diff --git a/package.json b/package.json
index f5b2426..0fe446b 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "uvu": "^0.5.0"
   },
   "devDependencies": {
-    "@types/tape": "^4.0.0",
+    "@types/node": "^18.0.0",
     "c8": "^7.0.0",
     "html-void-elements": "^2.0.0",
     "micromark": "^3.0.0",
diff --git a/test/index.js b/test/index.js
index dcfa5f5..2880738 100644
--- a/test/index.js
+++ b/test/index.js
@@ -4,1161 +4,1160 @@
  * @typedef {import('../dev/index.js').Handle} Handle
  */
 
-import test from 'tape'
+import assert from 'node:assert/strict'
+import test from 'node:test'
 import {micromark} from 'micromark'
 import {htmlVoidElements} from 'html-void-elements'
 import {directive as syntax, directiveHtml as html} from '../dev/index.js'
 
 const own = {}.hasOwnProperty
 
-test('micromark-extension-directive (syntax)', (t) => {
-  t.test('text', (t) => {
-    t.equal(
-      micromark('\\:a', options()),
-      '<p>:a</p>',
-      'should support an escaped colon which would otherwise be a directive'
-    )
-
-    t.equal(
-      micromark('\\::a', options()),
-      '<p>:</p>',
-      'should support a directive after an escaped colon'
-    )
-
-    t.equal(
-      micromark('a ::b', options()),
-      '<p>a ::b</p>',
-      'should not support a directive after a colon'
-    )
-
-    t.equal(
-      micromark(':', options()),
-      '<p>:</p>',
-      'should not support a colon not followed by an alpha'
-    )
-
-    t.equal(
-      micromark(':a', options()),
-      '<p></p>',
-      'should support a colon followed by an alpha'
-    )
-
-    t.equal(
-      micromark(':9', options()),
-      '<p>:9</p>',
-      'should not support a colon followed by a digit'
-    )
-
-    t.equal(
-      micromark(':-', options()),
-      '<p>:-</p>',
-      'should not support a colon followed by a dash'
-    )
-
-    t.equal(
-      micromark(':_', options()),
-      '<p>:_</p>',
-      'should not support a colon followed by an underscore'
-    )
-
-    t.equal(
-      micromark(':a9', options()),
-      '<p></p>',
-      'should support a digit in a name'
-    )
-
-    t.equal(
-      micromark(':a-b', options()),
-      '<p></p>',
-      'should support a dash in a name'
-    )
-
-    t.equal(
-      micromark(':a-', options()),
-      '<p>:a-</p>',
-      'should *not* support a dash at the end of a name'
-    )
-
-    t.equal(
-      micromark(':a_b', options()),
-      '<p></p>',
-      'should support an underscore in a name'
-    )
-
-    t.equal(
-      micromark(':a_', options()),
-      '<p>:a_</p>',
-      'should *not* support an underscore at the end of a name'
-    )
-
-    t.equal(
-      micromark(':a:', options()),
-      '<p>:a:</p>',
-      'should *not* support a colon right after a name'
-    )
-
-    t.equal(
-      micromark(':+1:', options()),
-      '<p>:+1:</p>',
-      'should not interfere w/ gemoji (1)'
-    )
-
-    t.equal(
-      micromark(':heart:', options()),
-      '<p>:heart:</p>',
-      'should not interfere w/ gemoji (2)'
-    )
-
-    t.equal(
-      micromark(':call_me_hand:', options()),
-      '<p>:call_me_hand:</p>',
-      'should not interfere w/ gemoji (3)'
-    )
-
-    t.equal(
-      micromark('_:directive_', options()),
-      '<p><em>:directive</em></p>',
-      'should not interfere w/ emphasis (`_`)'
-    )
-
-    t.equal(
-      micromark(':a[', options()),
-      '<p>[</p>',
-      'should support a name followed by an unclosed `[`'
-    )
-
-    t.equal(
-      micromark(':a{', options()),
-      '<p>{</p>',
-      'should support a name followed by an unclosed `{`'
-    )
-
-    t.equal(
-      micromark(':a[b', options()),
-      '<p>[b</p>',
-      'should support a name followed by an unclosed `[` w/ content'
-    )
-
-    t.equal(
-      micromark(':a{b', options()),
-      '<p>{b</p>',
-      'should support a name followed by an unclosed `{` w/ content'
-    )
-
-    t.equal(
-      micromark(':a[]', options()),
-      '<p></p>',
-      'should support an empty label'
-    )
-
-    t.equal(
-      micromark(':a[ \t]', options()),
-      '<p></p>',
-      'should support a whitespace only label'
-    )
-
-    t.equal(
-      micromark(':a[\n]', options()),
-      '<p></p>',
-      'should support an eol in an label'
-    )
-
-    t.equal(
-      micromark(':a[a b c]asd', options()),
-      '<p>asd</p>',
-      'should support content in an label'
-    )
-
-    t.equal(
-      micromark(':a[a *b* c]asd', options()),
-      '<p>asd</p>',
-      'should support markdown in an label'
-    )
-
-    t.equal(
-      micromark('a :b[c :d[e] f] g', options()),
-      '<p>a  g</p>',
-      'should support a directive in an label'
-    )
-
-    t.equal(
-      micromark(':a[]asd', options()),
-      '<p>asd</p>',
-      'should support content after a label'
-    )
-
-    t.equal(
-      micromark(':a{}', options()),
-      '<p></p>',
-      'should support empty attributes'
-    )
-
-    t.equal(
-      micromark(':a{ \t}', options()),
-      '<p></p>',
-      'should support whitespace only attributes'
-    )
-
-    t.equal(
-      micromark(':a{\n}', options()),
-      '<p></p>',
-      'should support an eol in attributes'
-    )
-
-    t.equal(
-      micromark(':a{a b c}', options()),
-      '<p></p>',
-      'should support attributes w/o values'
-    )
-
-    t.equal(
-      micromark(':a{a=b c=d}', options()),
-      '<p></p>',
-      'should support attributes w/ unquoted values'
-    )
-
-    t.equal(
-      micromark(':a{.a .b}', options()),
-      '<p></p>',
-      'should support attributes w/ class shortcut'
-    )
-
-    t.equal(
-      micromark(':a{.a.b}', options()),
-      '<p></p>',
-      'should support attributes w/ class shortcut w/o whitespace between'
-    )
-
-    t.equal(
-      micromark(':a{#a #b}', options()),
-      '<p></p>',
-      'should support attributes w/ id shortcut'
-    )
-
-    t.equal(
-      micromark(':a{#a#b}', options()),
-      '<p></p>',
-      'should support attributes w/ id shortcut w/o whitespace between'
-    )
-
-    t.equal(
-      micromark(':a{#a.b.c#d e f=g #h.i.j}', options()),
-      '<p></p>',
-      'should support attributes w/ shortcuts combined w/ other attributes'
-    )
-
-    t.equal(
-      micromark(':a{..b}', options()),
-      '<p>{..b}</p>',
-      'should not support an empty shortcut (`.`)'
-    )
-
-    t.equal(
-      micromark(':a{.#b}', options()),
-      '<p>{.#b}</p>',
-      'should not support an empty shortcut (`#`)'
-    )
-
-    t.equal(
-      micromark(':a{.}', options()),
-      '<p>{.}</p>',
-      'should not support an empty shortcut (`}`)'
-    )
-
-    t.equal(
-      micromark(':a{.a=b}', options()),
-      '<p>{.a=b}</p>',
-      'should not support certain characters in shortcuts (`=`)'
-    )
-
-    t.equal(
-      micromark(':a{.a"b}', options()),
-      '<p>{.a&quot;b}</p>',
-      'should not support certain characters in shortcuts (`"`)'
-    )
-
-    t.equal(
-      micromark(':a{.a<b}', options()),
-      '<p>{.a&lt;b}</p>',
-      'should not support certain characters in shortcuts (`<`)'
-    )
-
-    t.equal(
-      micromark(':a{.a💚b}', options()),
-      '<p></p>',
-      'should support most characters in shortcuts'
-    )
-
-    t.equal(
-      micromark(':a{_}', options()),
-      '<p></p>',
-      'should support an underscore in attribute names'
-    )
-
-    t.equal(
-      micromark(':a{xml:lang}', options()),
-      '<p></p>',
-      'should support a colon in attribute names'
-    )
-
