diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5955909da..f4b321ffa 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,6 +21,7 @@ jobs:
       - python-integration
       - ruby-integration
       - dotnet-integration
+      - rust-cargo-lambda-integration
     steps:
       - name: report-failure
         if: |
@@ -33,7 +34,8 @@ jobs:
           needs.custom-make-integration.result != 'success' ||
           needs.python-integration.result != 'success' ||
           needs.ruby-integration.result != 'success' ||
-          needs.dotnet-integration.result != 'success'
+          needs.dotnet-integration.result != 'success' ||
+          needs.rust-cargo-lambda-integration.result != 'success'
         run: exit 1
       - name: report-success
         run: exit 0
@@ -296,3 +298,57 @@ jobs:
           python-version: ${{ matrix.python }}
       - run: make init
       - run: pytest -vv tests/integration/workflows/dotnet_clipackage
+
+  rust-cargo-lambda-integration:
+    name: ${{ matrix.os }} / ${{ matrix.python }} / rust-cargo-lambda
+    if: github.repository_owner == 'aws'
+    runs-on: ${{ matrix.os }}
+    env:
+      CARGO_LAMBDA_VERSION: 0.15.0
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+        python:
+          - "3.9"
+          - "3.8"
+          - "3.7"
+        rust:
+          - stable
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+
+      # Install and configure Rust
+      - name: Install rustup
+        run: |
+          : install rustup if needed
+          if ! command -v rustup &> /dev/null ; then
+            curl --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused -fsSL "https://sh.rustup.rs" | sh -s -- --default-toolchain none -y
+            echo "${CARGO_HOME:-$HOME/.cargo}/bin" >> $GITHUB_PATH
+          fi
+        if: ${{ matrix.os }} == 'ubuntu-latest'
+      - name: rustup toolchain install ${{ matrix.rust }}
+        run: rustup toolchain install ${{ matrix.rust }} --profile minimal --no-self-update
+      - run: rustup default ${{ matrix.rust }}
+      - run: |
+          : disable incremental compilation
+          echo CARGO_INCREMENTAL=0 >> $GITHUB_ENV
+      - run: |
+          : enable colors in Cargo output
+          echo CARGO_TERM_COLOR=always >> $GITHUB_ENV
+
+      # Install and configure Cargo Lambda
+      - name: Install Cargo Lambda
+        run: pip install cargo-lambda==$CARGO_LAMBDA_VERSION
+      - run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - run: make init
+      - run: pytest -vv tests/integration/workflows/rust_cargo
diff --git a/Makefile b/Makefile
index 7b4b49ec5..a4b44ad32 100644
--- a/Makefile
+++ b/Makefile
@@ -2,10 +2,13 @@ init:
 	LAMBDA_BUILDERS_DEV=1 pip install -e '.[dev]'
 
 test:
-	# Run unit tests
+	# Run unit and functional tests
 	# Fail if coverage falls below 94%
 	LAMBDA_BUILDERS_DEV=1 pytest -vv --cov aws_lambda_builders --cov-report term-missing --cov-fail-under 94 tests/unit tests/functional
 
+unit-test:
+	LAMBDA_BUILDERS_DEV=1 pytest tests/unit
+
 func-test:
 	LAMBDA_BUILDERS_DEV=1 pytest tests/functional
 
diff --git a/README.md b/README.md
index 5b8db24c5..c7528017c 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Lambda Builders currently contains the following workflows
 * Typescript with esbuild
 * Ruby with Bundler
 * Go with Mod
+* Rust with Cargo
 
 In Addition to above workflows, AWS Lambda Builders also supports *Custom Workflows* through a Makefile.
 
diff --git a/aws_lambda_builders/workflows/__init__.py b/aws_lambda_builders/workflows/__init__.py
index 4f7402492..6966c0758 100644
--- a/aws_lambda_builders/workflows/__init__.py
+++ b/aws_lambda_builders/workflows/__init__.py
@@ -11,3 +11,4 @@
 import aws_lambda_builders.workflows.dotnet_clipackage
 import aws_lambda_builders.workflows.custom_make
 import aws_lambda_builders.workflows.nodejs_npm_esbuild
+import aws_lambda_builders.workflows.rust_cargo
diff --git a/aws_lambda_builders/workflows/rust_cargo/DESIGN.md b/aws_lambda_builders/workflows/rust_cargo/DESIGN.md
new file mode 100644
index 000000000..4b504503d
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/DESIGN.md
@@ -0,0 +1,28 @@
+# Rust Cargo Builder
+
+## Scope
+
+This package enables the creation of a Lambda deployment package for Rust projects managed using the [cargo](https://doc.rust-lang.org/cargo/) build tool targeting Lambda's "provided" runtime. Rust support for the provided runtime is bundled as a compilation dependency of these projects, provided by the [lambda](https://github.com/awslabs/aws-lambda-rust-runtime) crate.
+
+## Implementation
+
+This package uses [Cargo Lambda](https://www.cargo-lambda.info) to do all the heavy lifting for cross compilation, target validation, and other executable optimizations.
+
+It supports X86-64 architectures with the target `x86_64-unknown-linux-gnu` by default. It also supports ARM architectures with the target option `aarch64-unknown-linux-gnu`. Those are the only two valid targets. The target is automatically configured based on the `architecture` option in the `RustCargoLambdaWorkflow`.
+
+The general algorithm for preparing a rust executable for use on AWS Lambda is as follows.
+
+### Build
+
+It builds a binary in the standard cargo target directory. The binary's name is always `bootstrap`, and it's always located under `target/lambda/HANDLER_NAME/bootstrap`.
+
+### Copy and Rename executable
+
+It then copies the executable to the target directory honoring the provided runtime's [expectation on executable names](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-custom.html).
