diff --git a/ale_linters/go/gosimple.vim b/ale_linters/go/gosimple.vim
index 4b7d340..9188e0d 100644
--- a/ale_linters/go/gosimple.vim
+++ b/ale_linters/go/gosimple.vim
@@ -6,4 +6,5 @@ call ale#linter#Define('go', {
 \   'executable': 'gosimple',
 \   'command': 'gosimple %t',
 \   'callback': 'ale#handlers#unix#HandleAsWarning',
+\   'output_stream': 'both'
 \})
diff --git a/ale_linters/go/staticcheck.vim b/ale_linters/go/staticcheck.vim
index c78b320..cb4a5c7 100644
--- a/ale_linters/go/staticcheck.vim
+++ b/ale_linters/go/staticcheck.vim
@@ -6,4 +6,5 @@ call ale#linter#Define('go', {
 \   'executable': 'staticcheck',
 \   'command': 'staticcheck %t',
 \   'callback': 'ale#handlers#unix#HandleAsWarning',
+\   'output_stream': 'both'
 \})
diff --git a/ale_linters/javascript/standard.vim b/ale_linters/javascript/standard.vim
index fc534eb..aa6a3a7 100644
--- a/ale_linters/javascript/standard.vim
+++ b/ale_linters/javascript/standard.vim
@@ -14,17 +14,9 @@ endfunction
 
 function! ale_linters#javascript#standard#GetCommand(buffer) abort
     let l:executable = ale_linters#javascript#standard#GetExecutable(a:buffer)
-
-    if ale#Has('win32') && l:executable =~? '\.js$'
-        " .js files have to be executed with Node on Windows.
-        let l:head = 'node ' . ale#Escape(l:executable)
-    else
-        let l:head = ale#Escape(l:executable)
-    endif
-
     let l:options = ale#Var(a:buffer, 'javascript_standard_options')
 
-    return l:head
+    return ale#node#Executable(a:buffer, l:executable)
     \   . (!empty(l:options) ? ' ' . l:options : '')
     \   . ' --stdin %s'
 endfunction
diff --git a/ale_linters/sh/shell.vim b/ale_linters/sh/shell.vim
index 8f5ca3a..cf5e4e6 100644
--- a/ale_linters/sh/shell.vim
+++ b/ale_linters/sh/shell.vim
@@ -17,18 +17,10 @@ if !exists('g:ale_sh_shell_default_shell')
 endif
 
 function! ale_linters#sh#shell#GetExecutable(buffer) abort
-    let l:banglines = getbufline(a:buffer, 1)
+    let l:shell_type = ale#handlers#sh#GetShellType(a:buffer)
 
-    " Take the shell executable from the hashbang, if we can.
-    if len(l:banglines) == 1 && l:banglines[0] =~# '^#!'
-        " Remove options like -e, etc.
-        let l:line = substitute(l:banglines[0], '--\?[a-zA-Z0-9]\+', '', 'g')
-
-        for l:possible_shell in ['bash', 'tcsh', 'csh', 'zsh', 'sh']
-            if l:line =~# l:possible_shell . '\s*$'
-                return l:possible_shell
-            endif
-        endfor
+    if !empty(l:shell_type)
+        return l:shell_type
     endif
 
     return ale#Var(a:buffer, 'sh_shell_default_shell')
diff --git a/ale_linters/sh/shellcheck.vim b/ale_linters/sh/shellcheck.vim
index 5353683..3a2d33f 100644
--- a/ale_linters/sh/shellcheck.vim
+++ b/ale_linters/sh/shellcheck.vim
@@ -19,25 +19,35 @@ function! ale_linters#sh#shellcheck#GetExecutable(buffer) abort
     return ale#Var(a:buffer, 'sh_shellcheck_executable')
 endfunction
 
-function! s:GetDialectArgument() abort
-    if exists('b:is_bash') && b:is_bash
-        return '-s bash'
-    elseif exists('b:is_sh') && b:is_sh
-        return '-s sh'
-    elseif exists('b:is_kornshell') && b:is_kornshell
-        return '-s ksh'
+function! ale_linters#sh#shellcheck#GetDialectArgument(buffer) abort
+    let l:shell_type = ale#handlers#sh#GetShellType(a:buffer)
+
+    if !empty(l:shell_type)
+        return l:shell_type
+    endif
+
+    " If there's no hashbang, try using Vim's buffer variables.
+    if get(b:, 'is_bash')
+        return 'bash'
+    elseif get(b:, 'is_sh')
+        return 'sh'
+    elseif get(b:, 'is_kornshell')
+        return 'ksh'
     endif
 
     return ''
 endfunction
 
 function! ale_linters#sh#shellcheck#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'sh_shellcheck_options')
     let l:exclude_option = ale#Var(a:buffer, 'sh_shellcheck_exclusions')
+    let l:dialect = ale_linters#sh#shellcheck#GetDialectArgument(a:buffer)
 
     return ale_linters#sh#shellcheck#GetExecutable(a:buffer)
-    \   . ' ' . ale#Var(a:buffer, 'sh_shellcheck_options')
-    \   . ' ' . (!empty(l:exclude_option) ? '-e ' . l:exclude_option : '')
-    \   . ' ' . s:GetDialectArgument() . ' -f gcc -'
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . (!empty(l:exclude_option) ? ' -e ' . l:exclude_option : '')
+    \   . (!empty(l:dialect) ? ' -s ' . l:dialect : '')
+    \   . ' -f gcc -'
 endfunction
 
 call ale#linter#Define('sh', {
diff --git a/autoload/ale.vim b/autoload/ale.vim
index 9defbd8..6941a9a 100644
--- a/autoload/ale.vim
+++ b/autoload/ale.vim
@@ -48,6 +48,7 @@ function! ale#ShouldDoNothing(buffer) abort
     \   || ale#util#InSandbox()
     \   || !ale#Var(a:buffer, 'enabled')
     \   || ale#FileTooLarge()
+    \   || getbufvar(a:buffer, '&l:statusline') =~# 'CtrlPMode.*funky'
 endfunction
 
