diff --git a/.appveyor.yml b/.appveyor.yml
index f6e7d5d332..541139532f 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -36,4 +36,5 @@ install:
 
 test_script:
   - cd C:\testplugin
-  - 'C:\vim\vim\vim80\vim.exe -u test\vimrc "+Vader! test/test_path_uri.vader"'
+  - 'C:\vim\vim\vim80\vim.exe -u test\vimrc "+Vader!
+    test/*.vader test/*/*.vader test/*/*/*.vader test/*/*/*.vader"'
diff --git a/autoload/ale/engine.vim b/autoload/ale/engine.vim
index 890d3df2df..1b22df4688 100644
--- a/autoload/ale/engine.vim
+++ b/autoload/ale/engine.vim
@@ -841,7 +841,7 @@ function! ale#engine#WaitForJobs(deadline) abort
 
     " Gather all of the jobs from every buffer.
     for l:info in values(g:ale_buffer_info)
-        call extend(l:job_list, l:info.job_list)
+        call extend(l:job_list, get(l:info, 'job_list', []))
     endfor
 
     " NeoVim has a built-in API for this, so use that.
@@ -889,7 +889,7 @@ function! ale#engine#WaitForJobs(deadline) abort
 
     " Check again to see if any jobs are running.
     for l:info in values(g:ale_buffer_info)
-        for l:job_id in l:info.job_list
+        for l:job_id in get(l:info, 'job_list', [])
             if ale#job#IsRunning(l:job_id)
                 let l:has_new_jobs = 1
                 break
diff --git a/test/test_ale_fix.vader b/test/test_ale_fix.vader
index b5c16724af..9968c4a59e 100644
--- a/test/test_ale_fix.vader
+++ b/test/test_ale_fix.vader
@@ -11,11 +11,18 @@ Before:
   let g:ale_enabled = 0
   let g:ale_echo_cursor = 0
   let g:ale_run_synchronously = 1
+  let g:ale_set_lists_synchronously = 1
   let g:ale_fix_buffer_data = {}
   let g:ale_fixers = {
   \ 'testft': [],
   \}
-  let &shell = '/bin/bash'
+
+  if !has('win32')
+    let &shell = '/bin/bash'
+  endif
+
+  call ale#test#SetDirectory('/testplugin/test')
+  call ale#test#SetFilename('test.txt')
 
   function AddCarets(buffer, lines) abort
     " map() is applied to the original lines here.
@@ -67,6 +74,7 @@ Before:
 After:
   Restore
   unlet! g:ale_run_synchronously
+  unlet! g:ale_set_lists_synchronously
   unlet! g:ale_emulate_job_failure
   unlet! b:ale_fixers
   delfunction AddCarets
@@ -79,6 +87,9 @@ After:
   delfunction RemoveLastLineOneArg
   delfunction TestCallback
   delfunction SetUpLinters
+
+  call ale#test#RestoreDirectory()
+
   call ale#fix#registry#ResetToDefaults()
   call ale#linter#Reset()
 
@@ -129,8 +140,13 @@ Expect(Only the second function should be applied):
   $c
 
 Execute(ALEFix should allow commands to be run):
-  let g:ale_fixers.testft = ['CatLine']
-  ALEFix
+  if has('win32')
+    " Just skip this test on Windows, we can't run it.
+    call setline(1, ['a', 'b', 'c', 'd'])
+  else
+    let g:ale_fixers.testft = ['CatLine']
+    ALEFix
+  endif
 
 Expect(An extra line should be added):
   a
@@ -139,22 +155,39 @@ Expect(An extra line should be added):
   d
 
 Execute(ALEFix should allow temporary files to be read):
-  let g:ale_fixers.testft = ['ReplaceWithTempFile']
-  ALEFix
+  if has('win32')
+    " Just skip this test on Windows, we can't run it.
+    call setline(1, ['x'])
+    2,3d
+  else
+    let g:ale_fixers.testft = ['ReplaceWithTempFile']
+    ALEFix
+  endif
 
