diff --git a/builtin/providers/aws/resource_aws_lambda_event_source_mapping_test.go b/builtin/providers/aws/resource_aws_lambda_event_source_mapping_test.go
index 7bbaa0571a..ab4f363948 100644
--- a/builtin/providers/aws/resource_aws_lambda_event_source_mapping_test.go
+++ b/builtin/providers/aws/resource_aws_lambda_event_source_mapping_test.go
@@ -239,6 +239,7 @@ resource "aws_lambda_function" "lambda_function_test_update" {
     function_name = "example_lambda_name_update"
     role = "${aws_iam_role.iam_for_lambda.arn}"
     handler = "exports.example"
+    runtime = "nodejs4.3"
 }
 
 resource "aws_lambda_event_source_mapping" "lambda_event_source_mapping_test" {
@@ -324,6 +325,7 @@ resource "aws_lambda_function" "lambda_function_test_update" {
     function_name = "example_lambda_name_update"
     role = "${aws_iam_role.iam_for_lambda.arn}"
     handler = "exports.example"
+    runtime = "nodejs4.3"
 }
 
 resource "aws_lambda_event_source_mapping" "lambda_event_source_mapping_test" {