+
+## Notes
+
+Like the go builders, the workflow argument `options.artifact_executable_name`
+interface can used to provide a handler name that resolves to an executable. This
+enables sam support for cargo workspaces allowing for one rust project to have multiple lambdas. Cargo workspaces have a notion of a `package` and `bin`. A `package` can have
+multiple bins but typically `packages` have a 1-to-1 relationship with a default `bin`: `main.rs`. The handler names must be uniques across a Rust project, regardless of how many packages and binaries that project includes.
diff --git a/aws_lambda_builders/workflows/rust_cargo/__init__.py b/aws_lambda_builders/workflows/rust_cargo/__init__.py
new file mode 100644
index 000000000..149e66e07
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/__init__.py
@@ -0,0 +1,5 @@
+"""
+Builds Rust Lambda functions using Cargo Lambda
+"""
+
+from .workflow import RustCargoLambdaWorkflow
diff --git a/aws_lambda_builders/workflows/rust_cargo/actions.py b/aws_lambda_builders/workflows/rust_cargo/actions.py
new file mode 100644
index 000000000..c585594c8
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/actions.py
@@ -0,0 +1,146 @@
+"""
+Rust Cargo build actions
+"""
+
+import logging
+import os
+
+from aws_lambda_builders.workflow import BuildMode
+from aws_lambda_builders.actions import ActionFailedError, BaseAction, Purpose
+from aws_lambda_builders.architecture import X86_64, ARM64
+from .exceptions import CargoLambdaExecutionException
+from .utils import OSUtils
+
+
+LOG = logging.getLogger(__name__)
+
+
+class RustCargoLambdaBuildAction(BaseAction):
+    NAME = "CargoLambdaBuild"
+    DESCRIPTION = "Building the project using Cargo Lambda"
+    PURPOSE = Purpose.COMPILE_SOURCE
+
+    def __init__(
+        self,
+        source_dir,
+        binaries,
+        mode,
+        subprocess_cargo_lambda,
+        architecture=X86_64,
+        handler=None,
+        flags=None,
+    ):
+        """
+        Build the a Rust executable
+
+        :type source_dir: str
+        :param source_dir:
+            Path to a folder containing the source code
+
+        :type binaries: dict
+        :param binaries:
+            Resolved path dependencies
+
+        :type mode: str
+        :param mode:
+            Mode the build should produce
+
+        :type architecture: str, optional
+        :param architecture:
+            Target architecture to build the binary, either arm64 or x86_64
+
+        :type handler: str, optional
+        :param handler:
+            Handler name in `bin_name` format
+
+        :type flags: list, optional
+        :param flags:
+            Extra list of flags to pass to `cargo lambda build`
+
+        :type subprocess_cargo_lambda: aws_lambda_builders.workflows.rust_cargo.cargo_lambda.SubprocessCargoLambda
+        :param subprocess_cargo_lambda: An instance of the Cargo Lambda process wrapper
+        """
+
+        self._source_dir = source_dir
+        self._mode = mode
+        self._binaries = binaries
+        self._handler = handler
+        self._flags = flags
+        self._architecture = architecture
+        self._subprocess_cargo_lambda = subprocess_cargo_lambda
+
+    def build_command(self):
+        cmd = [self._binaries["cargo"].binary_path, "lambda", "build"]
+        if self._mode != BuildMode.DEBUG:
+            cmd.append("--release")
+        if self._architecture == ARM64:
+            cmd.append("--arm64")
+        if self._handler:
+            cmd.extend(["--bin", self._handler])
+        if self._flags:
+            cmd.extend(self._flags)
+
+        return cmd
+
+    def execute(self):
+        try:
+            return self._subprocess_cargo_lambda.run(command=self.build_command(), cwd=self._source_dir)
+        except CargoLambdaExecutionException as ex:
+            raise ActionFailedError(str(ex))
+
+
+class RustCopyAndRenameAction(BaseAction):
+    NAME = "RustCopyAndRename"
+    DESCRIPTION = "Copy Rust executable, renaming if needed"
+    PURPOSE = Purpose.COPY_SOURCE
+
+    def __init__(self, source_dir, artifacts_dir, handler=None, osutils=OSUtils()):
+        """
+        Copy and rename Rust executable
+
+        Parameters
+        ----------
+        source_dir : str
+            Path to a folder containing the source code
+
+        artifacts_dir : str
+            Path to a folder containing the deployable artifacts
+
+        handler : str, optional
+            Handler name in `package.bin_name` or `bin_name` format
+
+        osutils : aws_lambda_builders.workflows.rust_cargo.utils.OSUtils, optional
+            Optional, External IO utils
+        """
+        self._source_dir = source_dir
+        self._handler = handler
+        self._artifacts_dir = artifacts_dir
+        self._osutils = osutils
+
+    def base_path(self):
+        return os.path.join(self._source_dir, "target", "lambda")
+
+    def binary_path(self):
+        base = self.base_path()
+        if self._handler:
+            binary_path = os.path.join(base, self._handler, "bootstrap")
+            LOG.debug("copying function binary from %s", binary_path)
+            return binary_path
+
+        output = os.listdir(base)
+        if len(output) == 1:
+            binary_path = os.path.join(base, output[0], "bootstrap")
+            LOG.debug("copying function binary from %s", binary_path)
+            return binary_path
+
+        LOG.warning("unexpected list of binary directories: [%s]", ", ".join(output))
+        raise CargoLambdaExecutionException(
+            message="unable to find function binary, use the option `artifact_executable_name` to specify the name"
+        )
+
+    def execute(self):
+        self._osutils.makedirs(self._artifacts_dir)
+        binary_path = self.binary_path()
+        destination_path = os.path.join(self._artifacts_dir, "bootstrap")
+        LOG.debug("copying function binary from %s to %s", binary_path, destination_path)
+        self._osutils.copyfile(binary_path, destination_path)
diff --git a/aws_lambda_builders/workflows/rust_cargo/cargo_lambda.py b/aws_lambda_builders/workflows/rust_cargo/cargo_lambda.py
new file mode 100644
index 000000000..0facf0286
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/cargo_lambda.py
@@ -0,0 +1,131 @@
+"""
+Wrapper around calling Cargo Lambda through a subprocess.
