diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..4510efb
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,15 @@
+name: test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Vim and Neovim
+        run: sudo apt-get update && sudo apt-get install -y vim neovim
+      - name: Run tests
+        run: ./test/run.sh
diff --git a/.gitignore b/.gitignore
index 6e9b2ec..4d4d57c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 README.html
 test.vue
 .DS_STORE
+test/deps/
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index e8679a7..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-dist: focal
-
-language: minimal
-  
-before_install:
-  - sudo add-apt-repository ppa:neovim-ppa/stable -y
-  - sudo apt-get update
-  - sudo apt-get -y install neovim
-
-install:
-  - git clone https://github.com/leafOfTree/test ../test --depth=1 
-
-  - git clone https://github.com/digitaltoad/vim-pug ../vim-pug --depth=1
-  - git clone https://github.com/kchmck/vim-coffee-script ../vim-coffee-script --depth=1
-  - git clone https://github.com/leafgarland/typescript-vim ../typescript-vim --depth=1
-  - git clone https://github.com/iloginow/vim-stylus.git ../vim-stylus --depth=1
-
-script:
-  - bash ../test/start.sh vue vim-vue-plugin
diff --git a/README.md b/README.md
index 6996da7..f8b9ced 100644
--- a/README.md
+++ b/README.md
@@ -208,6 +208,17 @@ For example, the built-in syntax `sass.vim` and `less.vim` in vim8.1 runtime and
 + endif
 ```
 
+## Tests
+
+Run tests with Vim and Neovim, whichever is installed
+
+```sh
+./test/run.sh
+./test/run.sh basic template  # Only these cases
+```
+
+Each case is a `.vue` file in [test/cases](test/cases), with an optional `.vim` file for the config and syntax checks. A case fails if indenting the whole file changes it, a check fails, or there is an error message. Tests also run on GitHub Actions for each push and pull request.
+
 ## Acknowledgments & Refs
 
 - [mxw/vim-jsx][1]
diff --git a/test/cases/basic.vim b/test/cases/basic.vim
new file mode 100644
index 0000000..eb117a9
--- /dev/null
+++ b/test/cases/basic.vim
@@ -0,0 +1,7 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'script': ['javascript'],
+      \   'template': ['html'],
+      \   'style': ['css'],
+      \},
+      \}
diff --git a/test/cases/basic.vue b/test/cases/basic.vue
new file mode 100644
index 0000000..1f7d4bc
--- /dev/null
+++ b/test/cases/basic.vue
@@ -0,0 +1,20 @@
+<template>
+  <p>{{ greeting }}</p>
+</template>
+
+<script>
+export default {
+  data: function () {
+    return {
+      greeting: 'Hello'
+    };
+  },
+};
+</script>
+
+<style scoped>
+p {
+  font-size: 2em;
+  text-align: center;
+}
+</style>
diff --git a/test/cases/example.vim b/test/cases/example.vim
new file mode 100644
index 0000000..530800c
--- /dev/null
+++ b/test/cases/example.vim
@@ -0,0 +1,15 @@
+" Uses syntax plugins in test/deps
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html', 'pug'],
+      \   'script': ['javascript', 'typescript', 'coffee'],
+      \   'style': ['css', 'scss', 'sass', 'less', 'stylus'],
+      \   'docs': 'markdown',
+      \   'i18n': ['json', 'yaml'],
+      \   'route': 'json',
+      \},
+      \'attribute': 1,
+      \'keyword': 1,
+      \'foldexpr': 1,
+      \'full_syntax': ['scss', 'less'],
+      \}
diff --git a/test/cases/example.vue b/test/cases/example.vue
new file mode 100644
index 0000000..fce9e3e
--- /dev/null
+++ b/test/cases/example.vue
@@ -0,0 +1,160 @@
+<template lang="pug">
+  div.set
+    span(id="123")
+</template>
+
+<template>
+  <template></template>
+  <div></div>
+</template>
+
+<template>
+  <p>{{ greeting }}</p>
+</template>
+
+<script>
+export default {
+  data: function () {
+    return {
+      greeting: 'Hello'
+    };
+  },
+};
+</script>
+
+<script lang="ts">
+import Vue from 'vue'
+import { User } from '@/types'
+
+export default Vue.extend({
+  name: 'Home' as string,
+  data() {
+    return {
+      user: {} as User
+    }
+  },
+  computed: {
+    fullName(): string { // Computed Property returns a string
+      return `${this.user.firstName} ${this.user.lastName}`
+    }
+  },
+  mounted(): void { // The mounted hook returns nothing
+    ...