 " (delay, [linting_flag, buffer_number])
diff --git a/autoload/ale/engine.vim b/autoload/ale/engine.vim
index 74ae0d9..c49bc9b 100644
--- a/autoload/ale/engine.vim
+++ b/autoload/ale/engine.vim
@@ -286,10 +286,6 @@ function! ale#engine#SetResults(buffer, loclist) abort
 
     if g:ale_set_quickfix || g:ale_set_loclist
         call ale#list#SetLists(a:buffer, a:loclist)
-
-        if l:linting_is_done
-            call ale#list#CloseWindowIfNeeded(a:buffer)
-        endif
     endif
 
     if exists('*ale#statusline#Update')
diff --git a/autoload/ale/fixers/clangformat.vim b/autoload/ale/fixers/clangformat.vim
index b2ed7da..b50b704 100644
--- a/autoload/ale/fixers/clangformat.vim
+++ b/autoload/ale/fixers/clangformat.vim
@@ -1,3 +1,4 @@
+scriptencoding utf-8
 " Author: Peter Renström <renstrom.peter@gmail.com>
 " Description: Fixing C/C++ files with clang-format.
 
diff --git a/autoload/ale/fixers/eslint.vim b/autoload/ale/fixers/eslint.vim
index ce65c48..ce39349 100644
--- a/autoload/ale/fixers/eslint.vim
+++ b/autoload/ale/fixers/eslint.vim
@@ -2,22 +2,23 @@
 " Description: Fixing files with eslint.
 
 function! s:FindConfig(buffer) abort
-    for l:filename in [
-    \   '.eslintrc.js',
-    \   '.eslintrc.yaml',
-    \   '.eslintrc.yml',
-    \   '.eslintrc.json',
-    \   '.eslintrc',
-    \   'package.json',
-    \]
-        let l:config = ale#path#FindNearestFile(a:buffer, l:filename)
+    for l:path in ale#path#Upwards(expand('#' . a:buffer . ':p:h'))
+        for l:basename in [
+        \   '.eslintrc.js',
+        \   '.eslintrc.yaml',
+        \   '.eslintrc.yml',
+        \   '.eslintrc.json',
+        \   '.eslintrc',
+        \]
+            let l:config = ale#path#Simplify(l:path . '/' . l:basename)
 
-        if !empty(l:config)
-            return l:config
-        endif
+            if filereadable(l:config)
+                return l:config
+            endif
+        endfor
     endfor
 
-    return ''
+    return ale#path#FindNearestFile(a:buffer, 'package.json')
 endfunction
 
 function! ale#fixers#eslint#Fix(buffer) abort
@@ -28,17 +29,9 @@ function! ale#fixers#eslint#Fix(buffer) abort
         return 0
     endif
 
-    if ale#Has('win32') && l:executable =~? 'eslint\.js$'
-        " For Windows, if we detect an eslint.js script, we need to execute
-        " it with node, or the file can be opened with a text editor.
-        let l:head = 'node ' . ale#Escape(l:executable)
-    else
-        let l:head = ale#Escape(l:executable)
-    endif
-
     return {
-    \   'command': l:head
-    \       . ' --config ' . ale#Escape(l:config)
+    \   'command': ale#node#Executable(a:buffer, l:executable)
+    \       . ' -c ' . ale#Escape(l:config)
     \       . ' --fix %t',
     \   'read_temporary_file': 1,
     \}
diff --git a/autoload/ale/fixers/standard.vim b/autoload/ale/fixers/standard.vim
index 6a0c6b6..443560e 100644
--- a/autoload/ale/fixers/standard.vim
+++ b/autoload/ale/fixers/standard.vim
@@ -11,16 +11,8 @@ endfunction
 function! ale#fixers#standard#Fix(buffer) abort
     let l:executable = ale#fixers#standard#GetExecutable(a:buffer)
 
-    if ale#Has('win32') && l:executable =~? 'cmd\.js$'
-        " For Windows, if we detect an standard.js script, we need to execute
-        " it with node, or the file can be opened with a text editor.
-        let l:head = 'node ' . ale#Escape(l:executable)
-    else
-        let l:head = ale#Escape(l:executable)
-    endif
-
     return {
-    \   'command': l:head
+    \   'command': ale#node#Executable(a:buffer, l:executable)
     \       . ' --fix %t',
     \   'read_temporary_file': 1,
     \}
diff --git a/autoload/ale/fixers/stylelint.vim b/autoload/ale/fixers/stylelint.vim
index 7d5abb7..899fcf4 100644
--- a/autoload/ale/fixers/stylelint.vim
+++ b/autoload/ale/fixers/stylelint.vim
@@ -15,16 +15,8 @@ endfunction
 function! ale#fixers#stylelint#Fix(buffer) abort
     let l:executable = ale#fixers#stylelint#GetExecutable(a:buffer)
 
-    if ale#Has('win32') && l:executable =~? 'stylelint\.js$'
-        " For Windows, if we detect an stylelint.js script, we need to execute
-        " it with node, or the file can be opened with a text editor.
-        let l:head = 'node ' . ale#Escape(l:executable)
-    else
-        let l:head = ale#Escape(l:executable)
-    endif
-
     return {
-    \   'command': l:head
+    \   'command': ale#node#Executable(a:buffer, l:executable)
     \       . ' --fix %t',
     \   'read_temporary_file': 1,
     \}
diff --git a/autoload/ale/handlers/eslint.vim b/autoload/ale/handlers/eslint.vim
index 6c5d75c..4ef7489 100644
--- a/autoload/ale/handlers/eslint.vim
+++ b/autoload/ale/handlers/eslint.vim
@@ -17,17 +17,9 @@ endfunction
 function! ale#handlers#eslint#GetCommand(buffer) abort
     let l:executable = ale#handlers#eslint#GetExecutable(a:buffer)
 
-    if ale#Has('win32') && l:executable =~? 'eslint\.js$'
-        " For Windows, if we detect an eslint.js script, we need to execute
-        " it with node, or the file can be opened with a text editor.
-        let l:head = 'node ' . ale#Escape(l:executable)
-    else
-        let l:head = ale#Escape(l:executable)
-    endif
-
     let l:options = ale#Var(a:buffer, 'javascript_eslint_options')
 