+"""
+import io
+import logging
+import os
+import subprocess
+import shutil
+import threading
+
+from .exceptions import CargoLambdaExecutionException
+from .utils import OSUtils
+
+
+LOG = logging.getLogger(__name__)
+
+
+class SubprocessCargoLambda(object):
+    """
+    Wrapper around the Cargo Lambda command line utility, making it
+    easy to consume execution results.
+    """
+
+    def __init__(self, which, executable_search_paths=None, osutils=OSUtils()):
+        """
+        Parameters
+        ----------
+        which : aws_lambda_builders.utils.which
+            Function to get paths which conform to the given mode on the PATH
+            with the prepended additional search paths
+
+        executable_search_paths : list, optional
+            List of paths to the NPM package binary utilities. This will
+            be used to find embedded esbuild at runtime if present in the package
+
+        osutils : aws_lambda_builders.workflows.rust_cargo.utils.OSUtils, optional
+            An instance of OS Utilities for file manipulation
+        """
+        self._which = which
+        self._executable_search_paths = executable_search_paths
+        self._osutils = osutils
+
+    def check_cargo_lambda_installation(self):
+        """
+        Checks if Cargo Lambda is in the system
+
+        Returns
+        -------
+        str
+            Path to the cargo-lambda binary
+
+        Raises
+        ------
+        CargoLambdaExecutionException:
+            Raised when Cargo Lambda is not installed in the system to run the command.
+        """
+
+        LOG.debug("checking for cargo-lambda")
+        binaries = self._which("cargo-lambda", executable_search_paths=self._executable_search_paths)
+        LOG.debug("potential cargo-lambda binaries: %s", binaries)
+
+        if binaries:
+            return binaries[0]
+        else:
+            raise CargoLambdaExecutionException(
+                message="Cannot find Cargo Lambda. "
+                "Cargo Lambda must be installed on the host machine to use this feature. "
+                "Follow the gettings started guide to learn how to install it: "
+                "https://www.cargo-lambda.info/guide/getting-started.html"
+            )
+
+    def run(self, command, cwd):
+        """
+        Runs the build command.
+
+        Parameters
+        ----------
+        command : str
+            Cargo Lambda command to run
+
+        cwd : str
+            Directory where to execute the command (defaults to current dir)
+
+        Returns
+        -------
+        str
+            Text of the standard output from the command
+
+        Raises
+        ------
+        CargoLambdaExecutionException:
+            Raised when the command executes with a non-zero return code. The exception will
+            contain the text of the standard error output from the command.
+        """
+
+        self.check_cargo_lambda_installation()
+
+        LOG.debug("Executing cargo-lambda: %s", " ".join(command))
+        if LOG.isEnabledFor(logging.DEBUG):
+            if "RUST_LOG" not in os.environ:
+                os.environ["RUST_LOG"] = "debug"
+            LOG.debug("RUST_LOG environment variable set to `%s`", os.environ.get("RUST_LOG"))
+        cargo_process = self._osutils.popen(
+            command,
+            stderr=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+            cwd=cwd,
+        )
+        stdout = ""
+        # Create a buffer and use a thread to gather the stderr stream into the buffer
+        stderr_buf = io.BytesIO()
+        stderr_thread = threading.Thread(
+            target=shutil.copyfileobj, args=(cargo_process.stderr, stderr_buf), daemon=True
+        )
+        stderr_thread.start()
+
+        # Log every stdout line by iterating
+        for line in cargo_process.stdout:
+            decoded_line = line.decode("utf-8").strip()
+            LOG.info(decoded_line)
+            # Gather total stdout
+            stdout += decoded_line
+
+        # Wait for the process to exit and stderr thread to end.
+        return_code = cargo_process.wait()
+        stderr_thread.join()
+
+        if return_code != 0:
+            # Raise an Error with the appropriate value from the stderr buffer.
+            raise CargoLambdaExecutionException(message=stderr_buf.getvalue().decode("utf8").strip())
+        return stdout
diff --git a/aws_lambda_builders/workflows/rust_cargo/exceptions.py b/aws_lambda_builders/workflows/rust_cargo/exceptions.py
new file mode 100644
index 000000000..39d6a02dd
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/exceptions.py
@@ -0,0 +1,14 @@
+"""
+Cargo Lambda specific exceptions
+"""
+
+from aws_lambda_builders.exceptions import LambdaBuilderError
+
+
+class CargoLambdaExecutionException(LambdaBuilderError):
+    """
+    Exception raised in case Cargo Lambda execution fails.
+    It will pass on the standard error output from the Cargo Lambda console.
