Before: call ale#assert#SetUpLinterTest('ansible', 'language_server') After: call ale#assert#TearDownLinterTest() Execute(The ansible language server command callback should return default string): AssertLinter 'ansible-language-server', ale#Escape('ansible-language-server') . ' --stdio' Execute(The ansible language server executable should be configurable): let g:ale_ansible_language_server_executable = '~/.local/bin/als' AssertLinter '~/.local/bin/als' , ale#Escape('~/.local/bin/als') . ' --stdio' Execute(Should accept configuration settings): AssertLSPConfig {} let b:ale_ansible_language_server_config = {'ansible-language-server': {'ansible': {'completion': {'provideRedirectModules': v:false}}}} AssertLSPConfig {'ansible-language-server': {'ansible': {'completion': {'provideRedirectModules': v:false}}}}