-    t.equal(
-      micromark(':a{a="b" c="d e f"}', options()),
-      '<p></p>',
-      'should support double quoted attributes'
-    )
-
-    t.equal(
-      micromark(":a{a='b' c='d e f'}", options()),
-      '<p></p>',
-      'should support single quoted attributes'
-    )
-
-    t.equal(
-      micromark(':a{a = b c\t=\t\'d\' f  =\r"g"}', options()),
-      '<p></p>',
-      'should support whitespace around initializers'
-    )
-
-    t.equal(
-      micromark(':a{b==}', options()),
-      '<p>{b==}</p>',
-      'should not support `=` to start an unquoted attribute value'
-    )
-
-    t.equal(
-      micromark(':a{b=}', options()),
-      '<p>{b=}</p>',
-      'should not support a missing attribute value after `=`'
-    )
-
-    t.equal(
-      micromark(":a{b=c'}", options()),
-      "<p>{b=c'}</p>",
-      'should not support an apostrophe in an unquoted attribute value'
-    )
-
-    t.equal(
-      micromark(':a{b=c`}', options()),
-      '<p>{b=c`}</p>',
-      'should not support a grave accent in an unquoted attribute value'
-    )
-
-    t.equal(
-      micromark(':a{b=a💚b}', options()),
-      '<p></p>',
-      'should support most other characters in unquoted attribute values'
-    )
-
-    t.equal(
-      micromark(':a{b="c', options()),
-      '<p>{b=&quot;c</p>',
-      'should not support an EOF in a quoted attribute value'
-    )
-
-    t.equal(
-      micromark(':a{b="a💚b"}', options()),
-      '<p></p>',
-      'should support most other characters in quoted attribute values'
-    )
-
-    t.equal(
-      micromark(':a{b="\nc\r  d"}', options()),
-      '<p></p>',
-      'should support EOLs in quoted attribute values'
-    )
-
-    t.equal(
-      micromark(':a{b="c"', options()),
-      '<p>{b=&quot;c&quot;</p>',
-      'should not support an EOF after a quoted attribute value'
-    )
-
-    t.end()
-  })
-
-  t.test('leaf', (t) => {
-    t.equal(micromark('::b', options()), '', 'should support a directive')
-
-    t.equal(
-      micromark(':', options()),
-      '<p>:</p>',
-      'should not support one colon'
-    )
-
-    t.equal(
-      micromark('::', options()),
-      '<p>::</p>',
-      'should not support two colons not followed by an alpha'
-    )
-
-    t.equal(
-      micromark('::a', options()),
-      '',
-      'should support two colons followed by an alpha'
-    )
-
-    t.equal(
-      micromark('::9', options()),
-      '<p>::9</p>',
-      'should not support two colons followed by a digit'
-    )
-
-    t.equal(
-      micromark('::-', options()),
-      '<p>::-</p>',
-      'should not support two colons followed by a dash'
-    )
-
-    t.equal(
-      micromark('::a9', options()),
-      '',
-      'should support a digit in a name'
-    )
-
-    t.equal(
-      micromark('::a-b', options()),
-      '',
-      'should support a dash in a name'
-    )
-
-    t.equal(
-      micromark('::a[', options()),
-      '<p>::a[</p>',
-      'should not support a name followed by an unclosed `[`'
-    )
-
-    t.equal(
-      micromark('::a{', options()),
-      '<p>::a{</p>',
-      'should not support a name followed by an unclosed `{`'
-    )
-
-    t.equal(
-      micromark('::a[b', options()),
-      '<p>::a[b</p>',
-      'should not support a name followed by an unclosed `[` w/ content'
-    )
-
-    t.equal(
-      micromark('::a{b', options()),
-      '<p>::a{b</p>',
-      'should not support a name followed by an unclosed `{` w/ content'
-    )
-
-    t.equal(micromark('::a[]', options()), '', 'should support an empty label')
-
-    t.equal(
-      micromark('::a[ \t]', options()),
-      '',
-      'should support a whitespace only label'
-    )
-
-    t.equal(
-      micromark('::a[\n]', options()),
-      '<p>::a[\n]</p>',
-      'should not support an eol in an label'
-    )
-
-    t.equal(
-      micromark('::a[a b c]', options()),
-      '',
-      'should support content in an label'
-    )
-
-    t.equal(
-      micromark('::a[a *b* c]', options()),
-      '',
-      'should support markdown in an label'
-    )
-
-    t.equal(
-      micromark('::a[]asd', options()),
-      '<p>::a[]asd</p>',
-      'should not support content after a label'
-    )
-
-    t.equal(
-      micromark('::a{}', options()),
-      '',
-      'should support empty attributes'
-    )
-
-    t.equal(
-      micromark('::a{ \t}', options()),
-      '',
-      'should support whitespace only attributes'
-    )
-
-    t.equal(
-      micromark('::a{\n}', options()),
-      '<p>::a{\n}</p>',
-      'should not support an eol in attributes'
-    )
-
-    t.equal(
-      micromark('::a{a b c}', options()),
-      '',
-      'should support attributes w/o values'
-    )
-
-    t.equal(
-      micromark('::a{a=b c=d}', options()),
-      '',
-      'should support attributes w/ unquoted values'
-    )
-
-    t.equal(
-      micromark('::a{.a .b}', options()),
-      '',
-      'should support attributes w/ class shortcut'
-    )
-
-    t.equal(
-      micromark('::a{#a #b}', options()),
-      '',
-      'should support attributes w/ id shortcut'
-    )
-
-    t.equal(
-      micromark('::a{.a💚b}', options()),
-      '',
-      'should support most characters in shortcuts'
-    )
-
-    t.equal(
-      micromark('::a{a="b" c="d e f"}', options()),
-      '',
-      'should support double quoted attributes'
-    )
-
-    t.equal(
-      micromark("::a{a='b' c='d e f'}", options()),
-      '',
-      'should support single quoted attributes'
-    )
-
-    t.equal(
-      micromark("::a{a = b c\t=\t'd'}", options()),
-      '',
-      'should support whitespace around initializers'
-    )
-
-    t.equal(
-      micromark('::a{f  =\rg}', options()),
-      '<p>::a{f  =\rg}</p>',
-      'should not support EOLs around initializers'
-    )
-
-    t.equal(
-      micromark('::a{b==}', options()),
-      '<p>::a{b==}</p>',
-      'should not support `=` to start an unquoted attribute value'
-    )
-
-    t.equal(
-      micromark('::a{b=a💚b}', options()),
-      '',
-      'should support most other characters in unquoted attribute values'
-    )
-
-    t.equal(
-      micromark('::a{b="c', options()),
-      '<p>::a{b=&quot;c</p>',
-      'should not support an EOF in a quoted attribute value'
-    )
-
-    t.equal(
-      micromark('::a{b="a💚b"}', options()),
-      '',
-      'should support most other characters in quoted attribute values'
-    )
-
-    t.equal(
-      micromark('::a{b="\nc\r  d"}', options()),
-      '<p>::a{b=&quot;\nc\rd&quot;}</p>',
-      'should not support EOLs in quoted attribute values'
-    )
-
-    t.equal(
-      micromark('::a{b="c"', options()),
-      '<p>::a{b=&quot;c&quot;</p>',
-      'should not support an EOF after a quoted attribute value'
-    )
-
-    t.equal(
-      micromark('::a{b=c} \t ', options()),
-      '',
-      'should support whitespace after directives'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n>a', options()),
-      '<blockquote>\n<p>a</p>\n</blockquote>',
-      'should support a block quote after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n```js\na', options()),
-      '<pre><code class="language-js">a\n</code></pre>\n',
-      'should support code (fenced) after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n    a', options()),
-      '<pre><code>a\n</code></pre>',
-      'should support code (indented) after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n[a]: b', options()),
-      '',
-      'should support a definition after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n# a', options()),