+    """
+
+    MESSAGE = "Cargo Lambda failed: {message}"
diff --git a/aws_lambda_builders/workflows/rust_cargo/feature_flag.py b/aws_lambda_builders/workflows/rust_cargo/feature_flag.py
new file mode 100644
index 000000000..fca068225
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/feature_flag.py
@@ -0,0 +1,12 @@
+"""
+Cargo Lambda specific feature flag utilities
+"""
+
+EXPERIMENTAL_FLAG_CARGO_LAMBDA = "experimentalCargoLambda"
+
+
+def is_experimental_cargo_lambda_scope(experimental_flags):
+    """
+    A function which will determine if experimental Cargo Lambda scope is active
+    """
+    return bool(experimental_flags) and EXPERIMENTAL_FLAG_CARGO_LAMBDA in experimental_flags
diff --git a/aws_lambda_builders/workflows/rust_cargo/utils.py b/aws_lambda_builders/workflows/rust_cargo/utils.py
new file mode 100644
index 000000000..99aed66ab
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/utils.py
@@ -0,0 +1,20 @@
+import os
+import subprocess
+import shutil
+
+
+class OSUtils(object):
+    """
+    Wrapper around file system functions, to make it easy to
+    unit test actions in memory
+    """
+
+    def popen(self, command, stdout=None, stderr=None, env=None, cwd=None):
+        return subprocess.Popen(command, stdout=stdout, stderr=stderr, env=env, cwd=cwd)
+
+    def copyfile(self, source, destination):
+        shutil.copy2(source, destination)
+
+    def makedirs(self, path):
+        if not os.path.exists(path):
+            os.makedirs(path)
diff --git a/aws_lambda_builders/workflows/rust_cargo/workflow.py b/aws_lambda_builders/workflows/rust_cargo/workflow.py
new file mode 100644
index 000000000..dcd971c65
--- /dev/null
+++ b/aws_lambda_builders/workflows/rust_cargo/workflow.py
@@ -0,0 +1,59 @@
+"""
+Rust Cargo Workflow
+"""
+
+from aws_lambda_builders.utils import which
+from aws_lambda_builders.path_resolver import PathResolver
+from aws_lambda_builders.workflow import BaseWorkflow, Capability, BuildInSourceSupport, BuildDirectory
+from .actions import RustCargoLambdaBuildAction, RustCopyAndRenameAction
+from .cargo_lambda import SubprocessCargoLambda
+from .exceptions import CargoLambdaExecutionException
+from .feature_flag import is_experimental_cargo_lambda_scope
+
+
+class RustCargoLambdaWorkflow(BaseWorkflow):
+    NAME = "RustCargoLambdaBuilder"
+
+    CAPABILITY = Capability(language="rust", dependency_manager="cargo", application_framework=None)
+
+    DEFAULT_BUILD_DIR = BuildDirectory.SOURCE
+    BUILD_IN_SOURCE_SUPPORT = BuildInSourceSupport.EXCLUSIVELY_SUPPORTED
+
+    SUPPORTED_MANIFESTS = ["Cargo.toml"]
+
+    def __init__(self, source_dir, artifacts_dir, scratch_dir, manifest_path, runtime=None, mode=None, **kwargs):
+        super(RustCargoLambdaWorkflow, self).__init__(
+            source_dir, artifacts_dir, scratch_dir, manifest_path, runtime=runtime, **kwargs
+        )
+        if not is_experimental_cargo_lambda_scope(self.experimental_flags):
+            raise CargoLambdaExecutionException(
+                message="Feature flag `experimentalCargoLambda` must be enabled to use this workflow"
+            )
+
+        # we utilize the handler identifier to
+        # select the binary to build
+        options = kwargs.get("options") or {}
+        handler = options.get("artifact_executable_name")
+        flags = options.get("cargo_lambda_flags")
+        subprocess_cargo_lambda = SubprocessCargoLambda(which=which)
+        self.actions = [
+            RustCargoLambdaBuildAction(
+                source_dir,
+                self.binaries,
+                mode,
+                subprocess_cargo_lambda,
+                self.architecture,
+                handler,
+                flags,
+            ),
+            RustCopyAndRenameAction(source_dir, artifacts_dir, handler),
+        ]
+
+    def get_resolvers(self):
+        """
+        specialized path resolver that just returns the list of executable for the runtime on the path.
+        """
+        return [
+            PathResolver(runtime=self.runtime, binary="cargo"),
+            PathResolver(runtime=self.runtime, binary="cargo-lambda"),
+        ]
diff --git a/tests/integration/workflows/rust_cargo/test_rust_cargo.py b/tests/integration/workflows/rust_cargo/test_rust_cargo.py
new file mode 100644
index 000000000..2fb846718
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/test_rust_cargo.py
@@ -0,0 +1,184 @@
+import os
+import shutil
+import tempfile
+
+from unittest import TestCase
+
+from aws_lambda_builders.builder import LambdaBuilder
+from aws_lambda_builders.exceptions import WorkflowFailedError
+from aws_lambda_builders.workflows.rust_cargo.feature_flag import EXPERIMENTAL_FLAG_CARGO_LAMBDA
+
+
+def rm_target_lambda(base):
+    shutil.rmtree(os.path.join(base, "target", "lambda"), ignore_errors=True)
+
+
+class TestRustCargo(TestCase):
+    """
+    Verifies that rust workflow works by building a Lambda using cargo
+    """
+
+    TEST_DATA_FOLDER = os.path.join(os.path.dirname(__file__), "testdata")
+
+    def setUp(self):
+        self.artifacts_dir = tempfile.mkdtemp()
+        self.scratch_dir = tempfile.mkdtemp()
+        self.runtime = "provided"
+        # this inherently tests that rust was was wired up though
+        # the registry, a runtime error would be raised here if not
+        self.builder = LambdaBuilder(language="rust", dependency_manager="cargo", application_framework=None)
+
+    def tearDown(self):
+        shutil.rmtree(self.artifacts_dir)
+        shutil.rmtree(self.scratch_dir)
+
+    def test_failed_build_project(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "fail")
+
+        with self.assertRaises(WorkflowFailedError) as raised:
+            self.builder.build(
+                source_dir,
+                self.artifacts_dir,
+                self.scratch_dir,
+                os.path.join(source_dir, "Cargo.toml"),
+                runtime=self.runtime,
+                options={"artifact_executable_name": "fail"},
+                experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+            )
+        self.assertTrue(
+            raised.exception.args[0].startswith("RustCargoLambdaBuilder:CargoLambdaBuild - Cargo Lambda failed"),
+            raised.exception.args[0],
+        )
+
+    def test_builds_hello_project(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "hello")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_hello_project_with_artifact_name(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "hello")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            options={"artifact_executable_name": "hello"},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_hello_project_for_arm64(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "hello")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            architecture="arm64",
+            runtime=self.runtime,
+            options={"artifact_executable_name": "hello"},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_workspaces_project_with_bin_name(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "workspaces")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            options={"artifact_executable_name": "foo"},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_workspaces_project_with_package_option(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "workspaces")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            options={"cargo_lambda_flags": ["--package", "foo"]},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_multi_function_project_with_function_a(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "multi-binary")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            options={"artifact_executable_name": "function_a"},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
