diff --git a/Dockerfile b/Dockerfile
index 0f82c4a2..20a43bca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM tweekmonster/vim-testbed:latest
 
 RUN install_vim -tag v8.0.0027 -build \
-                -tag neovim:v0.2.1 -build \
+                -tag neovim:v0.2.0 -build \
                 -tag neovim:v0.3.0 -build
 
 ENV PACKAGES="\
diff --git a/autoload/ale/balloon.vim b/autoload/ale/balloon.vim
index d49dcbf9..7a380da2 100644
--- a/autoload/ale/balloon.vim
+++ b/autoload/ale/balloon.vim
@@ -34,7 +34,11 @@ function! ale#balloon#Expr() abort
 endfunction
 
 function! ale#balloon#Disable() abort
-    set noballooneval noballoonevalterm
+    if has('balloon_eval_term')
+        set noballoonevalterm
+    endif
+
+    set noballooneval
     set balloonexpr=
 endfunction
 
diff --git a/run-tests b/run-tests
index c228f15d..59558d4f 100755
--- a/run-tests
+++ b/run-tests
@@ -12,14 +12,20 @@ set -u
 # --neovim-only  Run tests only for NeoVim
 #    --vim-only  Run tests only for Vim
 
-current_image_id=d5a1b5915b09
 image=w0rp/ale
+current_image_id=13b990377be9
+current_digest=sha256:4b0f7c69e5a8cbb4e401aee039e5b468d6d9ad6cd01de62e918d98f0df1a5340
+
+# Used in all test scripts for running the selected Docker image.
+DOCKER_RUN_IMAGE="$image:$current_image_id"
+export DOCKER_RUN_IMAGE
 
 tests='test/*.vader test/*/*.vader test/*/*/*.vader test/*/*/*.vader'
 # These flags are forwarded to the script for running Vader tests.
 verbose_flag=''
 quiet_flag=''
-run_neovim_tests=1
+run_neovim_02_tests=1
+run_neovim_03_tests=1
 run_vim_tests=1
 run_vint=1
 run_custom_checks=1
@@ -40,8 +46,23 @@ while [ $# -ne 0 ]; do
         run_custom_checks=0
         shift
     ;;
+    --neovim-02-only)
+        run_neovim_03_tests=0
+        run_vim_tests=0
+        run_vint=0
+        run_custom_checks=0
+        shift
+    ;;
+    --neovim-03-only)
+        run_neovim_02_tests=0
+        run_vim_tests=0
+        run_vint=0
+        run_custom_checks=0
+        shift
+    ;;
     --vim-only)
-        run_neovim_tests=0
+        run_neovim_02_tests=0
+        run_neovim_03_tests=0
         run_vint=0
         run_custom_checks=0
         shift
@@ -52,7 +73,8 @@ while [ $# -ne 0 ]; do
     ;;
     --vint-only)
         run_vim_tests=0
-        run_neovim_tests=0
+        run_neovim_02_tests=0
+        run_neovim_03_tests=0
         run_custom_checks=0
         shift
     ;;
@@ -62,7 +84,8 @@ while [ $# -ne 0 ]; do
     ;;
     --custom-checks-only)
         run_vim_tests=0
-        run_neovim_tests=0
+        run_neovim_02_tests=0
+        run_neovim_03_tests=0
         run_vint=0
         shift
     ;;
@@ -90,8 +113,7 @@ fi
 # Delete .swp files in the test directory, which cause Vim 8 to hang.
 find test -name '*.swp' -delete
 
-docker images -q w0rp/ale | grep "^$current_image_id" > /dev/null \
-    || docker pull "$image"
+docker pull "$image"@"$current_digest"
 
 output_dir=$(mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir')
 
@@ -100,8 +122,10 @@ trap '{ rm -rf "$output_dir"; }' EXIT
 file_number=0
 pid_list=''
 