-      '<h1>a</h1>',
-      'should support a heading (atx) after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\na\n=', options()),
-      '<h1>a</h1>',
-      'should support a heading (setext) after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n<!-->', options()),
-      '<!-->',
-      'should support html after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n* a', options()),
-      '<ul>\n<li>a</li>\n</ul>',
-      'should support a list after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\na', options()),
-      '<p>a</p>',
-      'should support a paragraph after a leaf'
-    )
-
-    t.equal(
-      micromark('::a{b=c}\n***', options()),
-      '<hr />',
-      'should support a thematic break after a leaf'
-    )
-
-    t.equal(
-      micromark('>a\n::a{b=c}', options()),
-      '<blockquote>\n<p>a</p>\n</blockquote>\n',
-      'should support a block quote before a leaf'
-    )
-
-    t.equal(
-      micromark('```js\na\n```\n::a{b=c}', options()),
-      '<pre><code class="language-js">a\n</code></pre>\n',
-      'should support code (fenced) before a leaf'
-    )
-
-    t.equal(
-      micromark('    a\n::a{b=c}', options()),
-      '<pre><code>a\n</code></pre>\n',
-      'should support code (indented) before a leaf'
-    )
-
-    t.equal(
-      micromark('[a]: b\n::a{b=c}', options()),
-      '',
-      'should support a definition before a leaf'
-    )
-
-    t.equal(
-      micromark('# a\n::a{b=c}', options()),
-      '<h1>a</h1>\n',
-      'should support a heading (atx) before a leaf'
-    )
-
-    t.equal(
-      micromark('a\n=\n::a{b=c}', options()),
-      '<h1>a</h1>\n',
-      'should support a heading (setext) before a leaf'
-    )
-
-    t.equal(
-      micromark('<!-->\n::a{b=c}', options()),
-      '<!-->\n',
-      'should support html before a leaf'
-    )
-
-    t.equal(
-      micromark('* a\n::a{b=c}', options()),
-      '<ul>\n<li>a</li>\n</ul>\n',
-      'should support a list before a leaf'
-    )
-
-    t.equal(
-      micromark('a\n::a{b=c}', options()),
-      '<p>a</p>\n',
-      'should support a paragraph before a leaf'
-    )
-
-    t.equal(
-      micromark('***\n::a{b=c}', options()),
-      '<hr />\n',
-      'should support a thematic break before a leaf'
-    )
-
-    t.equal(
-      micromark('> ::a\nb', options({'*': h})),
-      '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
-      'should not support lazyness (1)'
-    )
-
-    t.equal(
-      micromark('> a\n::b', options({'*': h})),
-      '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
-      'should not support lazyness (2)'
-    )
-
-    t.end()
-  })
-
-  t.test('container', (t) => {
-    t.equal(micromark(':::b', options()), '', 'should support a directive')
-
-    t.equal(
-      micromark(':', options()),
-      '<p>:</p>',
-      'should not support one colon'
-    )
-
-    t.equal(
-      micromark('::', options()),
-      '<p>::</p>',
-      'should not support two colons not followed by an alpha'
-    )
-
-    t.equal(
-      micromark(':::', options()),
-      '<p>:::</p>',
-      'should not support three colons not followed by an alpha'
-    )
-
-    t.equal(
-      micromark(':::a', options()),
-      '',
-      'should support three colons followed by an alpha'
-    )
-
-    t.equal(
-      micromark(':::9', options()),
-      '<p>:::9</p>',
-      'should not support three colons followed by a digit'
-    )
-
-    t.equal(
-      micromark(':::-', options()),
-      '<p>:::-</p>',
-      'should not support three colons followed by a dash'
-    )
-
-    t.equal(
-      micromark(':::a9', options()),
-      '',
-      'should support a digit in a name'
-    )
-
-    t.equal(
-      micromark(':::a-b', options()),
-      '',
-      'should support a dash in a name'
-    )
-
-    t.equal(
-      micromark(':::a[', options()),
-      '<p>:::a[</p>',
-      'should not support a name followed by an unclosed `[`'
-    )
-
-    t.equal(
-      micromark(':::a{', options()),
-      '<p>:::a{</p>',
-      'should not support a name followed by an unclosed `{`'
-    )
-
-    t.equal(
-      micromark(':::a[b', options()),
-      '<p>:::a[b</p>',
-      'should not support a name followed by an unclosed `[` w/ content'
-    )
-
-    t.equal(
-      micromark(':::a{b', options()),
-      '<p>:::a{b</p>',
-      'should not support a name followed by an unclosed `{` w/ content'
-    )
-
-    t.equal(micromark(':::a[]', options()), '', 'should support an empty label')
-
-    t.equal(
-      micromark(':::a[ \t]', options()),
-      '',
-      'should support a whitespace only label'
-    )
-
-    t.equal(
-      micromark(':::a[\n]', options()),
-      '<p>:::a[\n]</p>',
-      'should not support an eol in an label'
-    )
-
-    t.equal(
-      micromark(':::a[a b c]', options()),
-      '',
-      'should support content in an label'
-    )
-
-    t.equal(
-      micromark(':::a[a *b* c]', options()),
-      '',
-      'should support markdown in an label'
-    )
-
-    t.equal(
-      micromark(':::a[]asd', options()),
-      '<p>:::a[]asd</p>',
-      'should not support content after a label'
-    )
-
-    t.equal(
-      micromark(':::a{}', options()),
-      '',
-      'should support empty attributes'
-    )
-
-    t.equal(
-      micromark(':::a{ \t}', options()),
-      '',
-      'should support whitespace only attributes'
-    )
-
-    t.equal(
-      micromark(':::a{\n}', options()),
-      '<p>:::a{\n}</p>',
-      'should not support an eol in attributes'
-    )
-
-    t.equal(
-      micromark(':::a{a b c}', options()),
-      '',
-      'should support attributes'
-    )
-
-    t.equal(
-      micromark(':::a{f  =\rg}', options()),
-      '<p>:::a{f  =\rg}</p>',
-      'should not support EOLs around initializers'
-    )
-
-    t.equal(
-      micromark(':::a{b="c', options()),
-      '<p>:::a{b=&quot;c</p>',
-      'should not support an EOF in a quoted attribute value'
-    )
-
-    t.equal(
-      micromark(':::a{b="\nc\r  d"}', options()),
-      '<p>:::a{b=&quot;\nc\rd&quot;}</p>',
-      'should not support EOLs in quoted attribute values'
-    )
-
-    t.equal(
-      micromark(':::a{b="c"', options()),
-      '<p>:::a{b=&quot;c&quot;</p>',
-      'should not support an EOF after a quoted attribute value'
-    )
-
-    t.equal(
-      micromark(':::a{b=c} \t ', options()),
-      '',
-      'should support whitespace after directives'
-    )
-
-    t.equal(
-      micromark(':::a\n', options()),
-      '',
-      'should support no closing fence'
-    )
-
-    t.equal(
-      micromark(':::a\n:::', options()),
-      '',
-      'should support an immediate closing fence'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\nb', options()),
-      '<p>b</p>',
-      'should support content after a closing fence'
-    )
-
-    t.equal(
-      micromark(':::a\n::\nb', options()),
-      '',
-      'should not close w/ a “closing” fence of two colons'
-    )
-
-    t.equal(
-      micromark(':::a\n::::\nb', options()),
-      '<p>b</p>',
-      'should close w/ a closing fence of more colons'
-    )
-
-    t.equal(
-      micromark('::::a\n::::\nb', options()),
-      '<p>b</p>',
-      'should support more opening colons'
-    )
-
-    t.equal(
-      micromark(':::::a\n::::\nb', options()),
-      '',
-      'should not close w/ a “closing” fence of less colons than the opening'
-    )
-
-    t.equal(
-      micromark(':::a\n::: \t\nc', options()),
-      '<p>c</p>',