 Expect(The line we wrote to the temporary file should be used here):
   x
 
 Execute(ALEFix should allow jobs and simple functions to be combined):
-  let g:ale_fixers.testft = ['ReplaceWithTempFile', 'AddDollars']
-  ALEFix
+  if has('win32')
+    " Just skip this test on Windows, we can't run it.
+    call setline(1, ['$x'])
+    2,3d
+  else
+    let g:ale_fixers.testft = ['ReplaceWithTempFile', 'AddDollars']
+    ALEFix
+  endif
 
 Expect(The lines from the temporary file should be modified):
   $x
 
 Execute(ALEFix should send lines modified by functions to jobs):
-  let g:ale_fixers.testft = ['AddDollars', 'CatLine']
-  ALEFix
+  if has('win32')
+    " Just skip this test on Windows, we can't run it.
+    call setline(1, ['$a', '$b', '$c', 'd'])
+  else
+    let g:ale_fixers.testft = ['AddDollars', 'CatLine']
+    ALEFix
+  endif
 
 Expect(The lines should first be modified by the function, then the job):
   $a
@@ -257,18 +290,20 @@ Execute(ALEFix should save files on the save event):
   AssertEqual ['$a', '$b', '$c'], readfile('fix_test_file')
   Assert !&modified, 'The was marked as ''modified'''
 
-  " We have run the linter.
-  AssertEqual [{
-  \   'bufnr': bufnr('%'),
-  \   'lnum': 1,
-  \   'vcol': 0,
-  \   'col': 1,
-  \   'text': 'xxx',
-  \   'type': 'E',
-  \   'nr': -1,
-  \   'pattern': '',
-  \   'valid': 1,
-  \}], getloclist(0)
+  if !has('win32')
+    " We should have run the linter.
+    AssertEqual [{
+    \   'bufnr': bufnr('%'),
+    \   'lnum': 1,
+    \   'vcol': 0,
+    \   'col': 1,
+    \   'text': 'xxx',
+    \   'type': 'E',
+    \   'nr': -1,
+    \   'pattern': '',
+    \   'valid': 1,
+    \}], getloclist(0)
+  endif
 
 Expect(The buffer should be modified):
   $a
@@ -294,18 +329,20 @@ Execute(ALEFix should still lint with no linters to be applied):
 
   Assert !filereadable('fix_test_file'), 'The file should not have been saved'
 
-  " We have run the linter.
-  AssertEqual [{
-  \   'bufnr': bufnr('%'),
-  \   'lnum': 1,
-  \   'vcol': 0,
-  \   'col': 1,
-  \   'text': 'xxx',
-  \   'type': 'E',
-  \   'nr': -1,
-  \   'pattern': '',
-  \   'valid': 1,
-  \}], getloclist(0)
+  if !has('win32')
+    " We have run the linter.
+    AssertEqual [{
+    \   'bufnr': bufnr('%'),
+    \   'lnum': 1,
+    \   'vcol': 0,
+    \   'col': 1,
+    \   'text': 'xxx',
+    \   'type': 'E',
+    \   'nr': -1,
+    \   'pattern': '',
+    \   'valid': 1,
+    \}], getloclist(0)
+  endif
 
 Expect(The buffer should be the same):
   a
@@ -326,18 +363,20 @@ Execute(ALEFix should still lint when nothing was fixed on save):
 
   Assert !filereadable('fix_test_file'), 'The file should not have been saved'
 