-    return l:head
+    return ale#node#Executable(a:buffer, l:executable)
     \   . (!empty(l:options) ? ' ' . l:options : '')
     \   . ' -f unix --stdin --stdin-filename %s'
 endfunction
diff --git a/autoload/ale/handlers/sh.vim b/autoload/ale/handlers/sh.vim
new file mode 100644
index 0000000..894879e
--- /dev/null
+++ b/autoload/ale/handlers/sh.vim
@@ -0,0 +1,20 @@
+" Author: w0rp <devw0rp@gmail.com>
+
+" Get the shell type for a buffer, based on the hashbang line.
+function! ale#handlers#sh#GetShellType(buffer) abort
+    let l:bang_line = get(getbufline(a:buffer, 1), 0, '')
+
+    " Take the shell executable from the hashbang, if we can.
+    if l:bang_line[:1] is# '#!'
+        " Remove options like -e, etc.
+        let l:command = substitute(l:bang_line, ' --\?[a-zA-Z0-9]\+', '', 'g')
+
+        for l:possible_shell in ['bash', 'tcsh', 'csh', 'zsh', 'sh']
+            if l:command =~# l:possible_shell . '\s*$'
+                return l:possible_shell
+            endif
+        endfor
+    endif
+
+    return ''
+endfunction
diff --git a/autoload/ale/linter.vim b/autoload/ale/linter.vim
index 80c045f..2cd773f 100644
--- a/autoload/ale/linter.vim
+++ b/autoload/ale/linter.vim
@@ -25,6 +25,7 @@ let s:default_ale_linters = {
 \   'csh': ['shell'],
 \   'go': ['gofmt', 'golint', 'go vet'],
 \   'help': [],
+\   'python': ['flake8', 'mypy', 'pylint'],
 \   'rust': ['cargo'],
 \   'spec': [],
 \   'text': [],
diff --git a/autoload/ale/list.vim b/autoload/ale/list.vim
index 7b2bf2c..ecf088a 100644
--- a/autoload/ale/list.vim
+++ b/autoload/ale/list.vim
@@ -56,6 +56,10 @@ function! s:FixList(list) abort
     return l:new_list
 endfunction
 
+function! s:BufWinId(buffer) abort
+    return exists('*bufwinid') ? bufwinid(str2nr(a:buffer)) : 0
+endfunction
+
 function! s:SetListsImpl(timer_id, buffer, loclist) abort
     let l:title = expand('#' . a:buffer . ':p')
 
@@ -72,7 +76,7 @@ function! s:SetListsImpl(timer_id, buffer, loclist) abort
         " If windows support is off, bufwinid() may not exist.
         " We'll set result in the current window, which might not be correct,
         " but is better than nothing.
-        let l:win_id = exists('*bufwinid') ? bufwinid(str2nr(a:buffer)) : 0
+        let l:win_id = s:BufWinId(a:buffer)
 
         if has('nvim')
             call setloclist(l:win_id, s:FixList(a:loclist), ' ', l:title)
@@ -82,13 +86,11 @@ function! s:SetListsImpl(timer_id, buffer, loclist) abort
         endif
     endif
 
-    let l:keep_open = ale#Var(a:buffer, 'keep_list_window_open')
-
     " Open a window to show the problems if we need to.
     "
     " We'll check if the current buffer's List is not empty here, so the
     " window will only be opened if the current buffer has problems.
-    if s:ShouldOpen(a:buffer) && (l:keep_open || !empty(a:loclist))
+    if s:ShouldOpen(a:buffer) && !empty(a:loclist)
         let l:winnr = winnr()
         let l:mode = mode()
         let l:reset_visual_selection = l:mode is? 'v' || l:mode is# "\<c-v>"
@@ -96,10 +98,10 @@ function! s:SetListsImpl(timer_id, buffer, loclist) abort
 
         if g:ale_set_quickfix
             if !ale#list#IsQuickfixOpen()
-                execute 'copen ' . str2nr(ale#Var(a:buffer, 'list_window_size'))
+                silent! execute 'copen ' . str2nr(ale#Var(a:buffer, 'list_window_size'))
             endif
         elseif g:ale_set_loclist
-            execute 'lopen ' . str2nr(ale#Var(a:buffer, 'list_window_size'))
+            silent! execute 'lopen ' . str2nr(ale#Var(a:buffer, 'list_window_size'))
         endif
 
         " If focus changed, restore it (jump to the last window).
@@ -117,10 +119,23 @@ function! s:SetListsImpl(timer_id, buffer, loclist) abort
             endif
         endif
     endif
+
+    " If ALE isn't currently checking for more problems, close the window if
+    " needed now. This check happens inside of this timer function, so
+    " the window can be closed reliably.
+    if !ale#engine#IsCheckingBuffer(a:buffer)
+        call s:CloseWindowIfNeeded(a:buffer)
+    endif
 endfunction
 
 function! ale#list#SetLists(buffer, loclist) abort
     if get(g:, 'ale_set_lists_synchronously') == 1
+    \|| getbufvar(a:buffer, 'ale_save_event_fired', 0)
+        " Update lists immediately if running a test synchronously, or if the
+        " buffer was saved.
+        "
+        " The lists need to be updated immediately when saving a buffer so
+        " that we can reliably close window automatically, if so configured.
         call s:SetListsImpl(-1, a:buffer, a:loclist)
     else
         call ale#util#StartPartialTimer(
@@ -131,7 +146,7 @@ function! ale#list#SetLists(buffer, loclist) abort
     endif
 endfunction
 
-function! s:CloseWindowIfNeededImpl(timer_id, buffer) abort
+function! s:CloseWindowIfNeeded(buffer) abort
     if ale#Var(a:buffer, 'keep_list_window_open') || !s:ShouldOpen(a:buffer)
         return
     endif
@@ -143,22 +158,14 @@ function! s:CloseWindowIfNeededImpl(timer_id, buffer) abort
             if empty(getqflist())
                 cclose
             endif
-        elseif g:ale_set_loclist && empty(getloclist(0))
-            lclose
+        else
+            let l:win_id = s:BufWinId(a:buffer)
+
+            if g:ale_set_loclist && empty(getloclist(l:win_id))
+                lclose
+            endif
         endif
     " Ignore 'Cannot close last window' errors.
     catch /E444/
     endtry
 endfunction
-
-function! ale#list#CloseWindowIfNeeded(buffer) abort
-    if get(g:, 'ale_set_lists_synchronously') == 1
-        call s:CloseWindowIfNeededImpl(-1, a:buffer)
-    else
-        call ale#util#StartPartialTimer(
-        \   0,
-        \   function('s:CloseWindowIfNeededImpl'),
-        \   [a:buffer],
-        \)
-    endif
-endfunction
diff --git a/autoload/ale/lsp.vim b/autoload/ale/lsp.vim
index b5525c9..b6c890c 100644
--- a/autoload/ale/lsp.vim
+++ b/autoload/ale/lsp.vim
@@ -242,10 +242,14 @@ function! s:HandleCommandMessage(job_id, message) abort
     call ale#lsp#HandleMessage(l:conn, a:message)
 endfunction
 