-      'should close w/ a closing fence followed by white space'
-    )
-
-    t.equal(
-      micromark(':::a\n::: b\nc', options()),
-      '',
-      'should not close w/ a “closing” fence followed by other characters'
-    )
-
-    t.equal(
-      micromark(':::a\n  :::\nc', options()),
-      '<p>c</p>',
-      'should close w/ an indented closing fence'
-    )
-
-    t.equal(
-      micromark(':::a\n\t:::\nc', options()),
-      '',
-      'should not close w/ when the “closing” fence is indented at a tab size'
-    )
-
-    t.equal(
-      micromark(':::a\n     :::\nc', options()),
-      '',
-      'should not close w/ when the “closing” fence is indented more than a tab size'
-    )
-
-    t.equal(
-      micromark(':::a\n\n  \n\ta', options()),
-      '',
-      'should support blank lines in content'
-    )
-
-    t.equal(
-      micromark(':::a\n\ta\n', options()),
-      '',
-      'should support an EOL EOF'
-    )
-
-    t.equal(
-      micromark('  :::a\n  b\n  :::\nc', options()),
-      '<p>c</p>',
-      'should support an indented directive'
-    )
-
-    t.equal(
-      micromark('  :::a\n\t:::\nc', options()),
-      '',
-      'should still not close an indented directive when the “closing” fence is indented a tab size'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n>a', options()),
-      '<blockquote>\n<p>a</p>\n</blockquote>',
-      'should support a block quote after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n```js\na', options()),
-      '<pre><code class="language-js">a\n</code></pre>\n',
-      'should support code (fenced) after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n    a', options()),
-      '<pre><code>a\n</code></pre>',
-      'should support code (indented) after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n[a]: b', options()),
-      '',
-      'should support a definition after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n# a', options()),
-      '<h1>a</h1>',
-      'should support a heading (atx) after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\na\n=', options()),
-      '<h1>a</h1>',
-      'should support a heading (setext) after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n<!-->', options()),
-      '<!-->',
-      'should support html after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n* a', options()),
-      '<ul>\n<li>a</li>\n</ul>',
-      'should support a list after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\na', options()),
-      '<p>a</p>',
-      'should support a paragraph after a container'
-    )
-
-    t.equal(
-      micromark(':::a\n:::\n***', options()),
-      '<hr />',
-      'should support a thematic break after a container'
-    )
-
-    t.equal(
-      micromark('>a\n:::a\nb', options()),
-      '<blockquote>\n<p>a</p>\n</blockquote>\n',
-      'should support a block quote before a container'
-    )
-
-    t.equal(
-      micromark('```js\na\n```\n:::a\nb', options()),
-      '<pre><code class="language-js">a\n</code></pre>\n',
-      'should support code (fenced) before a container'
-    )
-
-    t.equal(
-      micromark('    a\n:::a\nb', options()),
-      '<pre><code>a\n</code></pre>\n',
-      'should support code (indented) before a container'
-    )
-
-    t.equal(
-      micromark('[a]: b\n:::a\nb', options()),
-      '',
-      'should support a definition before a container'
-    )
-
-    t.equal(
-      micromark('# a\n:::a\nb', options()),
-      '<h1>a</h1>\n',
-      'should support a heading (atx) before a container'
-    )
-
-    t.equal(
-      micromark('a\n=\n:::a\nb', options()),
-      '<h1>a</h1>\n',
-      'should support a heading (setext) before a container'
-    )
-
-    t.equal(
-      micromark('<!-->\n:::a\nb', options()),
-      '<!-->\n',
-      'should support html before a container'
-    )
-
-    t.equal(
-      micromark('* a\n:::a\nb', options()),
-      '<ul>\n<li>a</li>\n</ul>\n',
-      'should support a list before a container'
-    )
-
-    t.equal(
-      micromark('a\n:::a\nb', options()),
-      '<p>a</p>\n',
-      'should support a paragraph before a container'
-    )
-
-    t.equal(
-      micromark('***\n:::a\nb', options()),
-      '<hr />\n',
-      'should support a thematic break before a container'
-    )
-
-    t.equal(
-      micromark(' :::x\n ', options({'*': h})),
-      '<x></x>',
-      'should support prefixed containers (1)'
-    )
-
-    t.equal(
-      micromark(' :::x\n - a', options({'*': h})),
-      '<x>\n<ul>\n<li>a</li>\n</ul>\n</x>',
-      'should support prefixed containers (2)'
-    )
-
-    t.equal(
-      micromark(' :::x\n - a\n > b', options({'*': h})),
-      '<x>\n<ul>\n<li>a</li>\n</ul>\n<blockquote>\n<p>b</p>\n</blockquote>\n</x>',
-      'should support prefixed containers (3)'
-    )
-
-    t.equal(
-      micromark(' :::x\n - a\n > b\n :::', options({'*': h})),
-      '<x>\n<ul>\n<li>a</li>\n</ul>\n<blockquote>\n<p>b</p>\n</blockquote>\n</x>',
-      'should support prefixed containers (4)'
-    )
-
-    t.equal(
-      micromark('> :::a\nb', options({'*': h})),
-      '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
-      'should not support lazyness (1)'
-    )
-
-    t.equal(
-      micromark('> :::a\n> b\nc', options({'*': h})),
-      '<blockquote><a>\n<p>b</p>\n</a>\n</blockquote>\n<p>c</p>',
-      'should not support lazyness (2)'
-    )
-
-    t.equal(
-      micromark('> a\n:::b', options({'*': h})),
-      '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
-      'should not support lazyness (3)'
-    )
-
-    t.equal(
-      micromark('> :::a\n:::', options({'*': h})),
-      '<blockquote><a></a>\n</blockquote>\n<p>:::</p>',
-      'should not support lazyness (4)'
-    )
-
-    t.end()
-  })
-
-  t.end()
+test('micromark-extension-directive (syntax, text)', () => {
+  assert.equal(
+    micromark('\\:a', options()),
+    '<p>:a</p>',
+    'should support an escaped colon which would otherwise be a directive'
+  )
+
+  assert.equal(
+    micromark('\\::a', options()),
+    '<p>:</p>',
+    'should support a directive after an escaped colon'
+  )
+
+  assert.equal(
+    micromark('a ::b', options()),
+    '<p>a ::b</p>',
+    'should not support a directive after a colon'
+  )
+
+  assert.equal(
+    micromark(':', options()),
+    '<p>:</p>',
+    'should not support a colon not followed by an alpha'
+  )
+
+  assert.equal(
+    micromark(':a', options()),
+    '<p></p>',
+    'should support a colon followed by an alpha'
+  )
+
+  assert.equal(
+    micromark(':9', options()),
+    '<p>:9</p>',
+    'should not support a colon followed by a digit'
+  )
+
+  assert.equal(
+    micromark(':-', options()),
+    '<p>:-</p>',
+    'should not support a colon followed by a dash'
+  )
+
+  assert.equal(
+    micromark(':_', options()),
+    '<p>:_</p>',
+    'should not support a colon followed by an underscore'
+  )
+
+  assert.equal(
+    micromark(':a9', options()),
+    '<p></p>',
+    'should support a digit in a name'
+  )
+
+  assert.equal(
+    micromark(':a-b', options()),
+    '<p></p>',
+    'should support a dash in a name'
+  )
+
+  assert.equal(
+    micromark(':a-', options()),
+    '<p>:a-</p>',
+    'should *not* support a dash at the end of a name'
+  )
+
+  assert.equal(
+    micromark(':a_b', options()),
+    '<p></p>',
+    'should support an underscore in a name'
+  )
+
+  assert.equal(
+    micromark(':a_', options()),
+    '<p>:a_</p>',
+    'should *not* support an underscore at the end of a name'
+  )
+
