Before: call ale#assert#SetUpLinterTest('python', 'pylsp') let b:bin_dir = has('win32') ? 'Scripts' : 'bin' After: unlet! b:bin_dir unlet! b:executable call ale#assert#TearDownLinterTest() Execute(The pylsp command callback should return default string): AssertLinter 'pylsp', ale#Escape('pylsp') Execute(The pylsp executable should be configurable): let g:ale_python_pylsp_executable = '~/.local/bin/pylsp' AssertLinter '~/.local/bin/pylsp' , ale#Escape('~/.local/bin/pylsp') Execute(The pylsp command callback should let you set options): let g:ale_python_pylsp_options = '--some-option' AssertLinter 'pylsp', ale#Escape('pylsp') . ' --some-option' Execute(The pylsp executable should be run from the virtualenv path): call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py') let b:executable = ale#path#Simplify( \ g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir . '/pylsp' \) AssertEqual ale#Escape(b:executable), \ ale_linters#python#pylsp#GetCommand(bufnr('')) Execute(You should be able to override the pylsp virtualenv lookup): call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py') let g:ale_python_pylsp_use_global = 1 AssertLinter 'pylsp', ale#Escape('pylsp') Execute(Setting executable to 'pipenv' appends 'run pylsp'): let g:ale_python_pylsp_executable = 'path/to/pipenv' AssertLinter 'path/to/pipenv', ale#Escape('path/to/pipenv') . ' run pylsp' Execute(Pipenv is detected when python_pylsp_auto_pipenv is set): let g:ale_python_pylsp_auto_pipenv = 1 call ale#test#SetFilename('../test-files/python/pipenv/whatever.py') AssertLinter 'pipenv', \ ale#Escape('pipenv') . ' run pylsp' Execute(Should accept configuration settings): AssertLSPConfig {} let b:ale_python_pylsp_config = {'pylsp': {'plugins': {'preload': {'enabled': v:false}}}} AssertLSPConfig {'pylsp': {'plugins': {'preload': {'enabled': v:false}}}}