There are two ways for it to pass:

• An alarm exists without dimensions that filter for whatever FunctionName the lambda has(this alarm would catch Errors across all Lambda functions)
• A CloudWatch alarm specific to that Lambda Function. That is, in the dimensions object, FunctionName is equal to the name of the Lambda's function. This would mean you'd see as many alarms as lambda's (in most cases).
• The raw data has all lambda functions listed an all CloudWatch alarms with the namespace AWS/Lambda and the metricName Errors . So, it’s all cloudwatch alarms relevant to this test