+  assert.equal(
+    micromark(':a:', options()),
+    '<p>:a:</p>',
+    'should *not* support a colon right after a name'
+  )
+
+  assert.equal(
+    micromark(':+1:', options()),
+    '<p>:+1:</p>',
+    'should not interfere w/ gemoji (1)'
+  )
+
+  assert.equal(
+    micromark(':heart:', options()),
+    '<p>:heart:</p>',
+    'should not interfere w/ gemoji (2)'
+  )
+
+  assert.equal(
+    micromark(':call_me_hand:', options()),
+    '<p>:call_me_hand:</p>',
+    'should not interfere w/ gemoji (3)'
+  )
+
+  assert.equal(
+    micromark('_:directive_', options()),
+    '<p><em>:directive</em></p>',
+    'should not interfere w/ emphasis (`_`)'
+  )
+
+  assert.equal(
+    micromark(':a[', options()),
+    '<p>[</p>',
+    'should support a name followed by an unclosed `[`'
+  )
+
+  assert.equal(
+    micromark(':a{', options()),
+    '<p>{</p>',
+    'should support a name followed by an unclosed `{`'
+  )
+
+  assert.equal(
+    micromark(':a[b', options()),
+    '<p>[b</p>',
+    'should support a name followed by an unclosed `[` w/ content'
+  )
+
+  assert.equal(
+    micromark(':a{b', options()),
+    '<p>{b</p>',
+    'should support a name followed by an unclosed `{` w/ content'
+  )
+
+  assert.equal(
+    micromark(':a[]', options()),
+    '<p></p>',
+    'should support an empty label'
+  )
+
+  assert.equal(
+    micromark(':a[ \t]', options()),
+    '<p></p>',
+    'should support a whitespace only label'
+  )
+
+  assert.equal(
+    micromark(':a[\n]', options()),
+    '<p></p>',
+    'should support an eol in an label'
+  )
+
+  assert.equal(
+    micromark(':a[a b c]asd', options()),
+    '<p>asd</p>',
+    'should support content in an label'
+  )
+
+  assert.equal(
+    micromark(':a[a *b* c]asd', options()),
+    '<p>asd</p>',
+    'should support markdown in an label'
+  )
+
+  assert.equal(
+    micromark('a :b[c :d[e] f] g', options()),
+    '<p>a  g</p>',
+    'should support a directive in an label'
+  )
+
+  assert.equal(
+    micromark(':a[]asd', options()),
+    '<p>asd</p>',
+    'should support content after a label'
+  )
+
+  assert.equal(
+    micromark(':a{}', options()),
+    '<p></p>',
+    'should support empty attributes'
+  )
+
+  assert.equal(
+    micromark(':a{ \t}', options()),
+    '<p></p>',
+    'should support whitespace only attributes'
+  )
+
+  assert.equal(
+    micromark(':a{\n}', options()),
+    '<p></p>',
+    'should support an eol in attributes'
+  )
+
+  assert.equal(
+    micromark(':a{a b c}', options()),
+    '<p></p>',
+    'should support attributes w/o values'
+  )
+
+  assert.equal(
+    micromark(':a{a=b c=d}', options()),
+    '<p></p>',
+    'should support attributes w/ unquoted values'
+  )
+
+  assert.equal(
+    micromark(':a{.a .b}', options()),
+    '<p></p>',
+    'should support attributes w/ class shortcut'
+  )
+
+  assert.equal(
+    micromark(':a{.a.b}', options()),
+    '<p></p>',
+    'should support attributes w/ class shortcut w/o whitespace between'
+  )
+
+  assert.equal(
+    micromark(':a{#a #b}', options()),
+    '<p></p>',
+    'should support attributes w/ id shortcut'
+  )
+
+  assert.equal(
+    micromark(':a{#a#b}', options()),
+    '<p></p>',
+    'should support attributes w/ id shortcut w/o whitespace between'
+  )
+
+  assert.equal(
+    micromark(':a{#a.b.c#d e f=g #h.i.j}', options()),
+    '<p></p>',
+    'should support attributes w/ shortcuts combined w/ other attributes'
+  )
+
+  assert.equal(
+    micromark(':a{..b}', options()),
+    '<p>{..b}</p>',
+    'should not support an empty shortcut (`.`)'
+  )
+
+  assert.equal(
+    micromark(':a{.#b}', options()),
+    '<p>{.#b}</p>',
+    'should not support an empty shortcut (`#`)'
+  )
+
+  assert.equal(
+    micromark(':a{.}', options()),
+    '<p>{.}</p>',
+    'should not support an empty shortcut (`}`)'
+  )
+
+  assert.equal(
+    micromark(':a{.a=b}', options()),
+    '<p>{.a=b}</p>',
+    'should not support certain characters in shortcuts (`=`)'
+  )
+
+  assert.equal(
+    micromark(':a{.a"b}', options()),
+    '<p>{.a&quot;b}</p>',
+    'should not support certain characters in shortcuts (`"`)'
+  )
+
+  assert.equal(
+    micromark(':a{.a<b}', options()),
+    '<p>{.a&lt;b}</p>',
+    'should not support certain characters in shortcuts (`<`)'
+  )
+
+  assert.equal(
+    micromark(':a{.a💚b}', options()),
+    '<p></p>',
+    'should support most characters in shortcuts'
+  )
+
+  assert.equal(
+    micromark(':a{_}', options()),
+    '<p></p>',
+    'should support an underscore in attribute names'
+  )
+
+  assert.equal(
+    micromark(':a{xml:lang}', options()),
+    '<p></p>',
+    'should support a colon in attribute names'
+  )
+
+  assert.equal(
+    micromark(':a{a="b" c="d e f"}', options()),
+    '<p></p>',
+    'should support double quoted attributes'
+  )
+
+  assert.equal(
+    micromark(":a{a='b' c='d e f'}", options()),
+    '<p></p>',
+    'should support single quoted attributes'
+  )
+
+  assert.equal(
+    micromark(':a{a = b c\t=\t\'d\' f  =\r"g"}', options()),
+    '<p></p>',
+    'should support whitespace around initializers'
+  )
+
+  assert.equal(
+    micromark(':a{b==}', options()),
+    '<p>{b==}</p>',
+    'should not support `=` to start an unquoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':a{b=}', options()),
+    '<p>{b=}</p>',
+    'should not support a missing attribute value after `=`'
+  )
+
+  assert.equal(
+    micromark(":a{b=c'}", options()),
+    "<p>{b=c'}</p>",
+    'should not support an apostrophe in an unquoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':a{b=c`}', options()),
+    '<p>{b=c`}</p>',
+    'should not support a grave accent in an unquoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':a{b=a💚b}', options()),
+    '<p></p>',
+    'should support most other characters in unquoted attribute values'
+  )
+
+  assert.equal(
+    micromark(':a{b="c', options()),
+    '<p>{b=&quot;c</p>',
+    'should not support an EOF in a quoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':a{b="a💚b"}', options()),
+    '<p></p>',
+    'should support most other characters in quoted attribute values'
+  )
+
+  assert.equal(
+    micromark(':a{b="\nc\r  d"}', options()),
+    '<p></p>',
+    'should support EOLs in quoted attribute values'
+  )
+
+  assert.equal(
+    micromark(':a{b="c"', options()),
+    '<p>{b=&quot;c&quot;</p>',
+    'should not support an EOF after a quoted attribute value'
+  )
 })
 
-test('micromark-extension-directive (compile)', (t) => {
-  t.equal(
+test('micromark-extension-directive (syntax, leaf)', () => {
+  assert.equal(micromark('::b', options()), '', 'should support a directive')
+
+  assert.equal(
+    micromark(':', options()),
+    '<p>:</p>',
+    'should not support one colon'
+  )
+
+  assert.equal(
+    micromark('::', options()),
+    '<p>::</p>',
+    'should not support two colons not followed by an alpha'
+  )
+
+  assert.equal(
+    micromark('::a', options()),
+    '',
+    'should support two colons followed by an alpha'
+  )
+
+  assert.equal(
+    micromark('::9', options()),
+    '<p>::9</p>',
+    'should not support two colons followed by a digit'
+  )
+
+  assert.equal(
+    micromark('::-', options()),
+    '<p>::-</p>',
+    'should not support two colons followed by a dash'
+  )
+
+  assert.equal(
+    micromark('::a9', options()),
+    '',
+    'should support a digit in a name'
+  )
+
+  assert.equal(
+    micromark('::a-b', options()),
+    '',
+    'should support a dash in a name'
