diff --git a/scripts/source_development_defaults.sh b/scripts/source_development_defaults.sh
--- a/scripts/source_development_defaults.sh
+++ b/scripts/source_development_defaults.sh
@@ -53,3 +53,14 @@
 
 # For development and local testing, point to localstack
 export LOCALSTACK_ENDPOINT=http://localhost:4566
+export AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID:-test}
+export AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY:-test}
+
+# Create easier-to-use shortcut for localstack
+awslocal() {
+  aws --endpoint-url=http://localhost:4566 "$@"
+}
+# Enable shell completions
+if [[ $(basename "$0") == "bash" ]]; then
+  complete -C aws_completer awslocal
+fi