diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index 718d1dd7a1..1ad6b6f1f5 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -24,14 +24,14 @@ jobs:
             name: "Ubuntu Latest GCC", artifact: "Linux.tar.gz",
             os: ubuntu-latest,
             cc: "gcc", cxx: "g++",
-            cmake_flags: "-G Ninja",
+            cmake_flags: "-G Ninja -DENABLE_TESTING=ON ",
             cpack: "",
           }
         - {
             name: "macOS Latest Clang", artifact: "macOS.dmg",
             os: macos-latest,
             cc: "clang", cxx: "clang++",
-            cmake_flags: "-G Ninja",
+            cmake_flags: "-G Ninja -DENABLE_TESTING=ON ",
             cpack_flags: "-G DragNDrop",
           }
         - {
@@ -73,7 +73,6 @@ jobs:
       with:
         path: avogadrolibs
 
-    # this never seems to hit..
     - name: Cache Qt
       id: cache-qt
       uses: actions/cache@v1
@@ -87,29 +86,6 @@ jobs:
         cached: ${{ steps.cache-qt.outputs.cache-hit }}
         version: ${{ env.QT_VERSION }}
 
-    - name: Download ccache
-      id: ccache
-      shell: cmake -P {0}
-      run: |
-        set(ccache_url "https://github.com/cristianadam/ccache/releases/download/v$ENV{CCACHE_VERSION}/${{ runner.os }}.tar.xz")
-        file(DOWNLOAD "${ccache_url}" ./ccache.tar.xz SHOW_PROGRESS)
-        execute_process(COMMAND ${CMAKE_COMMAND} -E tar xvf ./ccache.tar.xz)
-
-    - name: Prepare ccache timestamp
-      id: ccache_cache_timestamp
-      shell: cmake -P {0}
-      run: |
-        string(TIMESTAMP current_date "%Y-%m-%d-%H;%M;%S" UTC)
-        message("::set-output name=timestamp::${current_date}")
-
-    - name: Restore cache files
-      uses: actions/cache@v1
-      with:
-        path: .ccache
-        key: ${{ matrix.config.name }}-ccache-${{ steps.ccache_cache_timestamp.outputs.timestamp }}
-        restore-keys: |
-          ${{ matrix.config.name }}-ccache-
-
     - name: Configure MSVC Command Prompt
       if: runner.os == 'Windows'
       uses: ilammy/msvc-dev-cmd@v1
@@ -120,14 +96,31 @@ jobs:
       run: |
         mkdir "${{ runner.workspace }}/build"
         cd "${{ runner.workspace }}/build"
-        CC=${{matrix.config.cc}} CXX=${{matrix.config.cxx}} cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} ${{matrix.config.cmake_flags}}
+        CC=${{matrix.config.cc}} CXX=${{matrix.config.cxx}} cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ${{matrix.config.cmake_flags}}
       shell: bash
 
     - name: Build
-      run: CC=${{matrix.config.cc}} CXX=${{matrix.config.cxx}} cmake --build . --config ${{env.BUILD_TYPE}}
+      run: |
+        CC=${{matrix.config.cc}} CXX=${{matrix.config.cxx}} cmake --build . --config ${{env.BUILD_TYPE}}
       shell: bash
       working-directory: ${{ runner.workspace }}/build
 
+    - name: Run tests
+      if: runner.os != 'Windows'
+      shell: cmake -P {0}
+      run: |
+        include(ProcessorCount)
+        ProcessorCount(N)
+        set(ENV{CTEST_OUTPUT_ON_FAILURE} "ON")
+        execute_process(
+          COMMAND ctest -j ${N}
+          WORKING_DIRECTORY ${{ runner.workspace }}/build
+          RESULT_VARIABLE result
+        )
+        if (NOT result EQUAL 0)
+          message(FATAL_ERROR "Running tests failed!")
+        endif()
+
     - name: Pack
       if: matrix.config.artifact != 0
       run: cpack ${{ matrix.config.cpack_flags }}