+  }
+})
+</script>
+
+<script lang="coffee">
+# Assignment:
+number   = 42
+opposite = true
+
+# Conditions:
+number = -42 if opposite
+
+# Functions:
+square = (x) -> x * x
+
+# Arrays:
+list = [1, 2, 3, 4, 5]
+
+`
+function hello() {}
+console.log
+a = 123;
+`
+# Objects:
+math =
+  root:   Math.sqrt
+square: square
+cube:   (x) -> x * square x
+
+# Splats:
+race = (winner, runners...) ->
+print winner, runners
+
+# Existence:
+alert "I knew it!" if elvis?
+
+# Array comprehensions:
+cubes = (math.cube num for num in list)
+
+</script>
+
+<style scoped>
+p {
+  font-size: 2em;
+  text-align: center;
+}
+</style>
+
+<style scoped lang="scss">
+$a: 100px;
+
+div {
+  background: white;
+}
+</style>
+
+<style lang="sass">
+$w: 128px;
+
+.bg
+  $w: 128px;
+    background: white;
+  align-items: center;
+
+canvas
+  width: 100vw;
+</style>
+
+<style lang="less">
+@list: 10 12;
+canvas {
+  background: white;
+  width: 100vh;
+}
+</style>
+
+<style lang="stylus">
+@import 'vendor'
+
+body
+  font: 12px Helvetica, Arial, sans-serif
+
+  a.button
+    border-radius: 5px
+</style>
+
+<route>
+{
+  "name": "home",
+  "meta": {
+    "requiresAuth": true
+  }
+}
+</route>
+
+<docs>
+# This is the documentation for component.
+</docs>
+
+<i18n lang="yaml">
+en:
+  hello: "Hello World!"
+ja:
+  hello: "こんにちは、世界！"
+</i18n>
+
+<i18n>
+{
+  "en": {
+    "language": "Language",
+    "hello": "hello, world!"
+  },
+  "ja": {
+    "language": "言語",
+    "hello": "こんにちは、世界！"
+  }
+}
+</i18n>
diff --git a/test/cases/fold.vim b/test/cases/fold.vim
new file mode 100644
index 0000000..2ba1f62
--- /dev/null
+++ b/test/cases/fold.vim
@@ -0,0 +1,15 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'script': ['javascript'],
+      \   'template': ['html'],
+      \   'style': ['css'],
+      \},
+      \'foldexpr': 1,
+      \}
+
+function! Check()
+  let levels = [1, 2, 1, 1, 1, 2, 3, 4, 4, 3, 3, 1, 1, 1, 1, 1, 2, 2, 1, 1]
+  for lnum in range(1, len(levels))
+    call ExpectFoldlevel(lnum, levels[lnum - 1])
+  endfor
+endfunction
diff --git a/test/cases/fold.vue b/test/cases/fold.vue
new file mode 100644
index 0000000..1f7d4bc
--- /dev/null
+++ b/test/cases/fold.vue
@@ -0,0 +1,20 @@
+<template>
+  <p>{{ greeting }}</p>
+</template>
+
+<script>
+export default {
+  data: function () {
+    return {
+      greeting: 'Hello'
+    };
+  },
+};
+</script>
+
+<style scoped>
+p {
+  font-size: 2em;
+  text-align: center;
+}
+</style>
diff --git a/test/cases/indent.vim b/test/cases/indent.vim
new file mode 100644
index 0000000..a23b534
--- /dev/null
+++ b/test/cases/indent.vim
@@ -0,0 +1,9 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html'],
+      \   'script': ['javascript'],
+      \   'style': ['css', 'sass', 'scss'],
+      \   'codepen-additional': ['javascript', 'json'],
+      \},
+      \'initial_indent': ['script', 'style', 'codepen-additional'],
+      \}
diff --git a/test/cases/indent.vue b/test/cases/indent.vue
new file mode 100644
index 0000000..52a4b8e
--- /dev/null
+++ b/test/cases/indent.vue
@@ -0,0 +1,27 @@
+<template>
+  <p>{{ greeting }}</p>
+</template>
+
+<script>
+  export default {
+    data: function () {
+      return {
+        greeting: 'Hello'
+      };
+    },
+  };
+</script>
+
+<style scoped lang="scss">
+  p {
+    font-size: 2em;
+    text-align: center;
+  }
+</style>
+
+<codepen-additional>
+  const easings = {
+    linear: '',
+    easeInQuad: '',
+  }
+</codepen-additional>
diff --git a/test/cases/keyword.vim b/test/cases/keyword.vim
new file mode 100644
index 0000000..1300e7a
--- /dev/null
+++ b/test/cases/keyword.vim
@@ -0,0 +1,16 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html'],
+      \   'script': ['javascript', 'typescript'],
+      \},
+      \'keyword': 1,
+      \'initial_indent': ['script', 'style', 'codepen-additional'],
+      \}
+
+function! Check()
+  call ExpectSyntax('name', 'vueObjectKey')