-for vim in $(docker run --rm "$image" ls /vim-build/bin | grep '^neovim\|^vim' ); do
-    if ((run_vim_tests)) || [[ $vim =~ ^neovim ]] && ((run_neovim_tests)); then
+for vim in $(docker run --rm "$DOCKER_RUN_IMAGE" ls /vim-build/bin | grep '^neovim\|^vim' ); do
+    if ( [[ $vim =~ ^vim ]] && ((run_vim_tests)) ) \
+    || ( [[ $vim =~ ^neovim-v0.2 ]] && ((run_neovim_02_tests)) ) \
+    || ( [[ $vim =~ ^neovim-v0.3 ]] && ((run_neovim_03_tests)) ); then
         echo "Starting Vim: $vim..."
         file_number=$((file_number+1))
         test/script/run-vader-tests $quiet_flag $verbose_flag "$vim" "$tests" \
@@ -139,4 +163,10 @@ for pid in $pid_list; do
     cat "$output_dir/$index"
 done
 
+if ((failed)); then
+    echo 'Something went wrong!'
+else
+    echo 'All tests passed!'
+fi
+
 exit $failed
diff --git a/test/script/custom-checks b/test/script/custom-checks
index 76b9bc86..d4027fec 100755
--- a/test/script/custom-checks
+++ b/test/script/custom-checks
@@ -4,8 +4,7 @@ set -e
 set -u
 
 exit_code=0
-image=w0rp/ale
-docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$image")
+docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$DOCKER_RUN_IMAGE")
 
 echo '========================================'
 echo 'Running custom linting rules'
diff --git a/test/script/run-vader-tests b/test/script/run-vader-tests
index 3e7e815c..e952faf0 100755
--- a/test/script/run-vader-tests
+++ b/test/script/run-vader-tests
@@ -3,8 +3,7 @@
 set -e
 set -u
 
-image=w0rp/ale
-docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$image")
+docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$DOCKER_RUN_IMAGE")
 red='\033[0;31m'
 green='\033[0;32m'
 nc='\033[0m'
diff --git a/test/script/run-vint b/test/script/run-vint
index 0d5b6e11..ce42ad41 100755
--- a/test/script/run-vint
+++ b/test/script/run-vint
@@ -4,8 +4,7 @@ set -e
 set -u
 
 exit_code=0
-image=w0rp/ale
-docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$image")
+docker_flags=(--rm -v "$PWD:/testplugin" -v "$PWD/test:/home" -w /testplugin "$DOCKER_RUN_IMAGE")
 
 echo '========================================'
 echo 'Running Vint to lint our code'
diff --git a/test/sign/test_linting_sets_signs.vader b/test/sign/test_linting_sets_signs.vader
index c23b4002..2f9be7b2 100644
--- a/test/sign/test_linting_sets_signs.vader
+++ b/test/sign/test_linting_sets_signs.vader
@@ -44,6 +44,7 @@ After:
 
   sign unplace *
   let g:ale_buffer_info = {}
+  call ale#engine#Cleanup(bufnr(''))
   call ale#linter#Reset()
 
 Execute(The signs should be updated after linting is done):
diff --git a/test/sign/test_sign_placement.vader b/test/sign/test_sign_placement.vader
index 19267fe7..e2d95ff0 100644
--- a/test/sign/test_sign_placement.vader
+++ b/test/sign/test_sign_placement.vader
@@ -1,9 +1,20 @@
 Before:
-  Save g:ale_set_signs
   Save g:ale_buffer_info
+  Save g:ale_echo_cursor
+  Save g:ale_run_synchronously
+  Save g:ale_set_highlights
+  Save g:ale_set_loclist
+  Save g:ale_set_quickfix
+  Save g:ale_set_signs
 
-  let g:ale_set_signs = 1
   let g:ale_buffer_info = {}
+  let g:ale_run_synchronously = 1
+  let g:ale_set_signs = 1
+  " Disable features we don't need for these tests.
+  let g:ale_set_quickfix = 0
+  let g:ale_set_loclist = 0
+  let g:ale_set_highlights = 0
+  let g:ale_echo_cursor = 0
 
   call ale#linter#Reset()
   sign unplace *
@@ -122,8 +133,7 @@ Given testft(A file with warnings/errors):
   fifth line
 
