a/cmake/recipes/lapack.cmake b/cmake/recipes/lapack.cmake
index fb372bc..f559182 100644
--- a/cmake/recipes/lapack.cmake
+++ b/cmake/recipes/lapack.cmake
@@ -19,8 +19,11 @@ if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm64" OR "${CMAKE_OSX_ARCHITECTURES}" M
     # Use Accelerate on macOS M1
     set(BLA_VENDOR Apple)
     find_package(LAPACK REQUIRED)
-else()
-    # Use MKL on other platforms
+elseif(POLYSOLVE_WITH_MKL)
+    # Use MKL if enabled
     include(mkl)
     add_library(LAPACK::LAPACK ALIAS mkl::mkl)
+else()
+    # otherwise find system version
+    find_package(LAPACK REQUIRED)
 endif()