Before: runtime ale_linters/cloudformation/checkov.vim call ale#test#SetFilename('sample.template.yaml') After: call ale#linter#Reset() Execute(Handle output for no findings correctly): AssertEqual \ [], \ ale_linters#cloudformation#checkov#Handle(bufnr(''), [ \'{', \' "passed": 0,', \' "failed": 0,', \' "skipped": 0,', \' "parsing_errors": 0,', \' "resource_count": 0,', \' "checkov_version": "3.2.415"', \'}' \]) Execute(Handle output for all tests passed): AssertEqual \ [], \ ale_linters#cloudformation#checkov#Handle(bufnr(''), [ \'{', \' "check_type": "cloudformation",', \' "results": {', \' "failed_checks": []', \' },', \' "summary": {', \' "passed": 18,', \' "failed": 0,', \' "skipped": 0,', \' "parsing_errors": 0,', \' "resource_count": 3,', \' "checkov_version": "3.2.415"', \' }', \'}' \]) Execute(The JSON output of checkov should be handled correctly): AssertEqual \ [ \ { \ 'filename': '/sample.template.yaml', \ 'lnum': 57, \ 'end_lnum': 79, \ 'text': 'Ensure that AWS Lambda function is configured for a Dead Letter Queue(DLQ) [CKV_AWS_116]', \ 'detail': "CKV_AWS_116: Ensure that AWS Lambda function is configured for a Dead Letter Queue(DLQ)\n" . \ 'For more information, see: https://docs.prismacloud.io/en/enterprise-edition/policy-reference/aws-policies/aws-general-policies/ensure-that-aws-lambda-function-is-configured-for-a-dead-letter-queue-dlq', \ 'type': 'W', \ } \ ], \ ale_linters#cloudformation#checkov#Handle(bufnr(''), [ \'{', \' "check_type": "cloudformation",', \' "results": {', \' "failed_checks": [', \' {', \' "check_id": "CKV_AWS_116",', \' "bc_check_id": "BC_AWS_GENERAL_64",', \' "check_name": "Ensure that AWS Lambda function is configured for a Dead Letter Queue(DLQ)",', \' "check_result": {', \' "result": "FAILED",', \' "evaluated_keys": [', \' "Properties/DeadLetterQueue/TargetArn"', \' ]', \' },', \' "file_path": "/sample.template.yaml",', \' "repo_file_path": "/sample.template.yaml",', \' "file_line_range": [', \' 57,', \' 79', \' ],', \' "resource": "AWS::Serverless::Function.FunctionName",', \' "evaluations": {},', \' "check_class": "checkov.cloudformation.checks.resource.aws.LambdaDLQConfigured",', \' "entity_tags": null,', \' "resource_address": null,', \' "guideline": "https://docs.prismacloud.io/en/enterprise-edition/policy-reference/aws-policies/aws-general-policies/ensure-that-aws-lambda-function-is-configured-for-a-dead-letter-queue-dlq"', \' }', \' ]', \' }', \'}' \ ])