 Execute(The current signs should be set for running a job):
-  call ale#Lint()
-  call ale#engine#WaitForJobs(2000)
+  ALELint
 
   AssertEqual
   \ [
diff --git a/test/smoke_test.vader b/test/smoke_test.vader
index 843bddab..7f9dfd03 100644
--- a/test/smoke_test.vader
+++ b/test/smoke_test.vader
@@ -35,6 +35,7 @@ After:
 
   delfunction TestCallback
   delfunction TestCallback2
+  call ale#engine#Cleanup(bufnr(''))
   call ale#linter#Reset()
 
 Given foobar (Some imaginary filetype):
diff --git a/test/test_ale_lint_command.vader b/test/test_ale_lint_command.vader
index 7b4f7613..15f1f054 100644
--- a/test/test_ale_lint_command.vader
+++ b/test/test_ale_lint_command.vader
@@ -39,9 +39,11 @@ After:
 
   unlet! g:expected_loclist
 
-  let g:ale_buffer_info = {}
+  call ale#engine#Cleanup(bufnr(''))
   call ale#linter#Reset()
 
+  let g:ale_buffer_info = {}
+
   delfunction ToggleTestCallback
 
 Given foobar (Some imaginary filetype):
diff --git a/test/test_ale_toggle.vader b/test/test_ale_toggle.vader
index cac762b4..3b3c509c 100644
--- a/test/test_ale_toggle.vader
+++ b/test/test_ale_toggle.vader
@@ -110,13 +110,9 @@ Given foobar (Some imaginary filetype):
   baz
 
 Execute(ALEToggle should reset everything and then run again):
-  " Run this test asynchrously.
-  let g:ale_run_synchronously = 0
-
   AssertEqual 'foobar', &filetype
 
-  call ale#Lint()
-  call ale#engine#WaitForJobs(2000)
+  ALELint
 
   " First check that everything is there...
   AssertEqual g:expected_loclist, getloclist(0)
@@ -139,7 +135,6 @@ Execute(ALEToggle should reset everything and then run again):
 
   " Toggle ALE on, everything should be set up and run again.
   ALEToggle
-  call ale#engine#WaitForJobs(2000)
 
   AssertEqual g:expected_loclist, getloclist(0)
   AssertEqual [0, [[2, 1000001, 'ALEErrorSign']]], ale#sign#FindCurrentSigns(bufnr('%'))
@@ -150,9 +145,6 @@ Execute(ALEToggle should reset everything and then run again):
   AssertEqual [{'lnum': 2, 'bufnr': bufnr(''), 'col': 3, 'linter_name': 'testlinter', 'vcol': 0, 'nr': -1, 'type': 'E', 'text': 'foo bar', 'sign_id': 1000001}], g:ale_buffer_info[bufnr('')].loclist
 
 Execute(ALEToggle should skip filename keys and preserve them):
-  " Run this test asynchrously.
-  let g:ale_run_synchronously = 0
-
   AssertEqual 'foobar', &filetype
 
   let g:ale_buffer_info['/foo/bar/baz.txt'] = {
@@ -164,8 +156,7 @@ Execute(ALEToggle should skip filename keys and preserve them):
   \ 'history': [],
   \}
 
-  call ale#Lint()
-  call ale#engine#WaitForJobs(2000)
+  ALELint
 
   " Now Toggle ALE off.
   ALEToggle
@@ -183,7 +174,6 @@ Execute(ALEToggle should skip filename keys and preserve them):
 
   " Toggle ALE on again.
   ALEToggle
-  call ale#engine#WaitForJobs(2000)
 
   AssertEqual
   \ {
@@ -197,7 +187,7 @@ Execute(ALEToggle should skip filename keys and preserve them):
   \ get(g:ale_buffer_info, '/foo/bar/baz.txt', {})
 
 Execute(ALEDisable should reset everything and stay disabled):
-  call ale#Lint()
+  ALELint
 
   AssertEqual g:expected_loclist, getloclist(0)
 
