diff --git a/builtin/providers/aws/resource_aws_flow_log_test.go b/builtin/providers/aws/resource_aws_flow_log_test.go
index 9f9ca0570..530559389 100644
--- a/builtin/providers/aws/resource_aws_flow_log_test.go
+++ b/builtin/providers/aws/resource_aws_flow_log_test.go
@@ -34,6 +34,9 @@ func TestAccAWSFlowLog_basic(t *testing.T) {
 func TestAccAWSFlowLog_subnet(t *testing.T) {
 	var flowLog ec2.FlowLog
 	lgn := os.Getenv("LOG_GROUP_NAME")
+        if lgn == "" {
+                t.Fatalf("LOG_GROUP_NAME env var needed for TestAccAWSFlowLog_subnet")
+        }
 
 	resource.Test(t, resource.TestCase{
 		PreCheck:     func() { testAccPreCheck(t) },