-function! s:RegisterProject(conn, project_root) abort
-    if !has_key(a:conn.projects, a:project_root)
+function! ale#lsp#RegisterProject(conn, project_root) abort
+    " Empty strings can't be used for Dictionary keys in NeoVim, due to E713.
+    " This appears to be a nonsensical bug in NeoVim.
+    let l:key = empty(a:project_root) ? '<<EMPTY>>' : a:project_root
+
+    if !has_key(a:conn.projects, l:key)
         " Tools without project roots are ready right away, like tsserver.
-        let a:conn.projects[a:project_root] = {
+        let a:conn.projects[l:key] = {
         \   'initialized': empty(a:project_root),
         \   'init_request_id': 0,
         \   'message_queue': [],
@@ -253,6 +257,12 @@ function! s:RegisterProject(conn, project_root) abort
     endif
 endfunction
 
+function! ale#lsp#GetProject(conn, project_root) abort
+    let l:key = empty(a:project_root) ? '<<EMPTY>>' : a:project_root
+
+    return get(a:conn.projects, l:key, {})
+endfunction
+
 " Start a program for LSP servers which run with executables.
 "
 " The job ID will be returned for for the program if it ran, otherwise
@@ -285,7 +295,7 @@ function! ale#lsp#StartProgram(executable, command, project_root, callback) abor
     let l:conn.id = l:job_id
     " Add the callback to the List if it's not there already.
     call uniq(sort(add(l:conn.callback_list, a:callback)))
-    call s:RegisterProject(l:conn, a:project_root)
+    call ale#lsp#RegisterProject(l:conn, a:project_root)
 
     return l:job_id
 endfunction
@@ -311,7 +321,7 @@ function! ale#lsp#ConnectToAddress(address, project_root, callback) abort
     let l:conn.id = a:address
     " Add the callback to the List if it's not there already.
     call uniq(sort(add(l:conn.callback_list, a:callback)))
-    call s:RegisterProject(l:conn, a:project_root)
+    call ale#lsp#RegisterProject(l:conn, a:project_root)
 
     return 1
 endfunction
@@ -344,7 +354,7 @@ function! ale#lsp#Send(conn_id, message, ...) abort
         return 0
     endif
 
-    let l:project = get(l:conn.projects, l:project_root, {})
+    let l:project = ale#lsp#GetProject(l:conn, l:project_root)
 
     if empty(l:project)
         return 0
diff --git a/autoload/ale/node.vim b/autoload/ale/node.vim
index 54b53fb..f75280b 100644
--- a/autoload/ale/node.vim
+++ b/autoload/ale/node.vim
@@ -1,6 +1,8 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Functions for working with Node executables.
 
+call ale#Set('windows_node_executable_path', 'node.exe')
+
 " Given a buffer number, a base variable name, and a list of paths to search
 " for in ancestor directories, detect the executable path for a Node program.
 "
@@ -20,3 +22,21 @@ function! ale#node#FindExecutable(buffer, base_var_name, path_list) abort
 
     return ale#Var(a:buffer, a:base_var_name . '_executable')
 endfunction
+
+" Create a executable string which executes a Node.js script command with a
+" Node.js executable if needed.
+"
+" The executable string should not be escaped before passing it to this
+" function, the executable string will be escaped when returned by this
+" function.
+"
+" The executable is only prefixed for Windows machines
+function! ale#node#Executable(buffer, executable) abort
+    if ale#Has('win32') && a:executable =~? '\.js$'
+        let l:node = ale#Var(a:buffer, 'windows_node_executable_path')
+
+        return ale#Escape(l:node) . ' ' . ale#Escape(a:executable)
+    endif
+
+    return ale#Escape(a:executable)
+endfunction
diff --git a/autoload/ale/sign.vim b/autoload/ale/sign.vim
index 7ba8364..dc3c110 100644
--- a/autoload/ale/sign.vim
+++ b/autoload/ale/sign.vim
@@ -184,16 +184,6 @@ function! s:GroupLoclistItems(buffer, loclist) abort
     return l:grouped_items
 endfunction
 
-function! ale#sign#SetSignColumnHighlight(has_problems) abort
-    highlight clear SignColumn
-
-    if a:has_problems
-        highlight link SignColumn ALESignColumnWithErrors
-    else
-        highlight link SignColumn ALESignColumnWithoutErrors
-    endif
-endfunction
-
 function! s:UpdateLineNumbers(buffer, current_sign_list, loclist) abort
     let l:line_map = {}
     let l:line_numbers_changed = 0
@@ -224,24 +214,32 @@ function! s:BuildSignMap(current_sign_list, grouped_items) abort
     let l:sign_offset = g:ale_sign_offset
 
     for [l:line, l:sign_id, l:name] in a:current_sign_list
-        let l:sign_map[l:line] = {
-        \   'current_id': l:sign_id,
-        \   'current_name': l:name,
+        let l:sign_info = get(l:sign_map, l:line, {
+        \   'current_id_list': [],
+        \   'current_name_list': [],
         \   'new_id': 0,
         \   'new_name': '',
         \   'items': [],
-        \}
+        \})
 
+        " Increment the sign offset for new signs, by the maximum sign ID.
         if l:sign_id > l:sign_offset
             let l:sign_offset = l:sign_id
         endif
+
+        " Remember the sign names and IDs in separate Lists, so they are easy
+        " to work with.
+        call add(l:sign_info.current_id_list, l:sign_id)
+        call add(l:sign_info.current_name_list, l:name)
+
+        let l:sign_map[l:line] = l:sign_info
     endfor
 
     for l:group in a:grouped_items
         let l:line = l:group[0].lnum
         let l:sign_info = get(l:sign_map, l:line, {
-        \   'current_id': 0,
-        \   'current_name': '',
+        \   'current_id_list': [],
+        \   'current_name_list': [],
         \   'new_id': 0,
         \   'new_name': '',
         \   'items': [],
@@ -250,11 +248,18 @@ function! s:BuildSignMap(current_sign_list, grouped_items) abort
         let l:sign_info.new_name = ale#sign#GetSignName(l:group)
         let l:sign_info.items = l:group
 