+
+    def test_builds_multi_function_project_with_function_b(self):
+        source_dir = os.path.join(self.TEST_DATA_FOLDER, "multi-binary")
+        rm_target_lambda(source_dir)
+
+        self.builder.build(
+            source_dir,
+            self.artifacts_dir,
+            self.scratch_dir,
+            os.path.join(source_dir, "Cargo.toml"),
+            runtime=self.runtime,
+            options={"artifact_executable_name": "function_b"},
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+
+        expected_files = {"bootstrap"}
+        output_files = set(os.listdir(self.artifacts_dir))
+
+        self.assertEqual(expected_files, output_files)
diff --git a/tests/integration/workflows/rust_cargo/testdata/fail/.gitignore b/tests/integration/workflows/rust_cargo/testdata/fail/.gitignore
new file mode 100644
index 000000000..1de565933
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/fail/.gitignore
@@ -0,0 +1 @@
+target
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/fail/Cargo.lock b/tests/integration/workflows/rust_cargo/testdata/fail/Cargo.lock
new file mode 100644
index 000000000..f15e92225
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/fail/Cargo.lock
@@ -0,0 +1,727 @@
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index 000000000..97c36973f
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diff --git a/tests/integration/workflows/rust_cargo/testdata/fail/src/main.rs b/tests/integration/workflows/rust_cargo/testdata/fail/src/main.rs
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index 000000000..a649502ef
--- /dev/null
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index 000000000..22725e9be
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diff --git a/tests/integration/workflows/rust_cargo/testdata/hello/Cargo.toml b/tests/integration/workflows/rust_cargo/testdata/hello/Cargo.toml
new file mode 100644
index 000000000..cc282cc65
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/hello/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+lambda_runtime = "0.5.1"
+serde = "1"
+tokio = { version = "1.17", features = ["macros", "rt"] }
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/hello/src/main.rs b/tests/integration/workflows/rust_cargo/testdata/hello/src/main.rs
new file mode 100644
index 000000000..aa2b6f93c
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/hello/src/main.rs
@@ -0,0 +1,44 @@
+// This example requires the following input to succeed:
+// { "command": "do something" }
+
+use lambda_runtime::{service_fn, Error, LambdaEvent};
+use serde::{Deserialize, Serialize};
+
+/// This is also a made-up example. Requests come into the runtime as unicode
+/// strings in json format, which can map to any structure that implements `serde::Deserialize`
+/// The runtime pays no attention to the contents of the request payload.
+#[derive(Deserialize)]
+struct Request {
+    command: String,
+}
+
+/// This is a made-up example of what a response structure may look like.
+/// There is no restriction on what it can be. The runtime requires responses
+/// to be serialized into json. The runtime pays no attention
+/// to the contents of the response payload.
+#[derive(Serialize)]
+struct Response {
+    req_id: String,
+    msg: String,
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    let func = service_fn(my_handler);
+    lambda_runtime::run(func).await?;
+    Ok(())
+}
+
+pub(crate) async fn my_handler(event: LambdaEvent<Request>) -> Result<Response, Error> {
+    // extract some useful info from the request
+    let command = event.payload.command;
+
+    // prepare the response
+    let resp = Response {
+        req_id: event.context.request_id,
+        msg: format!("Command {} executed at {:?}.", command, std::time::SystemTime::now()),
+    };
+
+    // return `Response` (it will be serialized to JSON automatically by the runtime)
+    Ok(resp)
+}
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/multi-binary/.gitignore b/tests/integration/workflows/rust_cargo/testdata/multi-binary/.gitignore
new file mode 100644
index 000000000..1de565933
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/multi-binary/.gitignore
@@ -0,0 +1 @@
+target
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.lock b/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.lock
new file mode 100644
index 000000000..0eabf8275
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.lock
@@ -0,0 +1,581 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "async-stream"
+version = "0.3.3"
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+ "futures-core",
+]
+
+[[package]]
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diff --git a/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.toml b/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.toml
new file mode 100644
index 000000000..14063f523
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/multi-binary/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "test-handler"
+version = "0.1.0"
+edition = "2021"
+
+# Starting in Rust 1.62 you can use `cargo add` to add dependencies 
+# to your project.
+#
+# If you're using an older Rust version,
+# download cargo-edit(https://github.com/killercup/cargo-edit#installation) 
+# to install the `add` subcommand.
+#
+# Running `cargo add DEPENDENCY_NAME` will
+# add the latest version of a dependency to the list,
+# and it will keep the alphabetic ordering for you.
+
+[dependencies]
+
+lambda_runtime = "0.6.0"
+serde = "1.0.136"
+tokio = { version = "1", features = ["macros"] }
+tracing = { version = "0.1", features = ["log"] }
+tracing-subscriber = { version = "0.3", default-features = false, features = ["fmt"] }
+
+[[bin]]
+name = "function_a"
+path = "src/function_a.rs"
+
+[[bin]]
+name = "function_b"
+path = "src/function_b.rs"
diff --git a/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_a.rs b/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_a.rs
new file mode 100644
index 000000000..be1f7c9ea
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_a.rs
@@ -0,0 +1,53 @@
+use lambda_runtime::{run, service_fn, Error, LambdaEvent};
+
+use serde::{Deserialize, Serialize};
+
+/// This is a made-up example. Requests come into the runtime as unicode
+/// strings in json format, which can map to any structure that implements `serde::Deserialize`
+/// The runtime pays no attention to the contents of the request payload.
+#[derive(Deserialize)]
+struct Request {
+    command: String,
+}
+
+/// This is a made-up example of what a response structure may look like.
+/// There is no restriction on what it can be. The runtime requires responses
+/// to be serialized into json. The runtime pays no attention
+/// to the contents of the response payload.
+#[derive(Serialize)]
+struct Response {
+    req_id: String,
+    msg: String,
+}
+
+/// This is the main body for the function.
+/// Write your code inside it.