@@ -222,7 +212,7 @@ Execute(ALEEnable should enable ALE and lint again):
 Execute(ALEReset should reset everything for a buffer):
   AssertEqual 'foobar', &filetype
 
-  call ale#Lint()
+  ALELint
 
   " First check that everything is there...
   AssertEqual g:expected_loclist, getloclist(0)
@@ -244,13 +234,9 @@ Execute(ALEReset should reset everything for a buffer):
   AssertEqual 1, g:ale_enabled
 
 Execute(ALEToggleBuffer should reset everything and then run again):
-  " Run this test asynchrously.
-  let g:ale_run_synchronously = 0
-
   AssertEqual 'foobar', &filetype
 
-  call ale#Lint()
-  call ale#engine#WaitForJobs(2000)
+  ALELint
 
   " First check that everything is there...
   AssertEqual g:expected_loclist, getloclist(0)
@@ -271,7 +257,6 @@ Execute(ALEToggleBuffer should reset everything and then run again):
 
   " Toggle ALE on, everything should be set up and run again.
   ALEToggleBuffer
-  call ale#engine#WaitForJobs(2000)
 
   AssertEqual g:expected_loclist, getloclist(0)
   AssertEqual [0, [[2, 1000001, 'ALEErrorSign']]], ale#sign#FindCurrentSigns(bufnr('%'))
@@ -282,7 +267,7 @@ Execute(ALEToggleBuffer should reset everything and then run again):
   AssertEqual [{'lnum': 2, 'bufnr': bufnr(''), 'col': 3, 'linter_name': 'testlinter', 'vcol': 0, 'nr': -1, 'type': 'E', 'text': 'foo bar', 'sign_id': 1000001}], g:ale_buffer_info[bufnr('')].loclist
 
 Execute(ALEDisableBuffer should reset everything and stay disabled):
-  call ale#Lint()
+  ALELint
 
   AssertEqual g:expected_loclist, getloclist(0)
 
@@ -317,7 +302,7 @@ Execute(ALEEnableBuffer should complain when ALE is disabled globally):
 Execute(ALEResetBuffer should reset everything for a buffer):
   AssertEqual 'foobar', &filetype
 
-  call ale#Lint()
+  ALELint
 
   " First check that everything is there...
   AssertEqual g:expected_loclist, getloclist(0)
diff --git a/test/test_format_temporary_file_creation.vader b/test/test_format_temporary_file_creation.vader
index 1afaba30..fc43e2a1 100644
--- a/test/test_format_temporary_file_creation.vader
+++ b/test/test_format_temporary_file_creation.vader
@@ -17,6 +17,8 @@ Before:
 After:
   unlet! g:output
   delfunction TestCallback
+
+  call ale#engine#Cleanup(bufnr(''))
   call ale#linter#Reset()
 
 Given foobar (Some imaginary filetype):
diff --git a/test/test_history_saving.vader b/test/test_history_saving.vader
index 7dabcd9d..8764b74c 100644
--- a/test/test_history_saving.vader
+++ b/test/test_history_saving.vader
@@ -52,9 +52,12 @@ After:
   let g:ale_history_enabled = 1
   let g:ale_history_log_output = 0
   unlet g:history
+
+  call ale#engine#Cleanup(bufnr(''))
+  call ale#linter#Reset()
+
   let g:ale_buffer_info = {}
   let g:ale_max_buffer_history_size = 20
-  call ale#linter#Reset()
   delfunction TestFixer
   delfunction CollectResults
 
diff --git a/test/test_lint_file_linters.vader b/test/test_lint_file_linters.vader
index 2e992e13..14339e21 100644
--- a/test/test_lint_file_linters.vader
+++ b/test/test_lint_file_linters.vader
@@ -85,7 +85,7 @@ Before:
 
 After:
   if !g:ale_run_synchronously
-    call ale#engine#WaitForJobs(2000)
+    call ale#engine#Cleanup(bufnr(''))
   endif
 