-        if l:sign_info.current_name isnot# l:sign_info.new_name
+        let l:index = index(
+        \   l:sign_info.current_name_list,
+        \   l:sign_info.new_name
+        \)
+
+        if l:index >= 0
+            " We have a sign with this name already, so use the same ID.
+            let l:sign_info.new_id = l:sign_info.current_id_list[l:index]
+        else
+            " This sign name replaces the previous name, so use a new ID.
             let l:sign_info.new_id = l:sign_offset + 1
             let l:sign_offset += 1
-        else
-            let l:sign_info.new_id = l:sign_info.current_id
         endif
 
         let l:sign_map[l:line] = l:sign_info
@@ -288,7 +293,7 @@ function! ale#sign#GetSignCommands(buffer, was_sign_set, sign_map) abort
                 let l:item.sign_id = l:info.new_id
             endfor
 
-            if l:info.new_id isnot l:info.current_id
+            if index(l:info.current_id_list, l:info.new_id) < 0
                 call add(l:command_list, 'sign place '
                 \   . (l:info.new_id)
                 \   . ' line=' . l:line_str
@@ -301,12 +306,14 @@ function! ale#sign#GetSignCommands(buffer, was_sign_set, sign_map) abort
 
     " Remove signs without new IDs.
     for l:info in values(a:sign_map)
-        if l:info.current_id && l:info.current_id isnot l:info.new_id
-            call add(l:command_list, 'sign unplace '
-            \   . (l:info.current_id)
-            \   . ' buffer=' . a:buffer
-            \)
-        endif
+        for l:current_id in l:info.current_id_list
+            if l:current_id isnot l:info.new_id
+                call add(l:command_list, 'sign unplace '
+                \   . l:current_id
+                \   . ' buffer=' . a:buffer
+                \)
+            endif
+        endfor
     endfor
 
     " Remove the dummy sign to close the sign column if we need to.
@@ -347,7 +354,19 @@ function! ale#sign#SetSigns(buffer, loclist) abort
     \   l:sign_map,
     \)
 
+    " Change the sign column color if the option is on.
+    if g:ale_change_sign_column_color && !empty(a:loclist)
+        highlight clear SignColumn
+        highlight link SignColumn ALESignColumnWithErrors
+    endif
+
     for l:command in l:command_list
         silent! execute l:command
     endfor
+
+    " Reset the sign column color when there are no more errors.
+    if g:ale_change_sign_column_color && empty(a:loclist)
+        highlight clear SignColumn
+        highlight link SignColumn ALESignColumnWithoutErrors
+    endif
 endfunction
diff --git a/doc/ale.txt b/doc/ale.txt
index 6c3be18..1fd801a 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -918,6 +918,22 @@ b:ale_warn_about_trailing_whitespace     *b:ale_warn_about_trailing_whitespace*
   This option may be configured on a per buffer basis.
 
 
+g:ale_windows_node_executable_path         *g:ale_windows_node_executable_path*
+                                           *b:ale_windows_node_executable_path*
+
+  Type: |String|
+  Default: `'node.exe'`
+
+  This variable is used as the path to the executable to use for executing
+  scripts with Node.js on Windows.
+
+  For Windows, any file with a `.js` file extension needs to be executed with
+  the node executable explicitly. Otherwise, Windows could try and open the
+  scripts with other applications, like a text editor. Therefore, these
+  scripts are executed with whatever executable is configured with this
+  setting.
+
+
 -------------------------------------------------------------------------------
 3.1. Highlights                                                *ale-highlights*
 
diff --git a/test/command_callback/test_shellcheck_command_callback.vader b/test/command_callback/test_shellcheck_command_callback.vader
new file mode 100644
index 0000000..0d8fef6
--- /dev/null
+++ b/test/command_callback/test_shellcheck_command_callback.vader
@@ -0,0 +1,47 @@
+Before:
+  Save g:ale_sh_shellcheck_exclusions
+  Save g:ale_sh_shellcheck_executable
+  Save g:ale_sh_shellcheck_options
+
+  unlet! g:ale_sh_shellcheck_exclusions
+  unlet! g:ale_sh_shellcheck_executable
+  unlet! g:ale_sh_shellcheck_options
+
+  runtime ale_linters/sh/shellcheck.vim
+
+After:
+  Restore
+
+  unlet! b:ale_sh_shellcheck_exclusions
+  unlet! b:ale_sh_shellcheck_executable
+  unlet! b:ale_sh_shellcheck_options
+  unlet! b:is_bash
+
+  call ale#linter#Reset()
+
+Execute(The default shellcheck command should be correct):
+  AssertEqual
+  \ 'shellcheck -f gcc -',
+  \ ale_linters#sh#shellcheck#GetCommand(bufnr(''))
+
+Execute(The shellcheck command should accept options):
+  let b:ale_sh_shellcheck_options = '--foobar'
+
+  AssertEqual
+  \ 'shellcheck --foobar -f gcc -',
+  \ ale_linters#sh#shellcheck#GetCommand(bufnr(''))
+
+Execute(The shellcheck command should accept options and exclusions):
+  let b:ale_sh_shellcheck_options = '--foobar'
+  let b:ale_sh_shellcheck_exclusions = 'foo,bar'
+
+  AssertEqual
+  \ 'shellcheck --foobar -e foo,bar -f gcc -',
+  \ ale_linters#sh#shellcheck#GetCommand(bufnr(''))
+
+Execute(The shellcheck command should include the dialect):
+  let b:is_bash = 1
+
+  AssertEqual
+  \ 'shellcheck -s bash -f gcc -',
+  \ ale_linters#sh#shellcheck#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_standard_command_callback.vader b/test/command_callback/test_standard_command_callback.vader
index fa90175..193ead8 100644
--- a/test/command_callback/test_standard_command_callback.vader
+++ b/test/command_callback/test_standard_command_callback.vader
@@ -67,7 +67,7 @@ Execute(.js files should be executed with node on Windows):
   \ ale_linters#javascript#standard#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ 'node ' . ale#Escape(b:executable) . ' --stdin %s',
+  \ ale#Escape('node.exe') . ' ' . ale#Escape(b:executable) . ' --stdin %s',
   \ ale_linters#javascript#standard#GetCommand(bufnr(''))
 
