diff --git a/apis/v1alpha1/ack-generate-metadata.yaml b/apis/v1alpha1/ack-generate-metadata.yaml
index ea732a1..723d903 100755
--- a/apis/v1alpha1/ack-generate-metadata.yaml
+++ b/apis/v1alpha1/ack-generate-metadata.yaml
@@ -1,9 +1,9 @@
 ack_generate_info:
-  build_date: "2024-04-08T23:27:24Z"
+  build_date: "2024-04-09T20:12:55Z"
   build_hash: 37f4ba2b5a121a8786bc516e9ec4aa0b8b590c7d
   go_version: go1.21.6
   version: v0.33.0-1-g37f4ba2
-api_directory_checksum: 33a9d13c7343aec5c9acdc6e18fd2494f2af2e88
+api_directory_checksum: 93229b2f11a89ef43fc0ef07ea1beb425e9aaf17
 api_version: v1alpha1
 aws_sdk_go_version: v1.44.181
 generator_config_info:
diff --git a/test/e2e/tests/test_function.py b/test/e2e/tests/test_function.py
index 077cd77..d76f823 100644
--- a/test/e2e/tests/test_function.py
+++ b/test/e2e/tests/test_function.py
@@ -681,5 +681,87 @@ def test_function_event_invoke_config(self, lambda_client):
 
         time.sleep(DELETE_WAIT_AFTER_SECONDS)
 
+        # Check Lambda function doesn't exist
+        assert not lambda_validator.function_exists(resource_name)
+    
+    def test_function_code_s3(self, lambda_client):
+        resource_name = random_suffix_name("functioncodes3", 24)
+
+        resources = get_bootstrap_resources()
+        logging.debug(resources)
+
+        archive_1 = open(LAMBDA_FUNCTION_FILE_PATH_ZIP, 'rb') 
+        readFile_1 = archive_1.read() 
+        hash_1 = hashlib.sha256(readFile_1) 
+        binary_hash_1 = hash_1.digest() 
+        base64_hash_1 = base64.b64encode(binary_hash_1).decode('utf-8')
+
+        archive_2 = open(LAMBDA_FUNCTION_UPDATED_FILE_PATH_ZIP, 'rb') 
+        readFile_2 = archive_2.read() 
+        hash_2 = hashlib.sha256(readFile_2) 
+        binary_hash_2 = hash_2.digest() 
+        base64_hash_2 = base64.b64encode(binary_hash_2).decode('utf-8')
+
+        replacements = REPLACEMENT_VALUES.copy()
+        replacements["FUNCTION_NAME"] = resource_name
+        replacements["BUCKET_NAME"] = resources.FunctionsBucket.name
+        replacements["LAMBDA_ROLE"] = resources.BasicRole.arn
+        replacements["LAMBDA_FILE_NAME"] = LAMBDA_FUNCTION_FILE_ZIP
+        replacements["RESERVED_CONCURRENT_EXECUTIONS"] = "0"
+        replacements["CODE_SIGNING_CONFIG_ARN"] = ""
+        replacements["AWS_REGION"] = get_region()
+        replacements["HASH"] = base64_hash_1
+
+        # Load Lambda CR
+        resource_data = load_lambda_resource(
+            "function_code_s3",
+            additional_replacements=replacements,
+        )
+        logging.debug(resource_data)
+
+        # Create k8s resource
+        ref = k8s.CustomResourceReference(
+            CRD_GROUP, CRD_VERSION, RESOURCE_PLURAL,
+            resource_name, namespace="default",
+        )
+        k8s.create_custom_resource(ref, resource_data)
+        cr = k8s.wait_resource_consumed_by_controller(ref)
+
+        assert cr is not None
+        assert k8s.get_resource_exists(ref)
+
+        time.sleep(CREATE_WAIT_AFTER_SECONDS)
+
+        cr = k8s.wait_resource_consumed_by_controller(ref)
+
+        lambda_validator = LambdaValidator(lambda_client)
+
+        # Assert that the original code.s3Bucket and code.s3Key is still part of
+        # the function's CR
+        assert cr["spec"]["code"]["s3Bucket"] == resources.FunctionsBucket.name
+        assert cr["spec"]["code"]["s3Key"] == LAMBDA_FUNCTION_FILE_ZIP
+
+        # Check Lambda function exists
+        assert lambda_validator.function_exists(resource_name)
+
+        # Update cr
+        cr["spec"]["code"]["sha256"] = base64_hash_2
+        cr["spec"]["code"]["s3Key"] = LAMBDA_FUNCTION_UPDATED_FILE_ZIP
+
+        # Patch k8s resource
+        k8s.patch_custom_resource(ref, cr)
+        time.sleep(UPDATE_WAIT_AFTER_SECONDS)
+
+        # Check function updated fields
+        function = lambda_validator.get_function(resource_name)
+        assert function is not None
+        assert function["Configuration"]["CodeSha256"] == base64_hash_2
+
+        # Delete k8s resource
+        _, deleted = k8s.delete_custom_resource(ref)
+        assert deleted is True
+
+        time.sleep(DELETE_WAIT_AFTER_SECONDS)
+
         # Check Lambda function doesn't exist
         assert not lambda_validator.function_exists(resource_name)
\ No newline at end of file