+  call ExpectSyntax('data', 'vueObjectFuncKey')
+  call ExpectSyntax('data', 'vueObjectFuncName')
+  call ExpectSyntax('computed', 'vueObjectKey')
+  call ExpectSyntax('mounted', 'vueObjectFuncName')
+endfunction
diff --git a/test/cases/keyword.vue b/test/cases/keyword.vue
new file mode 100644
index 0000000..992725b
--- /dev/null
+++ b/test/cases/keyword.vue
@@ -0,0 +1,45 @@
+<script>
+  export default {
+    name: 'Home' as string,
+    data: function () {
+      return {
+        greeting: 'Hello'
+      };
+    },
+    data() {
+      return {
+        greeting: 'Hello'
+      };
+    },
+    computed: {
+      fullName() { // Computed Property returns a string
+        return `${this.user.firstName} ${this.user.lastName}`
+      }
+    },
+    mounted() { // The mounted hook returns nothing
+      ...
+    }
+  };
+</script>
+
+<script lang="ts">
+  import Vue from 'vue'
+  import { User } from '@/types'
+
+  export default Vue.extend({
+    name: 'Home' as string,
+    data() {
+      return {
+        user: {} as User
+      }
+    },
+    computed: {
+      fullName(): string { // Computed Property returns a string
+        return `${this.user.firstName} ${this.user.lastName}`
+      }
+    },
+    mounted(): void { // The mounted hook returns nothing
+      ...
+    }
+  })
+</script>
diff --git a/test/cases/oneline.vim b/test/cases/oneline.vim
new file mode 100644
index 0000000..7ac3f54
--- /dev/null
+++ b/test/cases/oneline.vim
@@ -0,0 +1,22 @@
+" One-line blocks like <style>p { color: red; }</style>
+
+function! Check()
+  call ExpectSyntax('script', 'javascriptScriptBlock')
+  call ExpectSyntax('p {', 'cssStyleBlock')
+  call ExpectSyntax('color', 'cssTextProp')
+  call ExpectSyntax('p {', 'cssStyleBlock')
+  call ExpectSyntax('color', 'cssTextProp')
+  call ExpectSyntax('Hello', 'htmlTemplateBlock')
+  call CheckSync()
+endfunction
+
+" Syntax from a sync point, as after jumping to a line not displayed yet
+function! CheckSync()
+  silent edit!
+  call cursor(line('$'), 1)
+  call search('Hello', 'cW')
+  if index(SyntaxList(), 'htmlTemplateBlock') == -1
+    call Fail('after syncing, Hello should be htmlTemplateBlock, but got '
+          \.string(SyntaxList()))
+  endif
+endfunction
diff --git a/test/cases/oneline.vue b/test/cases/oneline.vue
new file mode 100644
index 0000000..d8db5f4
--- /dev/null
+++ b/test/cases/oneline.vue
@@ -0,0 +1,12 @@
+<script src="./tmp"> </script>
+
+<style lang="css">
+p {
+  color: red;
+}
+</style>
+
+
+<style>p { color: red; }</style>
+
+<template><div>Hello</div></template>
diff --git a/test/cases/random.vim b/test/cases/random.vim
new file mode 100644
index 0000000..3df54f4
--- /dev/null
+++ b/test/cases/random.vim
@@ -0,0 +1,10 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html'],
+      \   'script': ['javascript'],
+      \   'style': [],
+      \},
+      \'attribute': 1,
+      \'keyword': 1,
+      \'foldexpr': 1,
+      \}
diff --git a/test/cases/random.vue b/test/cases/random.vue
new file mode 100644
index 0000000..45b12b2
--- /dev/null
+++ b/test/cases/random.vue
@@ -0,0 +1,151 @@
+<template>
+  <div class="editor-page">
+    <div class="container page">
+      <div class="row">
+        <div class="col-md-10 offset-md-1 col-xs-12">
+          <RwvListErrors :errors="errors" />
+          <form @submit.prevent="onPublish(article.slug)">
+            <fieldset :disabled="inProgress">
+              <fieldset class="form-group">
+                <input
+                  type="text"
+                  class="form-control form-control-lg"
+                  v-model="article.title"
+                  placeholder="Article Title"
+                />
+              </fieldset>
+              <fieldset class="form-group">
+                <input
+                  type="text"
+                  class="form-control"
+                  v-model="article.description"
+                  placeholder="What's this article about?"