 Execute(The global executable should be used otherwise):
diff --git a/test/eslint-test-files/package.json b/test/eslint-test-files/package.json
new file mode 100644
index 0000000..e69de29
diff --git a/test/eslint-test-files/react-app/subdir-with-config/.eslintrc b/test/eslint-test-files/react-app/subdir-with-config/.eslintrc
new file mode 100644
index 0000000..e69de29
diff --git a/test/eslint-test-files/react-app/subdir-with-package-json/package.json b/test/eslint-test-files/react-app/subdir-with-package-json/package.json
new file mode 100644
index 0000000..e69de29
diff --git a/test/fixers/test_eslint_fixer_callback.vader b/test/fixers/test_eslint_fixer_callback.vader
index 58f7561..21eb450 100644
--- a/test/fixers/test_eslint_fixer_callback.vader
+++ b/test/fixers/test_eslint_fixer_callback.vader
@@ -13,22 +13,45 @@ Execute(The path to eslint.js should be run on Unix):
   \   'read_temporary_file': 1,
   \   'command':
   \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
-  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
+  \     . ' -c ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#Fix(bufnr(''))
 
-Execute(The eslint fixer with eslint.js should be run with node on Windows):
-  call ale#test#SetFilename('../eslint-test-files/react-app/subdir/testfile.js')
-  let g:ale_has_override['win32'] = 1
+Execute(The lower priority configuration file in a nested directory should be preferred):
+  call ale#test#SetFilename('../eslint-test-files/react-app/subdir-with-config/testfile.js')
 
-  " We have to execute the file with node.
   AssertEqual
   \ {
   \   'read_temporary_file': 1,
-  \   'command': 'node '
-  \     . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
-  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
+  \   'command':
+  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ' -c ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/subdir-with-config/.eslintrc'))
+  \     . ' --fix %t',
+  \ },
+  \ ale#fixers#eslint#Fix(bufnr(''))
+
+Execute(package.json should be used as a last resort):
+  call ale#test#SetFilename('../eslint-test-files/react-app/subdir-with-package-json/testfile.js')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command':
+  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ' -c ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
+  \     . ' --fix %t',
+  \ },
+  \ ale#fixers#eslint#Fix(bufnr(''))
+
+  call ale#test#SetFilename('../eslint-test-files/package.json')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command':
+  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/node_modules/.bin/eslint'))
+  \     . ' -c ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/package.json'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#Fix(bufnr(''))
diff --git a/test/fixers/test_standard_fixer_callback.vader b/test/fixers/test_standard_fixer_callback.vader
index 934b07b..88169bb 100644
--- a/test/fixers/test_standard_fixer_callback.vader
+++ b/test/fixers/test_standard_fixer_callback.vader
@@ -25,7 +25,7 @@ Execute(The standard fixer with standard.js should be run with node on Windows):
   AssertEqual
   \ {
   \   'read_temporary_file': 1,
-  \   'command': 'node '
+  \   'command': ale#Escape('node.exe') . ' '
   \     . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/standard/bin/cmd.js'))
   \     . ' --fix %t',
   \ },
diff --git a/test/fixers/test_stylelint_fixer_callback.vader b/test/fixers/test_stylelint_fixer_callback.vader
index 6c99196..482704d 100644
--- a/test/fixers/test_stylelint_fixer_callback.vader
+++ b/test/fixers/test_stylelint_fixer_callback.vader
@@ -25,7 +25,7 @@ Execute(The stylelint fixer with stylelint.js should be run with node on Windows
   AssertEqual
   \ {
   \   'read_temporary_file': 1,
-  \   'command': 'node '
+  \   'command': ale#Escape('node.exe') . ' '
   \     . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/stylelint/bin/stylelint.js'))
   \     . ' --fix %t',
   \ },
diff --git a/test/lsp/test_lsp_connections.vader b/test/lsp/test_lsp_connections.vader
index 1faa7a0..5549b1f 100644
--- a/test/lsp/test_lsp_connections.vader
+++ b/test/lsp/test_lsp_connections.vader
@@ -3,6 +3,7 @@ Before:
 
 After:
   unlet! b:data
+  unlet! b:conn
 
 Execute(GetNextMessageID() should increment appropriately):
   " We should get the initial ID, and increment a bit.
@@ -220,3 +221,51 @@ Execute(ale#lsp#ReadMessageData() should handle a message with part of a second
   \   . '{"id":2,"jsonrpc":"2.0","result":{"foo":"barÜ"}}'
   \   . b:data
   \ )
+
+Execute(Projects with regular project roots should be registered correctly):
+  let b:conn = {'projects': {}}
+
+  call ale#lsp#RegisterProject(b:conn, '/foo/bar')
+
+  AssertEqual
+  \ {
+  \   'projects': {
+  \     '/foo/bar': {'initialized': 0, 'message_queue': [], 'init_request_id': 0},
+  \   },
+  \ },
+  \ b:conn
+
+Execute(Projects with regular project roots should be fetched correctly):
+  let b:conn = {
+  \ 'projects': {
+  \   '/foo/bar': {'initialized': 0, 'message_queue': [], 'init_request_id': 0},
+  \ },
+  \}
+
+  AssertEqual
+  \ {'initialized': 0, 'message_queue': [], 'init_request_id': 0},
+  \ ale#lsp#GetProject(b:conn, '/foo/bar')
+
+Execute(Projects with empty project roots should be registered correctly):
+  let b:conn = {'projects': {}}
+
+  call ale#lsp#RegisterProject(b:conn, '')
+
+  AssertEqual
+  \ {
+  \   'projects': {
+  \     '<<EMPTY>>': {'initialized': 1, 'message_queue': [], 'init_request_id': 0},
+  \   },
+  \ },
+  \ b:conn
+
+Execute(Projects with empty project roots should be fetched correctly):
+  let b:conn = {
+  \ 'projects': {
+  \   '<<EMPTY>>': {'initialized': 1, 'message_queue': [], 'init_request_id': 0},
+  \ },
+  \}
+
+  AssertEqual
+  \ {'initialized': 1, 'message_queue': [], 'init_request_id': 0},
+  \ ale#lsp#GetProject(b:conn, '')
diff --git a/test/sign/test_sign_column_highlighting.vader b/test/sign/test_sign_column_highlighting.vader
index 882b03d..4457a45 100644
--- a/test/sign/test_sign_column_highlighting.vader
+++ b/test/sign/test_sign_column_highlighting.vader
@@ -1,4 +1,6 @@
 Before:
+  Save g:ale_change_sign_column_color
+
   function! ParseHighlight(name) abort
     redir => l:output
       silent execute 'highlight ' . a:name
@@ -20,14 +22,34 @@ Before:
   let g:sign_highlight = ParseHighlight('SignColumn')
 