+  )
+
+  assert.equal(
+    micromark('::a[', options()),
+    '<p>::a[</p>',
+    'should not support a name followed by an unclosed `[`'
+  )
+
+  assert.equal(
+    micromark('::a{', options()),
+    '<p>::a{</p>',
+    'should not support a name followed by an unclosed `{`'
+  )
+
+  assert.equal(
+    micromark('::a[b', options()),
+    '<p>::a[b</p>',
+    'should not support a name followed by an unclosed `[` w/ content'
+  )
+
+  assert.equal(
+    micromark('::a{b', options()),
+    '<p>::a{b</p>',
+    'should not support a name followed by an unclosed `{` w/ content'
+  )
+
+  assert.equal(
+    micromark('::a[]', options()),
+    '',
+    'should support an empty label'
+  )
+
+  assert.equal(
+    micromark('::a[ \t]', options()),
+    '',
+    'should support a whitespace only label'
+  )
+
+  assert.equal(
+    micromark('::a[\n]', options()),
+    '<p>::a[\n]</p>',
+    'should not support an eol in an label'
+  )
+
+  assert.equal(
+    micromark('::a[a b c]', options()),
+    '',
+    'should support content in an label'
+  )
+
+  assert.equal(
+    micromark('::a[a *b* c]', options()),
+    '',
+    'should support markdown in an label'
+  )
+
+  assert.equal(
+    micromark('::a[]asd', options()),
+    '<p>::a[]asd</p>',
+    'should not support content after a label'
+  )
+
+  assert.equal(
+    micromark('::a{}', options()),
+    '',
+    'should support empty attributes'
+  )
+
+  assert.equal(
+    micromark('::a{ \t}', options()),
+    '',
+    'should support whitespace only attributes'
+  )
+
+  assert.equal(
+    micromark('::a{\n}', options()),
+    '<p>::a{\n}</p>',
+    'should not support an eol in attributes'
+  )
+
+  assert.equal(
+    micromark('::a{a b c}', options()),
+    '',
+    'should support attributes w/o values'
+  )
+
+  assert.equal(
+    micromark('::a{a=b c=d}', options()),
+    '',
+    'should support attributes w/ unquoted values'
+  )
+
+  assert.equal(
+    micromark('::a{.a .b}', options()),
+    '',
+    'should support attributes w/ class shortcut'
+  )
+
+  assert.equal(
+    micromark('::a{#a #b}', options()),
+    '',
+    'should support attributes w/ id shortcut'
+  )
+
+  assert.equal(
+    micromark('::a{.a💚b}', options()),
+    '',
+    'should support most characters in shortcuts'
+  )
+
+  assert.equal(
+    micromark('::a{a="b" c="d e f"}', options()),
+    '',
+    'should support double quoted attributes'
+  )
+
+  assert.equal(
+    micromark("::a{a='b' c='d e f'}", options()),
+    '',
+    'should support single quoted attributes'
+  )
+
+  assert.equal(
+    micromark("::a{a = b c\t=\t'd'}", options()),
+    '',
+    'should support whitespace around initializers'
+  )
+
+  assert.equal(
+    micromark('::a{f  =\rg}', options()),
+    '<p>::a{f  =\rg}</p>',
+    'should not support EOLs around initializers'
+  )
+
+  assert.equal(
+    micromark('::a{b==}', options()),
+    '<p>::a{b==}</p>',
+    'should not support `=` to start an unquoted attribute value'
+  )
+
+  assert.equal(
+    micromark('::a{b=a💚b}', options()),
+    '',
+    'should support most other characters in unquoted attribute values'
+  )
+
+  assert.equal(
+    micromark('::a{b="c', options()),
+    '<p>::a{b=&quot;c</p>',
+    'should not support an EOF in a quoted attribute value'
+  )
+
+  assert.equal(
+    micromark('::a{b="a💚b"}', options()),
+    '',
+    'should support most other characters in quoted attribute values'
+  )
+
+  assert.equal(
+    micromark('::a{b="\nc\r  d"}', options()),
+    '<p>::a{b=&quot;\nc\rd&quot;}</p>',
+    'should not support EOLs in quoted attribute values'
+  )
+
+  assert.equal(
+    micromark('::a{b="c"', options()),
+    '<p>::a{b=&quot;c&quot;</p>',
+    'should not support an EOF after a quoted attribute value'
+  )
+
+  assert.equal(
+    micromark('::a{b=c} \t ', options()),
+    '',
+    'should support whitespace after directives'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n>a', options()),
+    '<blockquote>\n<p>a</p>\n</blockquote>',
+    'should support a block quote after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n```js\na', options()),
+    '<pre><code class="language-js">a\n</code></pre>\n',
+    'should support code (fenced) after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n    a', options()),
+    '<pre><code>a\n</code></pre>',
+    'should support code (indented) after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n[a]: b', options()),
+    '',
+    'should support a definition after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n# a', options()),
+    '<h1>a</h1>',
+    'should support a heading (atx) after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\na\n=', options()),
+    '<h1>a</h1>',
+    'should support a heading (setext) after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n<!-->', options()),
+    '<!-->',
+    'should support html after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n* a', options()),
+    '<ul>\n<li>a</li>\n</ul>',
+    'should support a list after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\na', options()),
+    '<p>a</p>',
+    'should support a paragraph after a leaf'
+  )
+
+  assert.equal(
+    micromark('::a{b=c}\n***', options()),
+    '<hr />',
+    'should support a thematic break after a leaf'
+  )
+
+  assert.equal(
+    micromark('>a\n::a{b=c}', options()),
+    '<blockquote>\n<p>a</p>\n</blockquote>\n',
+    'should support a block quote before a leaf'
+  )
+
+  assert.equal(
+    micromark('```js\na\n```\n::a{b=c}', options()),
+    '<pre><code class="language-js">a\n</code></pre>\n',
+    'should support code (fenced) before a leaf'
+  )
+
+  assert.equal(
+    micromark('    a\n::a{b=c}', options()),
+    '<pre><code>a\n</code></pre>\n',
+    'should support code (indented) before a leaf'
+  )
+
+  assert.equal(
+    micromark('[a]: b\n::a{b=c}', options()),
+    '',
+    'should support a definition before a leaf'
+  )
+
+  assert.equal(
+    micromark('# a\n::a{b=c}', options()),
+    '<h1>a</h1>\n',
+    'should support a heading (atx) before a leaf'
+  )
+
+  assert.equal(
+    micromark('a\n=\n::a{b=c}', options()),
+    '<h1>a</h1>\n',
+    'should support a heading (setext) before a leaf'
+  )
+
+  assert.equal(
+    micromark('<!-->\n::a{b=c}', options()),
+    '<!-->\n',
+    'should support html before a leaf'
+  )
+
+  assert.equal(
+    micromark('* a\n::a{b=c}', options()),
+    '<ul>\n<li>a</li>\n</ul>\n',
+    'should support a list before a leaf'
+  )
+
+  assert.equal(
+    micromark('a\n::a{b=c}', options()),
+    '<p>a</p>\n',
+    'should support a paragraph before a leaf'
+  )
+
+  assert.equal(
+    micromark('***\n::a{b=c}', options()),
+    '<hr />\n',
+    'should support a thematic break before a leaf'
+  )
+
+  assert.equal(
+    micromark('> ::a\nb', options({'*': h})),
+    '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
+    'should not support lazyness (1)'
+  )
+
+  assert.equal(
+    micromark('> a\n::b', options({'*': h})),
+    '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
+    'should not support lazyness (2)'
+  )
+})
+
+test('micromark-extension-directive (syntax, container)', () => {
+  assert.equal(micromark(':::b', options()), '', 'should support a directive')
+
+  assert.equal(
+    micromark(':', options()),
+    '<p>:</p>',
+    'should not support one colon'
+  )
+
+  assert.equal(
+    micromark('::', options()),
+    '<p>::</p>',
+    'should not support two colons not followed by an alpha'
+  )
+
