diff --git a/serverless/panther-preflight-tools/readiness-check/src/app.py b/serverless/panther-preflight-tools/readiness-check/src/app.py
index d762373..d5ce150 100644
--- a/serverless/panther-preflight-tools/readiness-check/src/app.py
+++ b/serverless/panther-preflight-tools/readiness-check/src/app.py
@@ -165,14 +165,14 @@ def check_s3_select_readiness() -> bool:
     return s3check.is_enabled()
 
 
-def lambda_handler(_: dict[str, Any], __: Any) -> str:
+def lambda_handler(_: dict[str, Any], __: Any) -> dict:
     """
     Lambda entrypoint.  Accepts no input values. The "where" of it's running is
     the most important aspect.
     """
 
     return {
-        'deployment_role_readiness_results': check_deployment_role_readiness(_, __),
+        'deployment_role_readiness_results': check_deployment_role_readiness(),
         's3_select_enabled': check_s3_select_readiness()
     }
 
diff --git a/serverless/panther-preflight-tools/readiness-check/src/s3_select_check.py b/serverless/panther-preflight-tools/readiness-check/src/s3_select_check.py
index 4a67948..6d3a877 100644
--- a/serverless/panther-preflight-tools/readiness-check/src/s3_select_check.py
+++ b/serverless/panther-preflight-tools/readiness-check/src/s3_select_check.py
@@ -77,8 +77,7 @@ def is_enabled(self) -> bool:
 
     def _setup_bucket(self):
         self.log.info(f'setting up test s3 bucket ({self.test_bucket_name})')
-        self.s3.create_bucket(Bucket=self.test_bucket_name, CreateBucketConfiguration={
-                              'LocationConstraint': self.test_bucket_region})
+        self.s3.create_bucket(Bucket=self.test_bucket_name)
 
     def _cleanup_bucket(self):
         self.log.info(f'cleaning up test s3 bucket ({self.test_bucket_name})')