+                />
+              </fieldset>
+              <fieldset class="form-group">
+                <textarea
+                  class="form-control"
+                  rows="8"
+                  v-model="article.body"
+                  placeholder="Write your article (in markdown)"
+                >
+                </textarea>
+              </fieldset>
+              <fieldset class="form-group">
+                <input
+                  type="text"
+                  class="form-control"
+                  placeholder="Enter tags"
+                  v-model="tagInput"
+                  @keypress.enter.prevent="addTag(tagInput)"
+                />
+                <div class="tag-list">
+                  <span
+                    class="tag-default tag-pill"
+                    v-for="(tag, index) of article.tagList"
+                    :key="tag + index"
+                  >
+                    <i class="ion-close-round" @click="removeTag(tag)"> </i>
+                    {{ tag }}
+                  </span>
+                </div>
+              </fieldset>
+            </fieldset>
+            <button
+              :disabled="inProgress"
+              class="btn btn-lg pull-xs-right btn-primary"
+              type="submit"
+            >
+              Publish Article
+            </button>
+          </form>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+import { mapGetters } from "vuex";
+import store from "@/store";
+import RwvListErrors from "@/components/ListErrors";
+import {
+  ARTICLE_PUBLISH,
+  ARTICLE_EDIT,
+  FETCH_ARTICLE,
+  ARTICLE_EDIT_ADD_TAG,
+  ARTICLE_EDIT_REMOVE_TAG,
+  ARTICLE_RESET_STATE
+} from "@/store/actions.type";
+
+export default {
+  name: "RwvArticleEdit",
+  components: { RwvListErrors },
+  props: {
+    previousArticle: {
+      type: Object,
+      required: false
+    }
+  },
+  async beforeRouteUpdate(to, from, next) {
+    // Reset state if user goes from /editor/:id to /editor
+    // The component is not recreated so we use to hook to reset the state.
+    await store.dispatch(ARTICLE_RESET_STATE);
+    return next();
+  },
+  async beforeRouteEnter(to, from, next) {
+    // SO: https://github.com/vuejs/vue-router/issues/1034
+    // If we arrive directly to this url, we need to fetch the article
+    await store.dispatch(ARTICLE_RESET_STATE);
+    if (to.params.slug !== undefined) {
+      await store.dispatch(
+        FETCH_ARTICLE,
+        to.params.slug,
+        to.params.previousArticle
+      );
+    }
+    return next();
+  },
+  async beforeRouteLeave(to, from, next) {
+    await store.dispatch(ARTICLE_RESET_STATE);
+    next();
+  },
+  data() {
+    return {
+      tagInput: null,
+      inProgress: false,
+      errors: {}
+    };
+  },
+  computed: {
+    ...mapGetters(["article"])
+  },
+  methods: {
+    onPublish(slug) {
+      let action = slug ? ARTICLE_EDIT : ARTICLE_PUBLISH;
+      this.inProgress = true;
+      this.$store
+        .dispatch(action)
+        .then(({ data }) => {
+          this.inProgress = false;
+          this.$router.push({
+            name: "article",
+            params: { slug: data.article.slug }
+          });
+        })
+        .catch(({ response }) => {
+          this.inProgress = false;
+          this.errors = response.data.errors;
+        });
+    },
+    removeTag(tag) {
+      this.$store.dispatch(ARTICLE_EDIT_REMOVE_TAG, tag);
+    },
+    addTag(tag) {
+      this.$store.dispatch(ARTICLE_EDIT_ADD_TAG, tag);
+      this.tagInput = null;
+    }
+  }
+};
+</script>
+
diff --git a/test/cases/script-setup.vim b/test/cases/script-setup.vim