-  " We have run the linter.
-  AssertEqual [{
-  \   'bufnr': bufnr('%'),
-  \   'lnum': 1,
-  \   'vcol': 0,
-  \   'col': 1,
-  \   'text': 'xxx',
-  \   'type': 'E',
-  \   'nr': -1,
-  \   'pattern': '',
-  \   'valid': 1,
-  \}], getloclist(0)
+  if !has('win32')
+    " We should have run the linter.
+    AssertEqual [{
+    \   'bufnr': bufnr('%'),
+    \   'lnum': 1,
+    \   'vcol': 0,
+    \   'col': 1,
+    \   'text': 'xxx',
+    \   'type': 'E',
+    \   'nr': -1,
+    \   'pattern': '',
+    \   'valid': 1,
+    \}], getloclist(0)
+  endif
 
 Expect(The buffer should be the same):
   a
@@ -358,7 +397,7 @@ Execute(ale#fix#InitBufferData() should set up the correct data):
   \ bufnr(''): {
   \   'temporary_directory_list': [],
   \   'vars': b:,
-  \   'filename': simplify(getcwd() . '/fix_test_file'),
+  \   'filename': ale#path#Winify(getcwd() . '/fix_test_file'),
   \   'done': 0,
   \   'lines_before': ['a', 'b', 'c'],
   \   'should_save': 1,
@@ -374,8 +413,13 @@ Expect(There should be only two lines):
   b
 
 Execute(ALEFix functions returning jobs should be able to accept one argument):
-  let g:ale_fixers.testft = ['CatLine']
-  ALEFix
+  if has('win32')
+    " Just skip this test on Windows, we can't run it.
+    call setline(1, ['a', 'b', 'c', 'd'])
+  else
+    let g:ale_fixers.testft = ['CatLine']
+    ALEFix
+  endif
 
 Expect(An extra line should be added):
   a
diff --git a/test/test_ale_info.vader b/test/test_ale_info.vader
index 8ab5ad54c2..ceb65af66a 100644
--- a/test/test_ale_info.vader
+++ b/test/test_ale_info.vader
@@ -354,7 +354,7 @@ Execute (ALEInfo command history should print command output if logging is on):
 
 Execute (ALEInfo should include executable checks in the history):
   call ale#linter#Define('testft', g:testlinter1)
-  call ale#engine#IsExecutable(bufnr(''), 'echo')
+  call ale#engine#IsExecutable(bufnr(''), has('win32') ? 'cmd' : 'echo')
   call ale#engine#IsExecutable(bufnr(''), 'TheresNoWayThisIsExecutable')
 
   call CheckInfo([
@@ -365,6 +365,6 @@ Execute (ALEInfo should include executable checks in the history):
   \ '',
   \] + g:globals_lines + g:command_header + [
   \ '',
-  \ '(executable check - success) echo',
+  \ '(executable check - success) ' . (has('win32') ? 'cmd' : 'echo'),
   \ '(executable check - failure) TheresNoWayThisIsExecutable',
   \])
diff --git a/test/test_ale_lint_command.vader b/test/test_ale_lint_command.vader
index 42554ec141..d36b21773c 100644
--- a/test/test_ale_lint_command.vader
+++ b/test/test_ale_lint_command.vader
@@ -28,7 +28,7 @@ Before:
     \ 'lnum': 2,
     \ 'vcol': 0,
     \ 'col': 3,
-    \ 'text': a:output[0],
+    \ 'text': join(split(a:output[0])),
     \ 'type': 'E',
     \ 'nr': -1,
     \}]
@@ -37,7 +37,7 @@ Before:
   call ale#linter#Define('foobar', {
   \ 'name': 'testlinter',
   \ 'callback': 'ToggleTestCallback',
-  \ 'executable': 'echo',
+  \ 'executable': has('win32') ? 'cmd' : 'echo',
   \ 'command': 'echo foo bar',
   \})
 
@@ -63,5 +63,11 @@ Execute(ALELint should run the linters):
   ALELint
   call ale#engine#WaitForJobs(2000)
 
