diff --git a/.github/actions/linux/build-libmongoc/action.yml b/.github/actions/linux/build-libmongoc/action.yml
new file mode 100644
index 000000000..6a804078a
--- /dev/null
+++ b/.github/actions/linux/build-libmongoc/action.yml
@@ -0,0 +1,55 @@
+name: "Build libmongoc"
+description: "Builds and install libmongoc"
+inputs:
+  prefix:
+    description: "Prefix to install libmongoc to"
+    default: "/usr/local"
+  version:
+    description: "Libmongoc version to build"
+    required: true
+runs:
+  using: composite
+
+  steps:
+    - name: Download libmongoc
+      shell: bash
+      working-directory: /tmp
+      run: wget "https://github.com/mongodb/mongo-c-driver/archive/refs/tags/${LIBMONGOC_VERSION}.tar.gz" --output-document="mongo-c-driver.tar.gz"
+      env:
+        LIBMONGOC_VERSION: ${{ inputs.version }}
+
+    - name: Extract libmongoc
+      shell: bash
+      working-directory: /tmp
+      run: tar xf "mongo-c-driver.tar.gz"
+
+    - name: Configure cmake
+      shell: bash
+      working-directory: /tmp
+      run: |
+        cmake \
+          -S "mongo-c-driver-${LIBMONGOC_VERSION}" \
+          -B _build \
+          -D CMAKE_BUILD_TYPE=RelWithDebInfo \
+          -D BUILD_VERSION="${LIBMONGOC_VERSION}" \
+          -D ENABLE_MONGOC=ON \
+          -D ENABLE_TRACING=ON \
+          -D ENABLE_CLIENT_SIDE_ENCRYPTION=ON
+      env:
+        LIBMONGOC_VERSION: ${{ inputs.version }}
+
+    - name: Build libmongoc
+      shell: bash
+      working-directory: /tmp
+      run: cmake --build _build --config RelWithDebInfo --parallel
+
+    - name: Install libmongoc
+      shell: bash
+      working-directory: /tmp
+      run: sudo cmake --install _build --prefix "${PREFIX}" --config RelWithDebInfo
+      env:
+        PREFIX: ${{ inputs.prefix }}
+
+    - name: Check pkg-config availability
+      shell: bash
+      run: pkg-config --modversion mongoc2
diff --git a/.github/actions/linux/build-libmongocrypt/action.yml b/.github/actions/linux/build-libmongocrypt/action.yml
new file mode 100644
index 000000000..04c12509e
--- /dev/null
+++ b/.github/actions/linux/build-libmongocrypt/action.yml
@@ -0,0 +1,29 @@
+name: "Build libmongocrypt"
+description: "Installs libmongocrypt"
+inputs:
+  version:
+    description: "Libmongocrypt version to install (major.minor)"
+    required: true
+runs:
+  using: composite
+
+  steps:
+    - name: Add repository key
+      shell: bash
+      run: sudo sh -c 'curl -s --location https://pgp.mongodb.com/libmongocrypt.asc | gpg --dearmor >/etc/apt/trusted.gpg.d/libmongocrypt.gpg'
+
+    - name: Add repository
+      shell: bash
+      working-directory: /tmp
+      # Note: no packages for Ubuntu 24.04 noble exist, so we use those for 22.04
+      run: echo "deb https://libmongocrypt.s3.amazonaws.com/apt/ubuntu jammy/libmongocrypt/${LIBMONGOCRYPT_VERSION} universe" | sudo tee /etc/apt/sources.list.d/libmongocrypt.list
+      env:
+        LIBMONGOCRYPT_VERSION: ${{ inputs.version }}
+
+    - name: Update apt sources
+      shell: bash
+      run: sudo apt-get update
+
+    - name: Install libmongocrypt
+      shell: bash
+      run: sudo apt-get install -y libmongocrypt-dev
diff --git a/.github/actions/linux/build/action.yml b/.github/actions/linux/build/action.yml
index a66462268..20378e2a7 100644
--- a/.github/actions/linux/build/action.yml
+++ b/.github/actions/linux/build/action.yml
@@ -4,6 +4,10 @@ inputs:
   version:
     description: "PHP version to build for"
     required: true
+  configureOpts:
+    description: "Extra options to use for the call to ./configure"
+    default: ""
+
 runs:
   using: composite
   steps:
@@ -17,6 +21,8 @@ runs:
     - name: "Configure driver"
       run: .github/workflows/configure.sh
       shell: bash
+      env:
+        CONFIGURE_OPTS: ${{ inputs.configureOpts }}
 