new file mode 100644
index 0000000..cb8c7d9
--- /dev/null
+++ b/test/cases/script-setup.vim
@@ -0,0 +1,18 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html'],
+      \   'script': ['javascript', 'typescript'],
+      \},
+      \'keyword': 1,
+      \}
+
+function! Check()
+  call ExpectSyntax('withDefaults', 'vue3Keyword')
+  call ExpectSyntax('defineProps<', 'vue3Keyword')
+  call ExpectSyntax('defineEmits<', 'vue3Keyword')
+  call ExpectSyntax('defineModel<', 'vue3Keyword')
+  call ExpectSyntax('useTemplateRef', 'vue3Keyword')
+  call ExpectSyntax('ref<number>', 'vue3Keyword')
+  call ExpectNoSyntax('value < 3', 'vue3Keyword')
+  call ExpectSyntax('defineExpose', 'vue3Keyword')
+endfunction
diff --git a/test/cases/script-setup.vue b/test/cases/script-setup.vue
new file mode 100644
index 0000000..d64cd51
--- /dev/null
+++ b/test/cases/script-setup.vue
@@ -0,0 +1,15 @@
+<template>
+  <div ref="el">{{ props.foo }}</div>
+</template>
+
+<script setup lang="ts">
+const props = withDefaults(defineProps<{ foo?: string }>(), {
+  foo: 'a',
+})
+const emit = defineEmits<{ (e: 'change', id: number): void }>()
+const model = defineModel<string>()
+const el = useTemplateRef('el')
+const count = ref<number>(1)
+const small = count.value < 3
+defineExpose({ el })
+</script>
diff --git a/test/cases/template.vim b/test/cases/template.vim
new file mode 100644
index 0000000..bcaceb8
--- /dev/null
+++ b/test/cases/template.vim
@@ -0,0 +1,18 @@
+" Nested <template> and <docs> in <template>
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'script': ['javascript'],
+      \   'template': ['html'],
+      \   'style': ['css'],
+      \   'docs': 'markdown',
+      \},
+      \}
+
+function! Check()
+  while search('/template', 'W')
+    call ExpectTag(line('.'), 'template')
+  endwhile
+  normal! gg
+  call ExpectNoSyntax('/docs', 'markdownDocsBlock')
+  call ExpectSyntax('/docs', 'markdownDocsBlock')
+endfunction
diff --git a/test/cases/template.vue b/test/cases/template.vue
new file mode 100644
index 0000000..3eeb8e5
--- /dev/null
+++ b/test/cases/template.vue
@@ -0,0 +1,23 @@
+<template>
+  <template>
+    <div></div>
+  </template>
+
+  <div></div>
+  <template>
+    <div></div>
+  </template>
+  <div></div>
+  <docs></docs>
+  <div></div>
+
+</template>
+
+<template>
+  <template></template>
+  <div></div>
+</template>
+
+<docs>
+# Hello
+</docs>
diff --git a/test/cases/vue3.vim b/test/cases/vue3.vim
new file mode 100644
index 0000000..533d2d4
--- /dev/null
+++ b/test/cases/vue3.vim
@@ -0,0 +1,15 @@
+let g:vim_vue_plugin_config = {
+      \'syntax': {
+      \   'template': ['html'],
+      \   'script': ['javascript', 'typescript'],
+      \   'style': ['css'],
+      \},
+      \'keyword': 1,
+      \}
+
+function! Check()
+  call ExpectSyntax('v-bind', 'cssFunctionName')
+  call ExpectSyntax('slotted', 'cssPseudoClassId')
+  call ExpectSyntax('global', 'cssPseudoClassId')
+  call ExpectSyntax('deep', 'cssPseudoClassId')
+endfunction
diff --git a/test/cases/vue3.vue b/test/cases/vue3.vue
new file mode 100644
index 0000000..c323eb2
--- /dev/null
+++ b/test/cases/vue3.vue
@@ -0,0 +1,8 @@
+<style scoped>
+button {
+  color: v-bind(color);
+}
+.a :slotted(.b) :global(.c) :deep(.d) {
+  /* ... */
+}
+</style>
diff --git a/test/run.sh b/test/run.sh
new file mode 100755
index 0000000..7c13272
--- /dev/null
+++ b/test/run.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+# Run all test cases, or the ones given as arguments, with vim and nvim if
+# they are installed. Vim runs in a pseudo terminal by `script`, as syntax
+# in Ex mode (-es) isn't the same as in a terminal.
