diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 24c7684..ac8aadd 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -37,9 +37,47 @@ jobs:
       #
       id: strings
       shell: bash
-      run: |
+      run: >
         echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
 
+    - name: Cache Google Test
+      id: cache-google-test
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-google-test-repo
+      with:
+        path: googletest
+        key: ${{ matrix.os }}-build-${{ env.cache-name }}
+
+    - name: Install Google Test
+      if: steps.cache-google-test.outputs.cache-hit != 'true'
+      run: |
+        mkdir gtest
+        git clone https://github.com/google/googletest.git benchmark
+        mkdir googletest/build
+        cd googletest/build
+        cmake ..
+        make install
+
+    - name: Cache Google Benchmark
+      id: cache-google-benchmark
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-google-benchmark-repo
+      with:
+        path: benchmark
+        key: ${{ matrix.os }}-build-${{ env.cache-name }}
+
+    - name: Install Google Benchmark
+      if: steps.cache-google-benchmark.outputs.cache-hit != 'true'
+      run: |
+        mkdir benchmark
+        git clone https://github.com/google/benchmark.git benchmark
+        mkdir benchmark/build
+        cd benchmark/build
+        cmake ..
+        make install
+
     - 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.