+  assert.equal(
+    micromark(':::', options()),
+    '<p>:::</p>',
+    'should not support three colons not followed by an alpha'
+  )
+
+  assert.equal(
+    micromark(':::a', options()),
+    '',
+    'should support three colons followed by an alpha'
+  )
+
+  assert.equal(
+    micromark(':::9', options()),
+    '<p>:::9</p>',
+    'should not support three colons followed by a digit'
+  )
+
+  assert.equal(
+    micromark(':::-', options()),
+    '<p>:::-</p>',
+    'should not support three colons followed by a dash'
+  )
+
+  assert.equal(
+    micromark(':::a9', options()),
+    '',
+    'should support a digit in a name'
+  )
+
+  assert.equal(
+    micromark(':::a-b', options()),
+    '',
+    'should support a dash in a name'
+  )
+
+  assert.equal(
+    micromark(':::a[', options()),
+    '<p>:::a[</p>',
+    'should not support a name followed by an unclosed `[`'
+  )
+
+  assert.equal(
+    micromark(':::a{', options()),
+    '<p>:::a{</p>',
+    'should not support a name followed by an unclosed `{`'
+  )
+
+  assert.equal(
+    micromark(':::a[b', options()),
+    '<p>:::a[b</p>',
+    'should not support a name followed by an unclosed `[` w/ content'
+  )
+
+  assert.equal(
+    micromark(':::a{b', options()),
+    '<p>:::a{b</p>',
+    'should not support a name followed by an unclosed `{` w/ content'
+  )
+
+  assert.equal(
+    micromark(':::a[]', options()),
+    '',
+    'should support an empty label'
+  )
+
+  assert.equal(
+    micromark(':::a[ \t]', options()),
+    '',
+    'should support a whitespace only label'
+  )
+
+  assert.equal(
+    micromark(':::a[\n]', options()),
+    '<p>:::a[\n]</p>',
+    'should not support an eol in an label'
+  )
+
+  assert.equal(
+    micromark(':::a[a b c]', options()),
+    '',
+    'should support content in an label'
+  )
+
+  assert.equal(
+    micromark(':::a[a *b* c]', options()),
+    '',
+    'should support markdown in an label'
+  )
+
+  assert.equal(
+    micromark(':::a[]asd', options()),
+    '<p>:::a[]asd</p>',
+    'should not support content after a label'
+  )
+
+  assert.equal(
+    micromark(':::a{}', options()),
+    '',
+    'should support empty attributes'
+  )
+
+  assert.equal(
+    micromark(':::a{ \t}', options()),
+    '',
+    'should support whitespace only attributes'
+  )
+
+  assert.equal(
+    micromark(':::a{\n}', options()),
+    '<p>:::a{\n}</p>',
+    'should not support an eol in attributes'
+  )
+
+  assert.equal(
+    micromark(':::a{a b c}', options()),
+    '',
+    'should support attributes'
+  )
+
+  assert.equal(
+    micromark(':::a{f  =\rg}', options()),
+    '<p>:::a{f  =\rg}</p>',
+    'should not support EOLs around initializers'
+  )
+
+  assert.equal(
+    micromark(':::a{b="c', options()),
+    '<p>:::a{b=&quot;c</p>',
+    'should not support an EOF in a quoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':::a{b="\nc\r  d"}', options()),
+    '<p>:::a{b=&quot;\nc\rd&quot;}</p>',
+    'should not support EOLs in quoted attribute values'
+  )
+
+  assert.equal(
+    micromark(':::a{b="c"', options()),
+    '<p>:::a{b=&quot;c&quot;</p>',
+    'should not support an EOF after a quoted attribute value'
+  )
+
+  assert.equal(
+    micromark(':::a{b=c} \t ', options()),
+    '',
+    'should support whitespace after directives'
+  )
+
+  assert.equal(
+    micromark(':::a\n', options()),
+    '',
+    'should support no closing fence'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::', options()),
+    '',
+    'should support an immediate closing fence'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\nb', options()),
+    '<p>b</p>',
+    'should support content after a closing fence'
+  )
+
+  assert.equal(
+    micromark(':::a\n::\nb', options()),
+    '',
+    'should not close w/ a “closing” fence of two colons'
+  )
+
+  assert.equal(
+    micromark(':::a\n::::\nb', options()),
+    '<p>b</p>',
+    'should close w/ a closing fence of more colons'
+  )
+
+  assert.equal(
+    micromark('::::a\n::::\nb', options()),
+    '<p>b</p>',
+    'should support more opening colons'
+  )
+
+  assert.equal(
+    micromark(':::::a\n::::\nb', options()),
+    '',
+    'should not close w/ a “closing” fence of less colons than the opening'
+  )
+
+  assert.equal(
+    micromark(':::a\n::: \t\nc', options()),
+    '<p>c</p>',
+    'should close w/ a closing fence followed by white space'
+  )
+
+  assert.equal(
+    micromark(':::a\n::: b\nc', options()),
+    '',
+    'should not close w/ a “closing” fence followed by other characters'
+  )
+
+  assert.equal(
+    micromark(':::a\n  :::\nc', options()),
+    '<p>c</p>',
+    'should close w/ an indented closing fence'
+  )
+
+  assert.equal(
+    micromark(':::a\n\t:::\nc', options()),
+    '',
+    'should not close w/ when the “closing” fence is indented at a tab size'
+  )
+
+  assert.equal(
+    micromark(':::a\n     :::\nc', options()),
+    '',
+    'should not close w/ when the “closing” fence is indented more than a tab size'
+  )
+
+  assert.equal(
+    micromark(':::a\n\n  \n\ta', options()),
+    '',
+    'should support blank lines in content'
+  )
+
+  assert.equal(
+    micromark(':::a\n\ta\n', options()),
+    '',
+    'should support an EOL EOF'
+  )
+
+  assert.equal(
+    micromark('  :::a\n  b\n  :::\nc', options()),
+    '<p>c</p>',
+    'should support an indented directive'
+  )
+
+  assert.equal(
+    micromark('  :::a\n\t:::\nc', options()),
+    '',
+    'should still not close an indented directive when the “closing” fence is indented a tab size'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n>a', options()),
+    '<blockquote>\n<p>a</p>\n</blockquote>',
+    'should support a block quote after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n```js\na', options()),
+    '<pre><code class="language-js">a\n</code></pre>\n',
+    'should support code (fenced) after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n    a', options()),
+    '<pre><code>a\n</code></pre>',
+    'should support code (indented) after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n[a]: b', options()),
+    '',
+    'should support a definition after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n# a', options()),
+    '<h1>a</h1>',
+    'should support a heading (atx) after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\na\n=', options()),
+    '<h1>a</h1>',
+    'should support a heading (setext) after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n<!-->', options()),
+    '<!-->',
+    'should support html after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n* a', options()),
+    '<ul>\n<li>a</li>\n</ul>',
+    'should support a list after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\na', options()),
+    '<p>a</p>',
+    'should support a paragraph after a container'
+  )
+
+  assert.equal(
+    micromark(':::a\n:::\n***', options()),
+    '<hr />',
+    'should support a thematic break after a container'
+  )
+
+  assert.equal(
+    micromark('>a\n:::a\nb', options()),
+    '<blockquote>\n<p>a</p>\n</blockquote>\n',
+    'should support a block quote before a container'
+  )
+
+  assert.equal(
+    micromark('```js\na\n```\n:::a\nb', options()),
+    '<pre><code class="language-js">a\n</code></pre>\n',
+    'should support code (fenced) before a container'
+  )
+
+  assert.equal(
+    micromark('    a\n:::a\nb', options()),
+    '<pre><code>a\n</code></pre>\n',
+    'should support code (indented) before a container'
+  )
+
+  assert.equal(