+#   ./test/run.sh
+#   ./test/run.sh basic template
+cd "$(dirname "$0")/.." || exit 1
+
+# Syntax plugins used by test/cases/example.vue
+mkdir -p test/deps
+for repo in digitaltoad/vim-pug kchmck/vim-coffee-script \
+  leafgarland/typescript-vim iloginow/vim-stylus; do
+  dir=test/deps/${repo#*/}
+  [ -d "$dir" ] || git clone -q --depth 1 "https://github.com/$repo" "$dir"
+done
+
+if [ $# -gt 0 ]; then
+  cases=$*
+else
+  cases=$(ls test/cases/*.vue | sed 's#.*/##; s#\.vue$##')
+fi
+
+out=$(mktemp)
+status=0
+expected=0
+for name in $cases; do
+  if command -v vim >/dev/null; then
+    expected=$((expected + 1))
+    VUE_TEST_CASE=$name VUE_TEST_OUT=$out timeout 60 script -qec \
+      'stty rows 40 cols 120; vim -N -u NONE -i NONE -S test/run.vim' \
+      /dev/null >/dev/null || status=1
+  fi
+  if command -v nvim >/dev/null; then
+    expected=$((expected + 1))
+    VUE_TEST_CASE=$name VUE_TEST_OUT=$out timeout 60 \
+      nvim --headless -u NONE -i NONE -S test/run.vim || status=1
+  fi
+done
+
+cat "$out"
+passed=$(grep -c '^ok' "$out")
+failed=$(grep -c '^FAIL' "$out")
+missing=$((expected - passed - failed))
+echo "$passed passed, $failed failed, $missing without result"
+[ $failed -eq 0 ] && [ $missing -eq 0 ] || status=1
+rm -f "$out"
+exit $status
diff --git a/test/run.vim b/test/run.vim
new file mode 100644
index 0000000..01ab223
--- /dev/null
+++ b/test/run.vim
@@ -0,0 +1,117 @@
+" Run one test case, see test/run.sh
+"   VUE_TEST_CASE=basic vim -N -u NONE -i NONE -S test/run.vim
+"
+" A case is test/cases/<name>.vue, with optional test/cases/<name>.vim to set
+" g:vim_vue_plugin_config and define Check() for more assertions. It fails if
+" - indenting the whole file changes it
+" - Check() calls Fail() or an Expect*() function fails
+" - there are error messages
+"
+" Results are appended to $VUE_TEST_OUT. Exit code is 1 if the case fails.
+
+set nocompatible
+let s:root = expand('<sfile>:p:h:h')
+let s:name = $VUE_TEST_CASE
+let s:case = s:root.'/test/cases/'.s:name
+let s:errors = []
+
+" Plugin first, before Vim's placeholder vue syntax and indent files
+let &runtimepath = join([s:root, s:root.'/test/runtime']
+      \ + glob(s:root.'/test/deps/*', 0, 1)
+      \ + [&runtimepath], ',')
+set expandtab shiftwidth=2
+" Plugin scripts aren't loaded with -u NONE, e.g. vim-stylus sets g:css_units
+runtime! plugin/**/*.vim
+
+" Helpers for Check()
+function! Fail(msg)
+  call add(s:errors, a:msg)
+endfunction
+
+function! SyntaxList()
+  return map(synstack(line('.'), col('.')), { _, id -> synIDattr(id, 'name') })
+endfunction
+
+" Search pattern forward from cursor and check syntax at the match
+function! ExpectSyntax(pattern, syntax)
+  if !search('\V'.a:pattern, 'W')
+    return Fail('not found: '.a:pattern)
+  endif
+  if index(SyntaxList(), a:syntax) == -1
+    call Fail(printf('%s at line %d should be %s, but got %s',
+          \ a:pattern, line('.'), a:syntax, string(SyntaxList())))
+  endif
+endfunction
+
+function! ExpectNoSyntax(pattern, syntax)
+  if !search('\V'.a:pattern, 'W')
+    return Fail('not found: '.a:pattern)
+  endif
+  if index(SyntaxList(), a:syntax) != -1
+    call Fail(printf('%s at line %d should not be %s, but got %s',
+          \ a:pattern, line('.'), a:syntax, string(SyntaxList())))
+  endif
+endfunction
+
+function! ExpectFoldlevel(lnum, level)
+  if foldlevel(a:lnum) != a:level
+    call Fail(printf('foldlevel at line %d should be %d, but got %d',
