diff --git a/metadata-ingestion/src/datahub/ingestion/source/aws/aws_common.py b/metadata-ingestion/src/datahub/ingestion/source/aws/aws_common.py
index 421991a096..95ca10045f 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/aws/aws_common.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/aws/aws_common.py
@@ -34,7 +34,7 @@ class AwsAssumeRoleConfig(PermissiveConfigModel):
 
 def assume_role(
     role: AwsAssumeRoleConfig,
-    aws_region: str,
+    aws_region: Optional[str],
     credentials: Optional[dict] = None,
 ) -> dict:
     credentials = credentials or {}
@@ -93,7 +93,7 @@ class AwsConnectionConfig(ConfigModel):
         default=None,
         description="Named AWS profile to use. Only used if access key / secret are unset. If not set the default will be used",
     )
-    aws_region: str = Field(description="AWS region code.")
+    aws_region: Optional[str] = Field(None, description="AWS region code.")
 
     aws_endpoint_url: Optional[str] = Field(
         default=None,
diff --git a/metadata-ingestion/src/datahub/ingestion/source/aws/sagemaker.py b/metadata-ingestion/src/datahub/ingestion/source/aws/sagemaker.py
index 6f6e8bbc05..e335174eeb 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/aws/sagemaker.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/aws/sagemaker.py
@@ -82,7 +82,7 @@ class SagemakerSource(Source):
                 env=self.env,
                 report=self.report,
                 job_type_filter=self.source_config.extract_jobs,
-                aws_region=self.source_config.aws_region,
+                aws_region=self.sagemaker_client.meta.region_name,
             )
             yield from job_processor.get_workunits()
 
@@ -98,7 +98,7 @@ class SagemakerSource(Source):
                 model_image_to_jobs=model_image_to_jobs,
                 model_name_to_jobs=model_name_to_jobs,
                 lineage=lineage,
-                aws_region=self.source_config.aws_region,
+                aws_region=self.sagemaker_client.meta.region_name,
             )
             yield from model_processor.get_workunits()
 
diff --git a/metadata-ingestion/src/datahub/ingestion/source/dbt/dbt_core.py b/metadata-ingestion/src/datahub/ingestion/source/dbt/dbt_core.py
index 6fd3c5ba30..a2f96264b7 100644
--- a/metadata-ingestion/src/datahub/ingestion/source/dbt/dbt_core.py
+++ b/metadata-ingestion/src/datahub/ingestion/source/dbt/dbt_core.py
@@ -81,7 +81,7 @@ class DBTCoreConfig(DBTCommonConfig):
             if (values.get(f) or "").startswith("s3://")
         ]
 
-        if uri_containing_fields and not aws_connection:
+        if uri_containing_fields and aws_connection is None:
             raise ValueError(
                 f"Please provide aws_connection configuration, since s3 uris have been provided in fields {uri_containing_fields}"
             )
diff --git a/metadata-ingestion/tests/unit/test_dbt_source.py b/metadata-ingestion/tests/unit/test_dbt_source.py
index 0fbe9ecbcc..737cf6aca3 100644
--- a/metadata-ingestion/tests/unit/test_dbt_source.py
+++ b/metadata-ingestion/tests/unit/test_dbt_source.py
@@ -1,6 +1,7 @@
 from typing import Dict, List, Union
 from unittest import mock
 
+import pytest
 from pydantic import ValidationError
 
 from datahub.emitter import mce_builder
@@ -180,14 +181,12 @@ def test_dbt_entity_emission_configuration():
         "target_platform": "dummy_platform",
         "entities_enabled": {"models": "Only", "seeds": "Only"},
     }
-    try:
+    with pytest.raises(
+        ValidationError,
+        match="Cannot have more than 1 type of entity emission set to ONLY",
+    ):
         DBTCoreConfig.parse_obj(config_dict)
-    except ValidationError as ve:
-        assert len(ve.errors()) == 1
-        assert (
-            "Cannot have more than 1 type of entity emission set to ONLY"
-            in ve.errors()[0]["msg"]
-        )
+
     # valid config
     config_dict = {
         "manifest_path": "dummy_path",
@@ -198,6 +197,26 @@ def test_dbt_entity_emission_configuration():
     DBTCoreConfig.parse_obj(config_dict)
 
 
+def test_dbt_s3_config():
+    # test missing aws config
+    config_dict: dict = {
+        "manifest_path": "s3://dummy_path",
+        "catalog_path": "s3://dummy_path",
+        "target_platform": "dummy_platform",
+    }
+    with pytest.raises(ValidationError, match="provide aws_connection"):
+        DBTCoreConfig.parse_obj(config_dict)
+
+    # valid config
+    config_dict = {
+        "manifest_path": "s3://dummy_path",
+        "catalog_path": "s3://dummy_path",
+        "target_platform": "dummy_platform",
+        "aws_connection": {},
+    }
+    DBTCoreConfig.parse_obj(config_dict)
+
+
 def test_default_convert_column_urns_to_lowercase():
     config_dict = {
         "manifest_path": "dummy_path",