 After:
+  Restore
+
   delfunction ParseHighlight
   call SetHighlight('SignColumn', g:sign_highlight)
   delfunction SetHighlight
   unlet! g:sign_highlight
 
+  sign unplace *
+
+Execute(The SignColumn highlight shouldn't be changed if the option is off):
+  let g:ale_change_sign_column_color = 0
+  let b:sign_highlight = ParseHighlight('SignColumn')
+
+  call ale#sign#SetSigns(bufnr(''), [
+  \ {'bufnr': bufnr(''), 'lnum': 1, 'col': 1, 'type': 'W', 'text': 'x'},
+  \])
+  AssertEqual b:sign_highlight, ParseHighlight('SignColumn')
+
+  call ale#sign#SetSigns(bufnr(''), [])
+  AssertEqual b:sign_highlight, ParseHighlight('SignColumn')
+
 Execute(The SignColumn highlight should be set and reset):
-  call ale#sign#SetSignColumnHighlight(1)
+  let g:ale_change_sign_column_color = 1
+
+  call ale#sign#SetSigns(bufnr(''), [
+  \ {'bufnr': bufnr(''), 'lnum': 1, 'col': 1, 'type': 'W', 'text': 'x'},
+  \])
   AssertEqual 'links to ALESignColumnWithErrors', ParseHighlight('SignColumn')
 
-  call ale#sign#SetSignColumnHighlight(0)
+  call ale#sign#SetSigns(bufnr(''), [])
   AssertEqual 'links to ALESignColumnWithoutErrors', ParseHighlight('SignColumn')
diff --git a/test/sign/test_sign_placement.vader b/test/sign/test_sign_placement.vader
index abae765..a196905 100644
--- a/test/sign/test_sign_placement.vader
+++ b/test/sign/test_sign_placement.vader
@@ -266,3 +266,14 @@ Execute(It should be possible to clear signs with empty lists):
 
 Execute(No exceptions should be thrown when setting signs for invalid buffers):
   call ale#sign#SetSigns(123456789, [{'lnum': 15, 'col': 2, 'type': 'W', 'text': 'e'}])
+
+Execute(Signs should be removed when lines have multiple sign IDs on them):
+  " We can fail to remove signs if there are multiple signs on one line,
+  " say after deleting lines in Vim, etc.
+  exec 'sign place 1000347 line=3 name=ALEErrorSign buffer=' . bufnr('')
+  exec 'sign place 1000348 line=3 name=ALEWarningSign buffer=' . bufnr('')
+  exec 'sign place 1000349 line=10 name=ALEErrorSign buffer=' . bufnr('')
+  exec 'sign place 1000350 line=10 name=ALEWarningSign buffer=' . bufnr('')
+
+  call ale#sign#SetSigns(bufnr(''), [])
+  AssertEqual [], ParseSigns()
diff --git a/test/test_eslint_executable_detection.vader b/test/test_eslint_executable_detection.vader
index 30ae38d..411fa13 100644
--- a/test/test_eslint_executable_detection.vader
+++ b/test/test_eslint_executable_detection.vader
@@ -58,7 +58,7 @@ Execute(eslint.js executables should be run with node on Windows):
 
   " We have to execute the file with node.
   AssertEqual
-  \   'node '''
-  \   . g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'
-  \   . ''' -f unix --stdin --stdin-filename %s',
+  \   ale#Escape('node.exe') . ' '
+  \   . ale#Escape(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js')
+  \   . ' -f unix --stdin --stdin-filename %s',
   \ ale#handlers#eslint#GetCommand(bufnr(''))
diff --git a/test/test_list_opening.vader b/test/test_list_opening.vader
index 7d386d8..63b30ef 100644
--- a/test/test_list_opening.vader
+++ b/test/test_list_opening.vader
@@ -6,12 +6,14 @@ Before:
   Save g:ale_keep_list_window_open
   Save g:ale_list_window_size
   Save g:ale_buffer_info
+  Save g:ale_set_lists_synchronously
 
   let g:ale_set_loclist = 1
   let g:ale_set_quickfix = 0
   let g:ale_open_list = 0
   let g:ale_keep_list_window_open = 0
   let g:ale_list_window_size = 10
+  let g:ale_set_lists_synchronously = 1
 
   let g:loclist = [
   \ {'bufnr': bufnr(''), 'lnum': 5, 'col': 5, 'text': 'x'},
@@ -70,17 +72,14 @@ Execute(The quickfix window should open for just the loclist):
 
   " It should not open for an empty list.
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert !ale#list#IsQuickfixOpen()
 
   " With a non-empty loclist, the window must open.
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert ale#list#IsQuickfixOpen()
 
   " Clear the list and it should close again.
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert !ale#list#IsQuickfixOpen()
 
 Execute(The quickfix window height should be correct for the loclist):
@@ -88,7 +87,6 @@ Execute(The quickfix window height should be correct for the loclist):
   let g:ale_list_window_size = 7
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
 
   AssertEqual 7, GetQuickfixHeight()
 
@@ -97,7 +95,6 @@ Execute(The quickfix window height should be correct for the loclist with buffer
   let b:ale_list_window_size = 8
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
 
   AssertEqual 8, GetQuickfixHeight()
 
@@ -107,16 +104,13 @@ Execute(The quickfix window should stay open for just the loclist):
 
   " The window should stay open after even after it is made blank again.
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert ale#list#IsQuickfixOpen()
 
 Execute(The quickfix window should not open by default when quickfix is on):
   let g:ale_set_quickfix = 1
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert !ale#list#IsQuickfixOpen()
 
 Execute(The quickfix window should open for the quickfix list):
@@ -129,24 +123,20 @@ Execute(The quickfix window should open for the quickfix list):
 
   " It should not open for an empty list.
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert !ale#list#IsQuickfixOpen(), 'The quickfix window was opened when the list was empty'
 
   " With a non-empty quickfix list, the window must open.
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert ale#list#IsQuickfixOpen(), 'The quickfix window was closed when the list was not empty'
 
   " Clear this List. The window should stay open, as there are other items.
   let g:ale_buffer_info[bufnr('')].loclist = []
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert ale#list#IsQuickfixOpen(), 'The quickfix window closed even though there are items in another buffer'
 
