Before: call ale#test#SetDirectory('/testplugin/test') runtime ale_linters/json/jsonlint.vim After: let g:ale_has_override = {} let g:ale_json_jsonlint_executable = 'jsonlint' let g:ale_json_jsonlint_use_global = 0 call ale#test#RestoreDirectory() call ale#linter#Reset() Execute(local executable should be detected correctly): call ale#test#SetFilename('jsonlint-test-files/app/src/app.json') AssertEqual \ ale#path#Simplify(g:dir . '/jsonlint-test-files/app/node_modules/.bin/jsonlint'), \ ale_linters#json#jsonlint#GetExecutable(bufnr('')) Execute(recursively executable should be detected correctly): call ale#test#SetFilename('jsonlint-test-files/app-without-jsonlint/src/app.json') AssertEqual \ ale#path#Simplify(g:dir . '/jsonlint-test-files/node_modules/jsonlint/lib/cli.js'), \ ale_linters#json#jsonlint#GetExecutable(bufnr('')) Execute(use_global should override project executable): let g:ale_json_jsonlint_use_global = 1 call ale#test#SetFilename('jsonlint-test-files/app/src/app.json') AssertEqual \ 'jsonlint', \ ale_linters#json#jsonlint#GetExecutable(bufnr('')) Execute(manually defined should override default executable): let g:ale_json_jsonlint_use_global = 1 let g:ale_json_jsonlint_executable = 'custom_jsonlint' call ale#test#SetFilename('jsonlint-test-files/app/src/app.json') AssertEqual \ 'custom_jsonlint', \ ale_linters#json#jsonlint#GetExecutable(bufnr(''))