+  if !has('nvim')
+    " Sleep so the delayed list function can run.
+    " This breaks the tests in NeoVim for some reason.
+    sleep 1ms
+  endif
+
   " Check the loclist
   AssertEqual g:expected_loclist, getloclist(0)
diff --git a/test/test_ale_toggle.vader b/test/test_ale_toggle.vader
index f5d8599fdb..f3dbf10274 100644
--- a/test/test_ale_toggle.vader
+++ b/test/test_ale_toggle.vader
@@ -67,7 +67,7 @@ Before:
   call ale#linter#Define('foobar', {
   \ 'name': 'testlinter',
   \ 'callback': 'ToggleTestCallback',
-  \ 'executable': 'echo',
+  \ 'executable': has('win32') ? 'cmd' : 'echo',
   \ 'command': 'echo',
   \ 'read_buffer': 0,
   \})
diff --git a/test/test_c_import_paths.vader b/test/test_c_import_paths.vader
index dac73f0803..af185eae62 100644
--- a/test/test_c_import_paths.vader
+++ b/test/test_c_import_paths.vader
@@ -39,8 +39,8 @@ Execute(The C GCC handler should include 'include' directories for projects with
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -52,8 +52,8 @@ Execute(The C GCC handler should include 'include' directories for projects with
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/configure_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/configure_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -65,8 +65,8 @@ Execute(The C GCC handler should include root directories for projects with .h f
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/h_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/h_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -78,8 +78,8 @@ Execute(The C GCC handler should include root directories for projects with .hpp
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -91,8 +91,8 @@ Execute(The C Clang handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -104,8 +104,8 @@ Execute(The C Clang handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/h_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/h_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -117,8 +117,8 @@ Execute(The C Clang handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/h_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/h_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -130,8 +130,8 @@ Execute(The C Clang handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -143,8 +143,8 @@ Execute(The C++ GCC handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -156,8 +156,8 @@ Execute(The C++ GCC handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/configure_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/configure_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -169,8 +169,8 @@ Execute(The C++ GCC handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/h_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/h_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -182,8 +182,8 @@ Execute(The C++ GCC handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -195,8 +195,8 @@ Execute(The C++ Clang handler should include 'include' directories for projects
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/makefile_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -208,8 +208,8 @@ Execute(The C++ Clang handler should include 'include' directories for projects
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/configure_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/configure_project/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -221,8 +221,8 @@ Execute(The C++ Clang handler should include root directories for projects with
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/h_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/h_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -234,8 +234,8 @@ Execute(The C++ Clang handler should include root directories for projects with
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project/subdir') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/hpp_file_project') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -255,8 +255,8 @@ Execute(The C++ Clang handler shoud use the include directory based on the .git
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(g:dir .  '/test_c_projects/git_and_nested_makefiles/src') . ' '
-  \   . ' -I' . ale#Escape(g:dir .  '/test_c_projects/git_and_nested_makefiles/include') . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/git_and_nested_makefiles/src')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/git_and_nested_makefiles') . '/include') . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -267,8 +267,8 @@ Execute(The C++ ClangTidy handler should include json folders for projects with
 
   AssertEqual
   \ ale#Escape('clang-tidy')
-  \   . ' -checks=''*'' %s '
-  \   . '-p ' . ale#Escape(g:dir . '/test_c_projects/json_project/build')
+  \   . ' -checks=' . ale#Escape('*') . ' %s '
+  \   . '-p ' . ale#Escape(ale#path#Winify(g:dir . '/test_c_projects/json_project') . '/build')
   \ , ale_linters#cpp#clangtidy#GetCommand(bufnr(''))
 