   " Clear the other List now. Now the window should close.
   call remove(g:ale_buffer_info, bufnr('') + 1)
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert !ale#list#IsQuickfixOpen(), 'The quickfix window was not closed'
 
 Execute(The quickfix window should stay open for the quickfix list):
@@ -156,9 +146,7 @@ Execute(The quickfix window should stay open for the quickfix list):
 
   " The window should stay open after even after it is made blank again.
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   Assert ale#list#IsQuickfixOpen()
 
 Execute(The quickfix window height should be correct for the quickfix list):
@@ -167,7 +155,6 @@ Execute(The quickfix window height should be correct for the quickfix list):
   let g:ale_list_window_size = 7
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
 
   AssertEqual 7, GetQuickfixHeight()
 
@@ -177,7 +164,6 @@ Execute(The quickfix window height should be correct for the quickfix list with
   let b:ale_list_window_size = 8
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
 
   AssertEqual 8, GetQuickfixHeight()
 
@@ -192,9 +178,7 @@ Execute(The buffer ale_keep_list_window_open option should be respected):
   let b:ale_keep_list_window_open = 1
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
   call ale#list#SetLists(bufnr('%'), [])
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
 
   Assert ale#list#IsQuickfixOpen()
 
@@ -205,12 +189,19 @@ Execute(The ale_open_list='on_save' option should work):
   " The list shouldn't open yet, the event wasn't fired.
   Assert !ale#list#IsQuickfixOpen()
 
+  " Turn this option off, to ensure that we update lists immediately when we
+  " save buffers.
+  let g:ale_set_lists_synchronously = 0
   let b:ale_save_event_fired = 1
 
   call ale#list#SetLists(bufnr('%'), g:loclist)
   " Now the list should have opened.
   Assert ale#list#IsQuickfixOpen()
 
+  call ale#list#SetLists(bufnr('%'), [])
+  " The window should close again when the loclist is empty.
+  Assert !ale#list#IsQuickfixOpen()
+
 Execute(The window shouldn't open on save when ale_open_list=0):
   let b:ale_open_list = 0
   let b:ale_save_event_fired = 1
diff --git a/test/test_set_list_timers.vader b/test/test_set_list_timers.vader
index 90aacb5..f8fcb6a 100644
--- a/test/test_set_list_timers.vader
+++ b/test/test_set_list_timers.vader
@@ -27,12 +27,3 @@ Execute(The SetLists function should work when run in a timer):
   \ 'type': 'E',
   \ 'pattern': '',
   \}], getloclist(0)
-
-Execute(The CloseWindowIfNeeded function should work when run in a timer):
-  let g:ale_open_list = 1
-  lopen
-
-  call ale#list#CloseWindowIfNeeded(bufnr(''))
-  sleep 1ms
-
-  Assert !ale#list#IsQuickfixOpen(), 'The window was not closed!'
diff --git a/test/test_shell_detection.vader b/test/test_shell_detection.vader
new file mode 100644
index 0000000..37cf43c
--- /dev/null
+++ b/test/test_shell_detection.vader
@@ -0,0 +1,83 @@
+Before:
+  runtime ale_linters/sh/shell.vim
+  runtime ale_linters/sh/shellcheck.vim
+
+After:
+  call ale#linter#Reset()
+
+  unlet! b:is_bash
+  unlet! b:is_sh
+  unlet! b:is_kornshell
+
+Given(A file with a Bash hashbang):
+  #!/bin/bash
+
+Execute(/bin/bash should be detected appropriately):
+  AssertEqual 'bash', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'bash', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'bash', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with /bin/sh):
+  #!/usr/bin/env sh -eu --foobar
+
+Execute(/bin/sh should be detected appropriately):
+  AssertEqual 'sh', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'sh', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'sh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with bash as an argument to env):
+  #!/usr/bin/env bash
+
+Execute(/usr/bin/env bash should be detected appropriately):
+  AssertEqual 'bash', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'bash', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'bash', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with a tcsh hash bang and arguments):
+  #!/usr/bin/env tcsh -eu --foobar
+
+Execute(tcsh should be detected appropriately):
+  AssertEqual 'tcsh', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'tcsh', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'tcsh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with a zsh hash bang and arguments):
+  #!/usr/bin/env zsh -eu --foobar
+
+Execute(zsh should be detected appropriately):
+  AssertEqual 'zsh', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'zsh', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'zsh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with a csh hash bang and arguments):
+  #!/usr/bin/env csh -eu --foobar
+
+Execute(zsh should be detected appropriately):
+  AssertEqual 'csh', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'csh', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'csh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file with a sh hash bang and arguments):
+  #!/usr/bin/env sh -eu --foobar
+
+Execute(sh should be detected appropriately):
+  AssertEqual 'sh', ale#handlers#sh#GetShellType(bufnr(''))
+  AssertEqual 'sh', ale_linters#sh#shell#GetExecutable(bufnr(''))
+  AssertEqual 'sh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Given(A file without a hashbang):
+
+Execute(The bash dialect should be used for shellcheck if b:is_bash is 1):
+  let b:is_bash = 1
+
+  AssertEqual 'bash', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Execute(The sh dialect should be used for shellcheck if b:is_sh is 1):
+  let b:is_sh = 1
+
+  AssertEqual 'sh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
+
+Execute(The ksh dialect should be used for shellcheck if b:is_kornshell is 1):
+  let b:is_kornshell = 1
+
+  AssertEqual 'ksh', ale_linters#sh#shellcheck#GetDialectArgument(bufnr(''))
diff --git a/test/test_should_do_nothing_conditions.vader b/test/test_should_do_nothing_conditions.vader
new file mode 100644
index 0000000..4d6facf
--- /dev/null
+++ b/test/test_should_do_nothing_conditions.vader
@@ -0,0 +1,12 @@
+Before:
+  Save &l:statusline
+
+After:
+  Restore
+
+Execute(ALE shouldn't do much of anything for ctrlp-funky buffers):
+  Assert !ale#ShouldDoNothing(bufnr('')), 'The preliminary check failed'
+
+  let &l:statusline = '%#CtrlPMode2# prt %*%#CtrlPMode1# line %* <mru>={%#CtrlPMode1# funky %*}=<fil> <-> %=%<%#CtrlPMode2# %{getcwd()} %*'
+
+  Assert ale#ShouldDoNothing(bufnr(''))