   Restore
diff --git a/test/test_linting_blacklist.vader b/test/test_linting_blacklist.vader
index 9960264d..2d9ed585 100644
--- a/test/test_linting_blacklist.vader
+++ b/test/test_linting_blacklist.vader
@@ -2,6 +2,8 @@ Before:
   let g:ale_buffer_info = {}
 
 After:
+  call ale#engine#Cleanup(bufnr(''))
+
   let g:ale_buffer_info = {}
 
 Given unite (A Unite.vim file):
diff --git a/test/test_linting_updates_loclist.vader b/test/test_linting_updates_loclist.vader
index 29ca05d4..921cdb08 100644
--- a/test/test_linting_updates_loclist.vader
+++ b/test/test_linting_updates_loclist.vader
@@ -1,31 +1,24 @@
 Before:
+  Save g:ale_echo_cursor
+  Save g:ale_set_highlights
+  Save g:ale_set_loclist
+  Save g:ale_set_quickfix
   Save g:ale_set_signs
-  let g:ale_set_signs = 1
+  Save g:ale_run_synchronously
+  Save g:ale_set_lists_synchronously
+  Save g:ale_buffer_info
 
-  let g:expected_data = [
-  \ {
-  \   'lnum': 1,
-  \   'bufnr': bufnr('%'),
-  \   'vcol': 0,
-  \   'linter_name': 'testlinter',
-  \   'nr': -1,
-  \   'type': 'W',
-  \   'col': 10,
-  \   'text': 'Infix operators must be spaced. [Warning/space-infix-ops]',
-  \   'sign_id': 1000001,
-  \ },
-  \ {
-  \   'lnum': 2,
-  \   'bufnr': bufnr('%'),
-  \   'vcol': 0,
-  \   'linter_name': 'testlinter',
-  \   'nr': -1,
-  \   'type': 'E',
-  \   'col': 10,
-  \   'text': 'Missing semicolon. [Error/semi]',
-  \   'sign_id': 1000002,
-  \ }
-  \]
+  " We want to check that sign IDs are set for this test.
+  let g:ale_set_signs = 1
+  let g:ale_set_loclist = 1
+  " Disable features we don't need for these tests.
+  let g:ale_set_quickfix = 0
+  let g:ale_set_highlights = 0
+  let g:ale_echo_cursor = 0
+
+  let g:ale_run_synchronously = 1
+  let g:ale_set_lists_synchronously = 1
+  let g:ale_buffer_info = {}
 
   function! TestCallback(buffer, output)
     return [
@@ -54,22 +47,47 @@ Before:
 
   sign unplace *
 
+  call ale#engine#Cleanup(bufnr(''))
+
 After:
   Restore
 
   delfunction TestCallback
 
-  unlet! g:expected_data
-  let g:ale_buffer_info = {}
   call ale#linter#Reset()
 
+  sign unplace *
+
 Given foobar (Some JavaScript with problems):
   var y = 3+3;
   var y = 3
 
 Execute(The loclist should be updated after linting is done):
-  call ale#Lint()
-  call ale#engine#WaitForJobs(2000)
+  ALELint
 
-  AssertEqual ['' . bufnr('%')], keys(g:ale_buffer_info)
-  AssertEqual g:expected_data, g:ale_buffer_info[bufnr('%')].loclist
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 1,
+  \     'bufnr': bufnr('%'),
+  \     'vcol': 0,
+  \     'linter_name': 'testlinter',
+  \     'nr': -1,
+  \     'type': 'W',
+  \     'col': 10,
+  \     'text': 'Infix operators must be spaced. [Warning/space-infix-ops]',
+  \     'sign_id': 1000001,
+  \   },
+  \   {
+  \     'lnum': 2,
+  \     'bufnr': bufnr('%'),
+  \     'vcol': 0,
+  \     'linter_name': 'testlinter',
+  \     'nr': -1,
+  \     'type': 'E',
+  \     'col': 10,
+  \     'text': 'Missing semicolon. [Error/semi]',
+  \     'sign_id': 1000002,
+  \   }
+  \ ],
+  \ get(get(g:ale_buffer_info, bufnr('%'), {}), 'loclist', [])