 Execute(Move .git/HEAD back):
diff --git a/test/test_command_chain.vader b/test/test_command_chain.vader
index 16472041a9..9059d630a0 100644
--- a/test/test_command_chain.vader
+++ b/test/test_command_chain.vader
@@ -1,7 +1,11 @@
 Before:
   Save &shell, g:ale_run_synchronously
   let g:ale_run_synchronously = 1
-  set shell=/bin/sh
+
+  if !has('win32')
+    set shell=/bin/sh
+  endif
+
   let g:linter_output = []
   let g:first_echo_called = 0
   let g:second_echo_called = 0
@@ -9,7 +13,7 @@ Before:
 
   function! CollectResults(buffer, output)
     let g:final_callback_called = 1
-    let g:linter_output = a:output
+    let g:linter_output = map(copy(a:output), 'join(split(v:val))')
     return []
   endfunction
   function! RunFirstEcho(buffer)
@@ -26,7 +30,7 @@ Before:
   call ale#linter#Define('foobar', {
   \ 'name': 'testlinter',
   \ 'callback': 'CollectResults',
-  \ 'executable': 'echo',
+  \ 'executable': has('win32') ? 'cmd' : 'echo',
   \ 'command_chain': [
   \   {
   \     'callback': 'RunFirstEcho',
diff --git a/test/test_csslint_config_detection.vader b/test/test_csslint_config_detection.vader
index b4707dc043..d84a00f97c 100644
--- a/test/test_csslint_config_detection.vader
+++ b/test/test_csslint_config_detection.vader
@@ -13,7 +13,7 @@ Execute(--config should be set when the .csslintrc file is found):
   AssertEqual
   \ (
   \   'csslint --format=compact '
-  \   . '--config=' . shellescape(g:dir . '/csslint-test-files/some-app/.csslintrc')
+  \   . '--config=' . ale#Escape(ale#path#Winify(g:dir . '/csslint-test-files/some-app/.csslintrc'))
   \   . ' %t'
   \ ),
   \ ale_linters#css#csslint#GetCommand(bufnr(''))
diff --git a/test/test_elm_executable_detection.vader b/test/test_elm_executable_detection.vader
index 7b758fc21d..cca8a6e473 100644
--- a/test/test_elm_executable_detection.vader
+++ b/test/test_elm_executable_detection.vader
@@ -12,7 +12,7 @@ Execute(should get valid executable with default params):
   call ale#test#SetFilename('elm-test-files/app/testfile.elm')
 
   AssertEqual
-  \ g:dir . '/elm-test-files/app/node_modules/.bin/elm-make',
+  \ ale#path#Winify(g:dir . '/elm-test-files/app/node_modules/.bin/elm-make'),
   \ ale_linters#elm#make#GetExecutable(bufnr(''))
 
 Execute(should get valid executable with 'use_global' params):
diff --git a/test/test_errors_removed_after_filetype_changed.vader b/test/test_errors_removed_after_filetype_changed.vader
index 0498a501c5..92d248d0cd 100644
--- a/test/test_errors_removed_after_filetype_changed.vader
+++ b/test/test_errors_removed_after_filetype_changed.vader
@@ -13,7 +13,7 @@ Before:
   call ale#linter#Define('foobar', {
   \ 'name': 'buffer_linter',
   \ 'callback': 'TestCallback',
-  \ 'executable': 'true',
+  \ 'executable': has('win32') ? 'cmd': 'true',
   \ 'command': 'true',
   \ 'read_buffer': 0,
   \})
@@ -21,7 +21,7 @@ Before:
   call ale#linter#Define('foobar2', {
   \ 'name': 'buffer_linter',
   \ 'callback': 'TestCallback',
-  \ 'executable': 'true',
+  \ 'executable': has('win32') ? 'cmd': 'true',
   \ 'command': 'true',
   \ 'read_buffer': 0,
   \})
@@ -41,12 +41,14 @@ After:
 
 Execute(Error should be removed when the filetype changes to something else we cannot check):
   call ale#Queue(0)
+  sleep 1ms
 