+          \ a:lnum, a:level, foldlevel(a:lnum)))
+  endif
+endfunction
+
+function! ExpectTag(lnum, tag)
+  if GetVueTag(a:lnum) !=# a:tag
+    call Fail(printf('tag at line %d should be %s, but got %s',
+          \ a:lnum, string(a:tag), string(GetVueTag(a:lnum))))
+  endif
+endfunction
+
+if filereadable(s:case.'.vim')
+  execute 'source '.fnameescape(s:case.'.vim')
+endif
+filetype plugin indent on
+syntax on
+
+messages clear
+execute 'silent edit '.fnameescape(s:case.'.vue')
+redraw
+
+" Indent
+let s:lines = getline(1, '$')
+silent normal! gg=G
+let s:indented = getline(1, '$')
+if s:indented != s:lines
+  let s:lnum = 0
+  while s:lnum < len(s:lines) && get(s:indented, s:lnum) ==# s:lines[s:lnum]
+    let s:lnum += 1
+  endwhile
+  call Fail(printf('indent changed at line %d: expected %s, but got %s',
+        \ s:lnum + 1, string(get(s:lines, s:lnum, '')),
+        \ string(get(s:indented, s:lnum, ''))))
+  silent undo
+endif
+
+" Assertions
+normal! gg
+if exists('*Check')
+  call Check()
+endif
+
+" Errors
+for s:msg in split(execute('messages'), "\n")
+  if s:msg =~# '^E\d\+:\|^Error detected'
+    call Fail('message: '.s:msg)
+  endif
+endfor
+
+let s:editor = has('nvim') ? 'nvim' : 'vim'
+call writefile(empty(s:errors)
+      \ ? [printf('ok   %s %s', s:editor, s:name)]
+      \ : [printf('FAIL %s %s', s:editor, s:name)]
+      \   + map(copy(s:errors), '"       ".v:val'),
+      \ $VUE_TEST_OUT, 'a')
+if !empty(s:errors)
+  cquit
+endif
+qall!
diff --git a/test/runtime/indent/yaml.vim b/test/runtime/indent/yaml.vim
new file mode 100644
index 0000000..143bd5a
--- /dev/null
+++ b/test/runtime/indent/yaml.vim
@@ -0,0 +1,157 @@
+" Vim indent file
+" Language:	YAML
+" Maintainer:	Nikolai Pavlov <zyx.vim@gmail.com>
+" Last Update:	Lukas Reineke
+" Last Change:	2020 Jun 07
+
+" Only load this indent file when no other was loaded.
+if exists('b:did_indent')
+  finish
+endif
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+let b:did_indent = 1
+
+setlocal indentexpr=GetYAMLIndent(v:lnum)
+setlocal indentkeys=!^F,o,O,0#,0},0],<:>,0-
+setlocal nosmartindent
+
+let b:undo_indent = 'setlocal indentexpr< indentkeys< smartindent<'
+
+" Only define the function once.
+if exists('*GetYAMLIndent')
+    finish
+endif
+
+function s:FindPrevLessIndentedLine(lnum, ...)
+    let prevlnum = prevnonblank(a:lnum-1)
+    let curindent = a:0 ? a:1 : indent(a:lnum)
+    while           prevlnum
+                \&&  indent(prevlnum) >=  curindent
+                \&& getline(prevlnum) !~# '^\s*#'
+        let prevlnum = prevnonblank(prevlnum-1)
+    endwhile
+    return prevlnum
+endfunction
+
+function s:FindPrevLEIndentedLineMatchingRegex(lnum, regex)
+    let plilnum = s:FindPrevLessIndentedLine(a:lnum, indent(a:lnum)+1)
+    while plilnum && getline(plilnum) !~# a:regex
+        let plilnum = s:FindPrevLessIndentedLine(plilnum)
+    endwhile
+    return plilnum
+endfunction
+
+let s:mapkeyregex='\v^\s*\#@!\S@=%(\''%([^'']|\''\'')*\'''.
+                \                 '|\"%([^"\\]|\\.)*\"'.
+                \                 '|%(%(\:\ )@!.)*)\:%(\ |$)'
+let s:liststartregex='\v^\s*%(\-%(\ |$))'
+
+let s:c_ns_anchor_char = '\v%([\n\r\uFEFF \t,[\]{}]@!\p)'
+let s:c_ns_anchor_name = s:c_ns_anchor_char.'+'
+let s:c_ns_anchor_property =  '\v\&'.s:c_ns_anchor_name
+
+let s:ns_word_char = '\v[[:alnum:]_\-]'
+let s:ns_tag_char  = '\v%('.s:ns_word_char.'|[#/;?:@&=+$.~*''()])'
+let s:c_named_tag_handle     = '\v\!'.s:ns_word_char.'+\!'