+/// There are some code example in the following URLs:
+/// - https://github.com/awslabs/aws-lambda-rust-runtime/tree/main/examples
+/// - https://github.com/aws-samples/serverless-rust-demo/
+async fn function_handler(event: LambdaEvent<Request>) -> Result<Response, Error> {
+    // Extract some useful info from the request
+    let command = event.payload.command;
+
+    // Prepare the response
+    let resp = Response {
+        req_id: event.context.request_id,
+        msg: format!("Command {}.", command),
+    };
+
+    // Return `Response` (it will be serialized to JSON automatically by the runtime)
+    Ok(resp)
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    tracing_subscriber::fmt()
+        .with_max_level(tracing::Level::INFO)
+        // disable printing the name of the module in every log line.
+        .with_target(false)
+        // disabling time is handy because CloudWatch will add the ingestion time.
+        .without_time()
+        .init();
+
+    run(service_fn(function_handler)).await
+}
diff --git a/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_b.rs b/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_b.rs
new file mode 100644
index 000000000..be1f7c9ea
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/multi-binary/src/function_b.rs
@@ -0,0 +1,53 @@
+use lambda_runtime::{run, service_fn, Error, LambdaEvent};
+
+use serde::{Deserialize, Serialize};
+
+/// This is a made-up example. Requests come into the runtime as unicode
+/// strings in json format, which can map to any structure that implements `serde::Deserialize`
+/// The runtime pays no attention to the contents of the request payload.
+#[derive(Deserialize)]
+struct Request {
+    command: String,
+}
+
+/// This is a made-up example of what a response structure may look like.
+/// There is no restriction on what it can be. The runtime requires responses
+/// to be serialized into json. The runtime pays no attention
+/// to the contents of the response payload.
+#[derive(Serialize)]
+struct Response {
+    req_id: String,
+    msg: String,
+}
+
+/// This is the main body for the function.
+/// Write your code inside it.
+/// There are some code example in the following URLs:
+/// - https://github.com/awslabs/aws-lambda-rust-runtime/tree/main/examples
+/// - https://github.com/aws-samples/serverless-rust-demo/
+async fn function_handler(event: LambdaEvent<Request>) -> Result<Response, Error> {
+    // Extract some useful info from the request
+    let command = event.payload.command;
+
+    // Prepare the response
+    let resp = Response {
+        req_id: event.context.request_id,
+        msg: format!("Command {}.", command),
+    };
+
+    // Return `Response` (it will be serialized to JSON automatically by the runtime)
+    Ok(resp)
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    tracing_subscriber::fmt()
+        .with_max_level(tracing::Level::INFO)
+        // disable printing the name of the module in every log line.
+        .with_target(false)
+        // disabling time is handy because CloudWatch will add the ingestion time.
+        .without_time()
+        .init();
+
+    run(service_fn(function_handler)).await
+}
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/.gitignore b/tests/integration/workflows/rust_cargo/testdata/workspaces/.gitignore
new file mode 100644
index 000000000..1de565933
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/.gitignore
@@ -0,0 +1 @@
+target
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.lock b/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.lock
new file mode 100644
index 000000000..103c00784
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.lock
@@ -0,0 +1,736 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "pin-project-lite",
+ "socket2",
+ "tokio-macros",
+ "winapi",
+]
+
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+ "hdrhistogram",
+ "indexmap",
+ "pin-project",
+ "pin-project-lite",
+ "rand",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
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+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
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+
+[[package]]
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diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.toml b/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.toml
new file mode 100644
index 000000000..7492eaa8e
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/Cargo.toml
@@ -0,0 +1,2 @@
+[workspace]
+members = ["foo", "bar"]
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/Cargo.toml b/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/Cargo.toml
new file mode 100644
index 000000000..14b0e9377
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "bar"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+lambda_runtime = "0.5.1"
+serde = "1"
+tokio = { version = "1.17", features = ["macros", "rt"] }
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/src/main.rs b/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/src/main.rs
new file mode 100644
index 000000000..aa2b6f93c
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/bar/src/main.rs
@@ -0,0 +1,44 @@
+// This example requires the following input to succeed:
+// { "command": "do something" }
+
+use lambda_runtime::{service_fn, Error, LambdaEvent};
+use serde::{Deserialize, Serialize};
+
+/// This is also a made-up example. Requests come into the runtime as unicode
+/// strings in json format, which can map to any structure that implements `serde::Deserialize`
+/// The runtime pays no attention to the contents of the request payload.
+#[derive(Deserialize)]
+struct Request {
+    command: String,
+}
+
+/// This is a made-up example of what a response structure may look like.
+/// There is no restriction on what it can be. The runtime requires responses
+/// to be serialized into json. The runtime pays no attention
+/// to the contents of the response payload.
+#[derive(Serialize)]
+struct Response {
+    req_id: String,
+    msg: String,
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    let func = service_fn(my_handler);
+    lambda_runtime::run(func).await?;
+    Ok(())
+}
+
+pub(crate) async fn my_handler(event: LambdaEvent<Request>) -> Result<Response, Error> {
+    // extract some useful info from the request
+    let command = event.payload.command;
+
+    // prepare the response
+    let resp = Response {
+        req_id: event.context.request_id,
+        msg: format!("Command {} executed at {:?}.", command, std::time::SystemTime::now()),
+    };
+
+    // return `Response` (it will be serialized to JSON automatically by the runtime)
+    Ok(resp)
+}
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/Cargo.toml b/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/Cargo.toml
new file mode 100644
index 000000000..67b0af758
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+lambda_runtime = "0.5.1"
+serde = "1"
+tokio = { version = "1.17", features = ["macros", "rt"] }
\ No newline at end of file
diff --git a/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/src/main.rs b/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/src/main.rs
new file mode 100644
index 000000000..aa2b6f93c
--- /dev/null
+++ b/tests/integration/workflows/rust_cargo/testdata/workspaces/foo/src/main.rs
@@ -0,0 +1,44 @@
+// This example requires the following input to succeed:
+// { "command": "do something" }
+
+use lambda_runtime::{service_fn, Error, LambdaEvent};
+use serde::{Deserialize, Serialize};
+
+/// This is also a made-up example. Requests come into the runtime as unicode
+/// strings in json format, which can map to any structure that implements `serde::Deserialize`
+/// The runtime pays no attention to the contents of the request payload.
