diff --git a/src/acktest/aws/identity.py b/src/acktest/aws/identity.py
index f1f28e3e..b5b9cd2d 100644
--- a/src/acktest/aws/identity.py
+++ b/src/acktest/aws/identity.py
@@ -22,3 +22,6 @@ def get_account_id() -> int:
 
 def get_region(default: str = "us-west-2") -> str:
     return boto3.session.Session().region_name or default
+
+def get_partition() -> str:
+    return boto3.client('sts').get_caller_identity().get('Arn').split(':')[1]
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