     - name: "Build driver"
       run: "make all"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ac706fa3e..29c74c922 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -128,3 +128,54 @@ jobs:
         php: [ "8.1", "8.2", "8.3", "8.4" ]
         arch: [ x64, x86 ]
         ts: [ ts, nts ]
+
+  test-system-libs:
+    name: "System Library Tests"
+    runs-on: "ubuntu-latest"
+    env:
+      PHP_VERSION: "8.3"
+      LIBMONGOCRYPT_VERSION: "1.14"
+      LIBMONGOC_VERSION: "2.0.1"
+      SERVER_VERSION: "8.0"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v4"
+        with:
+          submodules: true
+
+      - name: "Install libmongocrypt"
+        uses: ./.github/actions/linux/build-libmongocrypt
+        with:
+          version: ${{ env.LIBMONGOCRYPT_VERSION }}
+
+      - name: "Build libmongoc"
+        uses: ./.github/actions/linux/build-libmongoc
+        with:
+          version: ${{ env.LIBMONGOC_VERSION }}
+
+      - name: "Build Driver"
+        uses: ./.github/actions/linux/build
+        with:
+          version: ${{ env.PHP_VERSION }}
+          configureOpts: "--with-mongodb-system-libs=yes"
+
+      - name: "Check driver version"
+        shell: bash
+        run: make show-config
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Setup MongoDB
+        id: setup-mongodb
+        uses: ./tests/drivers-evergreen-tools
+        with:
+          version: ${{ ENV.SERVER_VERSION }}
+          topology: "server"
+
+      - name: "Run Tests"
+        run: TEST_PHP_ARGS="-q -x --show-diff -g FAIL,XFAIL,BORK,WARN,LEAK,SKIP" make test
+        env:
+          MONGODB_URI: ${{ steps.setup-mongodb.outputs.cluster-uri }}
diff --git a/Makefile.frag b/Makefile.frag
index c1f83b808..46eb786af 100644
--- a/Makefile.frag
+++ b/Makefile.frag
@@ -1,4 +1,4 @@
-.PHONY: mv-coverage lcov-coveralls lcov-local coverage coveralls format format-changed format-check test-clean package package.xml libmongocrypt-version-current generate-function-map
+.PHONY: mv-coverage lcov-coveralls lcov-local coverage coveralls format format-changed format-check test-clean package package.xml libmongocrypt-version-current generate-function-map show-config
 
 ifneq (,$(realpath $(EXTENSION_DIR)/json.so))
 PHP_TEST_SHARED_EXTENSIONS := "-d" "extension=$(EXTENSION_DIR)/json.so" $(PHP_TEST_SHARED_EXTENSIONS)
@@ -88,6 +88,28 @@ generate-function-map: all
 		echo "ERROR: Cannot generate function maps without CLI sapi."; \
 	fi
 
+show-config: all
+	@if test ! -z "$(PHP_EXECUTABLE)" && test -x "$(PHP_EXECUTABLE)"; then \
+		INI_FILE=`$(PHP_EXECUTABLE) -d 'display_errors=stderr' -r 'echo php_ini_loaded_file();' 2> /dev/null`; \
+		if test "$$INI_FILE"; then \
+			$(EGREP) -h -v $(PHP_DEPRECATED_DIRECTIVES_REGEX) "$$INI_FILE" > $(top_builddir)/tmp-php.ini; \
+		else \
+			echo > $(top_builddir)/tmp-php.ini; \
+		fi; \
+		INI_SCANNED_PATH=`$(PHP_EXECUTABLE) -d 'display_errors=stderr' -r '$$a = explode(",\n", trim(php_ini_scanned_files())); echo $$a[0];' 2> /dev/null`; \
+		if test "$$INI_SCANNED_PATH"; then \
+			INI_SCANNED_PATH=`$(top_srcdir)/build/shtool path -d $$INI_SCANNED_PATH`; \
+			$(EGREP) -h -v $(PHP_DEPRECATED_DIRECTIVES_REGEX) "$$INI_SCANNED_PATH"/*.ini >> $(top_builddir)/tmp-php.ini; \
+		fi; \
+		CC="$(CC)" \
+			$(PHP_EXECUTABLE) -n -c $(top_builddir)/tmp-php.ini -d extension_dir=$(top_builddir)/modules/ $(PHP_TEST_SHARED_EXTENSIONS) --ri mongodb; \
+		RESULT_EXIT_CODE=$$?; \
+		rm $(top_builddir)/tmp-php.ini; \
+		exit $$RESULT_EXIT_CODE; \
+	else \
+		echo "ERROR: Cannot show config without CLI sapi."; \
+	fi
+
 test-no-build:
 	@if test ! -z "$(PHP_EXECUTABLE)" && test -x "$(PHP_EXECUTABLE)"; then \
 		INI_FILE=`$(PHP_EXECUTABLE) -d 'display_errors=stderr' -r 'echo php_ini_loaded_file();' 2> /dev/null`; \