+#[derive(Deserialize)]
+struct Request {
+    command: String,
+}
+
+/// This is a made-up example of what a response structure may look like.
+/// There is no restriction on what it can be. The runtime requires responses
+/// to be serialized into json. The runtime pays no attention
+/// to the contents of the response payload.
+#[derive(Serialize)]
+struct Response {
+    req_id: String,
+    msg: String,
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    let func = service_fn(my_handler);
+    lambda_runtime::run(func).await?;
+    Ok(())
+}
+
+pub(crate) async fn my_handler(event: LambdaEvent<Request>) -> Result<Response, Error> {
+    // extract some useful info from the request
+    let command = event.payload.command;
+
+    // prepare the response
+    let resp = Response {
+        req_id: event.context.request_id,
+        msg: format!("Command {} executed at {:?}.", command, std::time::SystemTime::now()),
+    };
+
+    // return `Response` (it will be serialized to JSON automatically by the runtime)
+    Ok(resp)
+}
\ No newline at end of file
diff --git a/tests/unit/workflows/rust_cargo/__init__.py b/tests/unit/workflows/rust_cargo/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/unit/workflows/rust_cargo/test_actions.py b/tests/unit/workflows/rust_cargo/test_actions.py
new file mode 100644
index 000000000..370fa0011
--- /dev/null
+++ b/tests/unit/workflows/rust_cargo/test_actions.py
@@ -0,0 +1,165 @@
+from unittest import TestCase
+from mock import patch
+import io
+import logging
+import os
+
+from aws_lambda_builders.actions import ActionFailedError
+from aws_lambda_builders.binary_path import BinaryPath
+from aws_lambda_builders.workflow import BuildMode
+from aws_lambda_builders.workflows.rust_cargo.actions import (
+    RustCargoLambdaBuildAction,
+    RustCopyAndRenameAction,
+)
+from aws_lambda_builders.workflows.rust_cargo.cargo_lambda import SubprocessCargoLambda
+
+LOG = logging.getLogger("aws_lambda_builders.workflows.rust_cargo.cargo_lambda")
+
+
+class FakePopen:
+    def __init__(self, out=b"out", err=b"err", retcode=0):
+        self.out = out
+        self.err = err
+        self.stderr = io.BytesIO(err)
+        self.stdout = [out]
+        self.returncode = retcode
+
+    def communicate(self):
+        return self.out, self.err
+
+    def wait(self):
+        return self.returncode
+
+
+class TestBuildAction(TestCase):
+    @patch("aws_lambda_builders.workflows.rust_cargo.actions.OSUtils")
+    def setUp(self, OSUtilMock):
+        self.osutils = OSUtilMock.return_value
+        self.osutils.popen.side_effect = [FakePopen()]
+
+        def which(cmd, executable_search_paths):
+            return ["/bin/cargo-lambda"]
+
+        proc = SubprocessCargoLambda(which=which, osutils=self.osutils)
+        self.subprocess_cargo_lambda = proc
+
+    def test_release_build_cargo_command_without_release_mode(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction("source_dir", {"cargo": cargo}, None, self.subprocess_cargo_lambda)
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--release"],
+        )
+
+    def test_release_build_cargo_command(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.RELEASE, self.subprocess_cargo_lambda
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--release"],
+        )
+
+    def test_release_build_cargo_command_with_target(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.RELEASE, self.subprocess_cargo_lambda, "arm64"
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--release", "--arm64"],
+        )
+
+    def test_debug_build_cargo_command(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.DEBUG, self.subprocess_cargo_lambda
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build"],
+        )
+
+    def test_debug_build_cargo_command_with_architecture(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.DEBUG, self.subprocess_cargo_lambda, "arm64"
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--arm64"],
+        )
+
+    def test_debug_build_cargo_command_with_flags(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        flags = ["--package", "package-in-workspace"]
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.DEBUG, self.subprocess_cargo_lambda, "arm64", flags=flags
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--arm64", "--package", "package-in-workspace"],
+        )
+
+    def test_debug_build_cargo_command_with_handler(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.DEBUG, self.subprocess_cargo_lambda, "arm64", handler="foo"
+        )
+        self.assertEqual(
+            action.build_command(),
+            ["path/to/cargo", "lambda", "build", "--arm64", "--bin", "foo"],
+        )
+
+    def test_execute_happy_path(self):
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.RELEASE, self.subprocess_cargo_lambda
+        )
+        action.execute()
+
+    def test_execute_cargo_build_fail(self):
+        popen = FakePopen(retcode=1, err=b"build failed")
+        self.subprocess_cargo_lambda._osutils.popen.side_effect = [popen]
+
+        cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+        action = RustCargoLambdaBuildAction(
+            "source_dir", {"cargo": cargo}, BuildMode.RELEASE, self.subprocess_cargo_lambda
+        )
+        with self.assertRaises(ActionFailedError) as err_assert:
+            action.execute()
+        self.assertEqual(err_assert.exception.args[0], "Cargo Lambda failed: build failed")
+
+    def test_execute_happy_with_logger(self):
+        LOG.setLevel(logging.DEBUG)
+        with patch.object(LOG, "debug") as mock_warning:
+            cargo = BinaryPath(None, None, None, binary_path="path/to/cargo")
+            action = RustCargoLambdaBuildAction(
+                "source_dir", {"cargo": cargo}, BuildMode.RELEASE, self.subprocess_cargo_lambda
+            )