+let s:c_secondary_tag_handle = '\v\!\!'
+let s:c_primary_tag_handle   = '\v\!'
+let s:c_tag_handle = '\v%('.s:c_named_tag_handle.
+            \            '|'.s:c_secondary_tag_handle.
+            \            '|'.s:c_primary_tag_handle.')'
+let s:c_ns_shorthand_tag = '\v'.s:c_tag_handle . s:ns_tag_char.'+'
+let s:c_non_specific_tag = '\v\!'
+let s:ns_uri_char  = '\v%('.s:ns_word_char.'\v|[#/;?:@&=+$,.!~*''()[\]])'
+let s:c_verbatim_tag = '\v\!\<'.s:ns_uri_char.'+\>'
+let s:c_ns_tag_property = '\v'.s:c_verbatim_tag.
+            \               '\v|'.s:c_ns_shorthand_tag.
+            \               '\v|'.s:c_non_specific_tag
+
+let s:block_scalar_header = '\v[|>]%([+-]?[1-9]|[1-9]?[+-])?'
+
+function GetYAMLIndent(lnum)
+    if a:lnum == 1 || !prevnonblank(a:lnum-1)
+        return 0
+    endif
+
+    let prevlnum = prevnonblank(a:lnum-1)
+    let previndent = indent(prevlnum)
+
+    let line = getline(a:lnum)
+    if line =~# '^\s*#' && getline(a:lnum-1) =~# '^\s*#'
+        " Comment blocks should have identical indent
+        return previndent
+    elseif line =~# '^\s*[\]}]'
+        " Lines containing only closing braces should have previous indent
+        return indent(s:FindPrevLessIndentedLine(a:lnum))
+    endif
+
+    " Ignore comment lines when calculating indent
+    while getline(prevlnum) =~# '^\s*#'
+        let prevlnum = prevnonblank(prevlnum-1)
+        if !prevlnum
+            return previndent
+        endif
+    endwhile
+
+    let prevline = getline(prevlnum)
+    let previndent = indent(prevlnum)
+
+    " Any examples below assume that shiftwidth=2
+    if prevline =~# '\v[{[:]$|[:-]\ [|>][+\-]?%(\s+\#.*|\s*)$'
+        " Mapping key:
+        "     nested mapping: ...
+        "
+        " - {
+        "     key: [
+        "         list value
+        "     ]
+        " }
+        "
+        " - |-
+        "     Block scalar without indentation indicator
+        return previndent+shiftwidth()
+    elseif prevline =~# '\v[:-]\ [|>]%(\d+[+\-]?|[+\-]?\d+)%(\#.*|\s*)$'
+        " - |+2
+        "   block scalar with indentation indicator
+        "#^^ indent+2, not indent+shiftwidth
+        return previndent + str2nr(matchstr(prevline,
+                    \'\v([:-]\ [|>])@<=[+\-]?\d+%([+\-]?%(\s+\#.*|\s*)$)@='))
+    elseif prevline =~# '\v\"%([^"\\]|\\.)*\\$'
+        "    "Multiline string \
+        "     with escaped end"
+        let qidx = match(prevline, '\v\"%([^"\\]|\\.)*\\')
+        return virtcol([prevlnum, qidx+1])
+    elseif line =~# s:liststartregex
+        " List line should have indent equal to previous list line unless it was 
+        " caught by one of the previous rules
+        return indent(s:FindPrevLEIndentedLineMatchingRegex(a:lnum,
+                    \                                       s:liststartregex))
+    elseif line =~# s:mapkeyregex
+        " Same for line containing mapping key
+        let prevmapline = s:FindPrevLEIndentedLineMatchingRegex(a:lnum,
+                    \                                           s:mapkeyregex)
+        if getline(prevmapline) =~# '^\s*- '
+            return indent(prevmapline) + 2
+        else
+            return indent(prevmapline)
+        endif
+    elseif prevline =~# '^\s*- '
+        " - List with
+        "   multiline scalar
+        return previndent+2
+    elseif prevline =~# s:mapkeyregex . '\v\s*%(%('.s:c_ns_tag_property.
+                \                              '\v|'.s:c_ns_anchor_property.
+                \                              '\v|'.s:block_scalar_header.
+                \                             '\v)%(\s+|\s*%(\#.*)?$))*'
+        " Mapping with: value
+        "     that is multiline scalar
+        return previndent+shiftwidth()
+    endif
+    return previndent
+endfunction
+
+let &cpo = s:save_cpo
+