   AssertEqual 1, len(getloclist(0))
 
   noautocmd let &filetype = 'foobar2'
 
   call ale#Queue(0)
+  sleep 1ms
 
   " We should get some items from the second filetype.
   AssertEqual 1, len(getloclist(0))
@@ -54,5 +56,6 @@ Execute(Error should be removed when the filetype changes to something else we c
   noautocmd let &filetype = 'xxx'
 
   call ale#Queue(0)
+  sleep 1ms
 
   AssertEqual 0, len(getloclist(0))
diff --git a/test/test_eslint_executable_detection.vader b/test/test_eslint_executable_detection.vader
index 411fa134d5..ee792421c2 100644
--- a/test/test_eslint_executable_detection.vader
+++ b/test/test_eslint_executable_detection.vader
@@ -17,7 +17,7 @@ Execute(create-react-app directories should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/react-app/subdir/testfile.js')
 
   AssertEqual
-  \ g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js',
+  \ ale#path#Winify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(use-global should override create-react-app detection):
@@ -33,7 +33,7 @@ Execute(other app directories should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/other-app/subdir/testfile.js')
 
   AssertEqual
-  \ g:dir . '/eslint-test-files/node_modules/.bin/eslint',
+  \ ale#path#Winify(g:dir . '/eslint-test-files/node_modules/.bin/eslint'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(use-global should override other app directories):
@@ -49,7 +49,7 @@ Execute(eslint_d should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/app-with-eslint-d/testfile.js')
 
   AssertEqual
-  \ g:dir . '/eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d',
+  \ ale#path#Winify(g:dir . '/eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(eslint.js executables should be run with node on Windows):
@@ -59,6 +59,6 @@ Execute(eslint.js executables should be run with node on Windows):
   " We have to execute the file with node.
   AssertEqual
   \   ale#Escape('node.exe') . ' '
-  \   . ale#Escape(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js')
+  \   . ale#Escape(ale#path#Winify(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_find_nearest_directory.vader b/test/test_find_nearest_directory.vader
index 03d38862ec..1442c8fcee 100644
--- a/test/test_find_nearest_directory.vader
+++ b/test/test_find_nearest_directory.vader
@@ -8,7 +8,7 @@ Execute(We should be able to find a directory some directory down):
   call ale#test#SetFilename('top/middle/bottom/dummy.txt')
 
   AssertEqual
-  \ expand('%:p:h:h:h:h') . '/top/ale-special-directory-name-dont-use-this-please/',
+  \ ale#path#Winify(expand('%:p:h:h:h:h') . '/top/ale-special-directory-name-dont-use-this-please/'),
   \ ale#path#FindNearestDirectory(bufnr('%'), 'ale-special-directory-name-dont-use-this-please')
 
 Execute(We shouldn't find anything for files which don't match):
diff --git a/test/test_flow_command.vader b/test/test_flow_command.vader
index d984286985..32ceb57cc9 100644
--- a/test/test_flow_command.vader
+++ b/test/test_flow_command.vader
@@ -9,13 +9,17 @@ After:
 Execute(flow should return a command to run if a .flowconfig file exists):
   call ale#test#SetFilename('flow/a/sub/dummy')
 
-  AssertEqual '''flow'' check-contents --respect-pragma --json --from ale %s', ale_linters#javascript#flow#GetCommand(bufnr('%'), [])
+  AssertEqual
+  \ ale#Escape('flow')
+  \   . ' check-contents --respect-pragma --json --from ale %s',
+  \ ale_linters#javascript#flow#GetCommand(bufnr('%'), [])
 
 Execute(flow should should not use --respect-pragma for old versions):
   call ale#test#SetFilename('flow/a/sub/dummy')
 
   AssertEqual
-  \ '''flow'' check-contents --json --from ale %s',
+  \ ale#Escape('flow')
+  \   . ' check-contents --json --from ale %s',
   \ ale_linters#javascript#flow#GetCommand(bufnr('%'), [
   \   'Warning: `flow --version` is deprecated in favor of `flow version`',
   \   'Flow, a static type checker for JavaScript, version 0.27.0',