diff --git a/lib/outputs/fixtures/metadata.json b/lib/outputs/fixtures/metadata.json
index 167ffed2..a58137d8 100644
--- a/lib/outputs/fixtures/metadata.json
+++ b/lib/outputs/fixtures/metadata.json
@@ -5,7 +5,7 @@
   ],
   "CheckID": "iam_disable_30_days_credentials",
   "CheckTitle": "Ensure credentials unused for 30 days or greater are disabled",
-  "CheckType": "Software and Configuration Checks",
+  "CheckType": ["Software and Configuration Checks"],
   "Compliance": [
     {
       "Control": [
diff --git a/lib/outputs/models.py b/lib/outputs/models.py
index ae85fa0b..82b384ef 100644
--- a/lib/outputs/models.py
+++ b/lib/outputs/models.py
@@ -27,7 +27,7 @@ class Check_Output_JSON(BaseModel):
     CheckID: str
     # CheckName: str
     CheckTitle: str
-    CheckType: str
+    CheckType: List[str]
     ServiceName: str
     SubServiceName: str
     Status: str = ""
diff --git a/lib/outputs/outputs.py b/lib/outputs/outputs.py
index b0335508..98ef666d 100644
--- a/lib/outputs/outputs.py
+++ b/lib/outputs/outputs.py
@@ -271,13 +271,11 @@ def send_to_s3_bucket(
         elif output_mode == "json-asff":
             filename = f"{output_filename}{json_asff_file_suffix}"
         logger.info(f"Sending outputs to S3 bucket {output_bucket}")
-        # Check if security hub is enabled in current region
+        file_name = output_directory + "/" + filename
+        bucket_name = output_bucket
+        object_name = output_directory + "/" + output_mode + "/" + filename
         s3_client = audit_session.client("s3")
-        s3_client.upload_file(
-            output_directory + "/" + filename,
-            output_bucket,
-            output_directory + "/" + output_mode + "/" + filename,
-        )
+        s3_client.upload_file(file_name, bucket_name, object_name)
 
     except Exception as error:
         logger.critical(f"{error.__class__.__name__} -- {error}")
diff --git a/lib/outputs/outputs_test.py b/lib/outputs/outputs_test.py
index 1010c34f..1422020d 100644
--- a/lib/outputs/outputs_test.py
+++ b/lib/outputs/outputs_test.py
@@ -1,7 +1,9 @@
 import os
 from os import path, remove
 
+import boto3
 from colorama import Fore
+from moto import mock_s3
 
 from config.config import (
     csv_file_suffix,
@@ -26,6 +28,7 @@ from lib.outputs.outputs import (
     fill_json,
     fill_json_asff,
     generate_csv_fields,
+    send_to_s3_bucket,
     set_report_color,
 )
 from lib.utils.utils import hash_sha512, open_file
@@ -236,7 +239,7 @@ class Test_Outputs:
         )
         expected.GeneratorId = "prowler-" + finding.check_metadata.CheckID
         expected.AwsAccountId = "123456789012"
-        expected.Types = [finding.check_metadata.CheckType]
+        expected.Types = finding.check_metadata.CheckType
         expected.FirstObservedAt = (
             expected.UpdatedAt
         ) = expected.CreatedAt = timestamp_utc.strftime("%Y-%m-%dT%H:%M:%SZ")
@@ -254,10 +257,68 @@ class Test_Outputs:
 
         expected.Compliance = Compliance(
             Status="PASS" + "ED",
-            RelatedRequirements=[finding.check_metadata.CheckType],
+            RelatedRequirements=finding.check_metadata.CheckType,
         )
         expected.Remediation = {
             "Recommendation": finding.check_metadata.Remediation.Recommendation
         }
 
         assert fill_json_asff(input, input_audit_info, finding) == expected
+
+    @mock_s3
+    def test_send_to_s3_bucket(self):
+        # Create mock session
+        session = boto3.session.Session(
+            region_name="us-east-1",
+        )
+        # Create mock audit_info
+        input_audit_info = AWS_Audit_Info(
+            original_session=None,
+            audit_session=session,
+            audited_account="123456789012",
+            audited_identity_arn="test-arn",
+            audited_user_id="test",
+            audited_partition="aws",
+            profile="default",
+            profile_region="eu-west-1",
+            credentials=None,
+            assumed_role_info=None,
+            audited_regions=["eu-west-2", "eu-west-1"],
+            organizations_metadata=None,
+        )
+        # Creat mock bucket
+        bucket_name = "test_bucket"
+        client = boto3.client("s3")
+        client.create_bucket(Bucket=bucket_name)
+        # Create mock csv output file
+        output_directory = "."
+        output_mode = "csv"
+        filename = (
+            f"prowler-output-{input_audit_info.audited_account}-{output_file_timestamp}"
+        )
+        file_descriptor = open_file(
+            f"{output_directory}/{filename}{csv_file_suffix}",
+            "a",
+        )
+        # Send mock csv file to mock S3 Bucket
+        send_to_s3_bucket(
+            filename,
+            output_directory,
+            output_mode,
+            bucket_name,
+            input_audit_info.audit_session,
+        )
+        # Check if the file has been sent by checking its content type
+        assert (
+            client.get_object(
+                Bucket=bucket_name,
+                Key=output_directory
+                + "/"
+                + output_mode
+                + "/"
+                + filename
+                + csv_file_suffix,
+            )["ContentType"]
+            == "binary/octet-stream"
+        )
+        remove(f"{output_directory}/{filename}{csv_file_suffix}")