+            out = action.execute()
+            self.assertEqual(out, "out")
+        mock_warning.assert_called_with("RUST_LOG environment variable set to `%s`", "debug")
+
+
+class TestCopyAndRenameAction(TestCase):
+    def test_debug_copy_path(self):
+        action = RustCopyAndRenameAction("source_dir", "output_dir", "foo")
+        self.assertEqual(action.binary_path(), os.path.join("source_dir", "target", "lambda", "foo", "bootstrap"))
+
+    def test_release_copy_path(self):
+        action = RustCopyAndRenameAction("source_dir", "output_dir", "foo")
+        self.assertEqual(action.binary_path(), os.path.join("source_dir", "target", "lambda", "foo", "bootstrap"))
+
+    def test_nonlinux_copy_path(self):
+        action = RustCopyAndRenameAction("source_dir", "output_dir", "foo")
+        self.assertEqual(action.binary_path(), os.path.join("source_dir", "target", "lambda", "foo", "bootstrap"))
+
+    @patch("aws_lambda_builders.workflows.rust_cargo.actions.OSUtils")
+    def test_execute(self, OSUtilsMock):
+        osutils = OSUtilsMock.return_value
+        osutils.copyfile.return_value = ""
+        osutils.makedirs.return_value = ""
+        action = RustCopyAndRenameAction("source_dir", "foo", "output_dir", osutils=osutils)
+        action.execute()
diff --git a/tests/unit/workflows/rust_cargo/test_cargo_lambda.py b/tests/unit/workflows/rust_cargo/test_cargo_lambda.py
new file mode 100644
index 000000000..7fc86ecb7
--- /dev/null
+++ b/tests/unit/workflows/rust_cargo/test_cargo_lambda.py
@@ -0,0 +1,21 @@
+from unittest import TestCase
+
+from aws_lambda_builders.workflows.rust_cargo.actions import CargoLambdaExecutionException
+from aws_lambda_builders.workflows.rust_cargo.cargo_lambda import SubprocessCargoLambda
+
+
+class TestSubprocessCargoLambda(TestCase):
+    def test_raises_RustCargoLambdaBuilderError_if_which_returns_no_results(self):
+        def which(cmd, executable_search_paths):
+            return []
+
+        proc = SubprocessCargoLambda(which=which)
+
+        with self.assertRaises(CargoLambdaExecutionException) as raised:
+            proc.run("cargo lambda build", "/source_dir")
+
+        self.assertEqual(
+            raised.exception.args[0],
+            "Cargo Lambda failed: Cannot find Cargo Lambda. Cargo Lambda must be installed on the host machine to use this feature. "
+            "Follow the gettings started guide to learn how to install it: https://www.cargo-lambda.info/guide/getting-started.html",
+        )
diff --git a/tests/unit/workflows/rust_cargo/test_utils.py b/tests/unit/workflows/rust_cargo/test_utils.py
new file mode 100644
index 000000000..6d1964fd7
--- /dev/null
+++ b/tests/unit/workflows/rust_cargo/test_utils.py
@@ -0,0 +1,25 @@
+import os
+import sys
+import subprocess
+
+from unittest import TestCase
+
+from aws_lambda_builders.workflows.rust_cargo.utils import OSUtils
+
+
+class TestOSUtils(TestCase):
+    def test_popen_runs_a_process_and_returns_outcome(self):
+        cwd_py = os.path.join(os.path.dirname(__file__), "..", "..", "..", "functional", "testdata", "cwd.py")
+        p = OSUtils().popen([sys.executable, cwd_py], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        out, err = p.communicate()
+        self.assertEqual(p.returncode, 0)
+        self.assertEqual(out.decode("utf8").strip(), os.getcwd())
+
+    def test_popen_can_accept_cwd(self):
+        testdata_dir = os.path.join(os.path.dirname(__file__), "..", "..", "..", "functional", "testdata")
+        p = OSUtils().popen(
+            [sys.executable, "cwd.py"], stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd=testdata_dir
+        )
+        out, err = p.communicate()
+        self.assertEqual(p.returncode, 0)
+        self.assertEqual(out.decode("utf8").strip(), os.path.abspath(testdata_dir))
diff --git a/tests/unit/workflows/rust_cargo/test_workflow.py b/tests/unit/workflows/rust_cargo/test_workflow.py
new file mode 100644
index 000000000..ff34e03e4
--- /dev/null
+++ b/tests/unit/workflows/rust_cargo/test_workflow.py
@@ -0,0 +1,48 @@
+from unittest import TestCase
+
+from aws_lambda_builders.path_resolver import PathResolver
+from aws_lambda_builders.workflows.rust_cargo.workflow import RustCargoLambdaWorkflow
+from aws_lambda_builders.workflows.rust_cargo.actions import (
+    RustCargoLambdaBuildAction,
+    RustCopyAndRenameAction,
+)
+from aws_lambda_builders.workflows.rust_cargo.feature_flag import EXPERIMENTAL_FLAG_CARGO_LAMBDA
+
+
+class TestRustCargoLambdaWorkflow(TestCase):
+    """
+    Validate workflow wiring
+    """
+
+    def test_workflow_sets_up_builder_actions(self):
+        workflow = RustCargoLambdaWorkflow(
+            "source",
+            "artifacts",
+            "scratch_dir",
+            "manifest",
+            runtime="provided",
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+        self.assertEqual(len(workflow.actions), 2)
+        self.assertIsInstance(workflow.actions[0], RustCargoLambdaBuildAction)
+        self.assertIsInstance(workflow.actions[1], RustCopyAndRenameAction)
+
+    def test_workflow_configures_path_resolver_for_cargo(self):
+        workflow = RustCargoLambdaWorkflow(
+            "source",
+            "artifacts",
+            "scratch_dir",
+            "manifest",
+            runtime="provided",
+            experimental_flags=[EXPERIMENTAL_FLAG_CARGO_LAMBDA],
+        )
+        resolvers = workflow.get_resolvers()
+        self.assertEqual(len(resolvers), 2)
+        resolver = resolvers[0]
+        self.assertIsInstance(resolver, PathResolver)
+        self.assertEqual(resolver.binary, "cargo")
+        self.assertEqual(resolver.runtime, "provided")
+        resolver = resolvers[1]
+        self.assertIsInstance(resolver, PathResolver)
+        self.assertEqual(resolver.binary, "cargo-lambda")
+        self.assertEqual(resolver.runtime, "provided")