+    micromark('[a]: b\n:::a\nb', options()),
+    '',
+    'should support a definition before a container'
+  )
+
+  assert.equal(
+    micromark('# a\n:::a\nb', options()),
+    '<h1>a</h1>\n',
+    'should support a heading (atx) before a container'
+  )
+
+  assert.equal(
+    micromark('a\n=\n:::a\nb', options()),
+    '<h1>a</h1>\n',
+    'should support a heading (setext) before a container'
+  )
+
+  assert.equal(
+    micromark('<!-->\n:::a\nb', options()),
+    '<!-->\n',
+    'should support html before a container'
+  )
+
+  assert.equal(
+    micromark('* a\n:::a\nb', options()),
+    '<ul>\n<li>a</li>\n</ul>\n',
+    'should support a list before a container'
+  )
+
+  assert.equal(
+    micromark('a\n:::a\nb', options()),
+    '<p>a</p>\n',
+    'should support a paragraph before a container'
+  )
+
+  assert.equal(
+    micromark('***\n:::a\nb', options()),
+    '<hr />\n',
+    'should support a thematic break before a container'
+  )
+
+  assert.equal(
+    micromark(' :::x\n ', options({'*': h})),
+    '<x></x>',
+    'should support prefixed containers (1)'
+  )
+
+  assert.equal(
+    micromark(' :::x\n - a', options({'*': h})),
+    '<x>\n<ul>\n<li>a</li>\n</ul>\n</x>',
+    'should support prefixed containers (2)'
+  )
+
+  assert.equal(
+    micromark(' :::x\n - a\n > b', options({'*': h})),
+    '<x>\n<ul>\n<li>a</li>\n</ul>\n<blockquote>\n<p>b</p>\n</blockquote>\n</x>',
+    'should support prefixed containers (3)'
+  )
+
+  assert.equal(
+    micromark(' :::x\n - a\n > b\n :::', options({'*': h})),
+    '<x>\n<ul>\n<li>a</li>\n</ul>\n<blockquote>\n<p>b</p>\n</blockquote>\n</x>',
+    'should support prefixed containers (4)'
+  )
+
+  assert.equal(
+    micromark('> :::a\nb', options({'*': h})),
+    '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
+    'should not support lazyness (1)'
+  )
+
+  assert.equal(
+    micromark('> :::a\n> b\nc', options({'*': h})),
+    '<blockquote><a>\n<p>b</p>\n</a>\n</blockquote>\n<p>c</p>',
+    'should not support lazyness (2)'
+  )
+
+  assert.equal(
+    micromark('> a\n:::b', options({'*': h})),
+    '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
+    'should not support lazyness (3)'
+  )
+
+  assert.equal(
+    micromark('> :::a\n:::', options({'*': h})),
+    '<blockquote><a></a>\n</blockquote>\n<p>:::</p>',
+    'should not support lazyness (4)'
+  )
+})
+
+test('micromark-extension-directive (compile)', () => {
+  assert.equal(
     micromark(
       [
         ':abbr',
@@ -1177,7 +1176,7 @@ test('micromark-extension-directive (compile)', (t) => {
     'should support a directives (abbr)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(
       [
         'Text:',
@@ -1218,41 +1217,39 @@ test('micromark-extension-directive (compile)', (t) => {
     'should support directives (youtube)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':youtube[Cat in a box]\n:br', options({youtube, '*': h})),
     '<p><youtube>Cat in a box</youtube>\n<br></p>',
     'should support fall through directives (`*`)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':a[:img{src="x" alt=y}]{href="z"}', options({'*': h})),
     '<p><a href="z"><img src="x" alt="y"></a></p>',
     'should support fall through directives (`*`)'
   )
-
-  t.end()
 })
 
-test('content', (t) => {
-  t.equal(
+test('content', () => {
+  assert.equal(
     micromark(':abbr[x\\&y&amp;z]', options({abbr})),
     '<p><abbr>x&amp;y&amp;z</abbr></p>',
     'should support character escapes and character references in label'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[x\\[y\\]z]', options({abbr})),
     '<p><abbr>x[y]z</abbr></p>',
     'should support escaped brackets in a label'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[x[y]z]', options({abbr})),
     '<p><abbr>x[y]z</abbr></p>',
     'should support balanced brackets in a label'
   )
 
-  t.equal(
+  assert.equal(
     micromark(
       ':abbr[1[2[3[4[5[6[7[8[9[10[11[12[13[14[15[16[17[18[19[20[21[22[23[24[25[26[27[28[29[30[31[32[x]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]',
       options({abbr})
@@ -1261,7 +1258,7 @@ test('content', (t) => {
     'should support balanced brackets in a label, 32 levels deep'
   )
 
-  t.equal(
+  assert.equal(
     micromark(
       ':abbr[1[2[3[4[5[6[7[8[9[10[11[12[13[14[15[16[17[18[19[20[21[22[23[24[25[26[27[28[29[30[31[32[33[x]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]',
       options({abbr})
@@ -1270,211 +1267,209 @@ test('content', (t) => {
     'should *not* support balanced brackets in a label, 33 levels deep'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[a\nb\rc]', options({abbr})),
     '<p><abbr>a\nb\rc</abbr></p>',
     'should support EOLs in a label'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[\na\r]', options({abbr})),
     '<p><abbr>\na\r</abbr></p>',
     'should support EOLs at the edges of a label (1)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[\n]', options({abbr})),
     '<p><abbr>\n</abbr></p>',
     'should support EOLs at the edges of a label (2)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[a\n:abbr[b]\nc]', options({abbr})),
     '<p><abbr>a\n<abbr>b</abbr>\nc</abbr></p>',
     'should support EOLs around nested directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[:abbr[\n]]', options({abbr})),
     '<p><abbr><abbr>\n</abbr></abbr></p>',
     'should support EOLs inside nested directives (1)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[:abbr[a\nb]]', options({abbr})),
     '<p><abbr><abbr>a\nb</abbr></abbr></p>',
     'should support EOLs inside nested directives (2)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[:abbr[\nb\n]]', options({abbr})),
     '<p><abbr><abbr>\nb\n</abbr></abbr></p>',
     'should support EOLs inside nested directives (3)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[:abbr[\\\n]]', options({abbr})),
     '<p><abbr><abbr><br />\n</abbr></abbr></p>',
     'should support EOLs inside nested directives (4)'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr[a *b* **c** d]', options({abbr})),
     '<p><abbr>a <em>b</em> <strong>c</strong> d</abbr></p>',
     'should support markdown in a label'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr{title=a&apos;b}', options({abbr})),
     '<p><abbr title="a\'b"></abbr></p>',
     'should support character references in unquoted attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr{title="a&apos;b"}', options({abbr})),
     '<p><abbr title="a\'b"></abbr></p>',
     'should support character references in double attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(":abbr{title='a&apos;b'}", options({abbr})),
     '<p><abbr title="a\'b"></abbr></p>',
     'should support character references in single attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':abbr{title="a&somethingelse;b"}', options({abbr})),
     '<p><abbr title="a&amp;somethingelse;b"></abbr></p>',
     'should support unknown character references in attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':a{href=&param}', options({'*': h})),
     '<p><a href="&amp;param"></a></p>',
     'should not support non-terminated character references in unquoted attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':a{href="&param"}', options({'*': h})),
     '<p><a href="&amp;param"></a></p>',
     'should not support non-terminated character references in double quoted attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(":a{href='&param'}", options({'*': h})),
     '<p><a href="&amp;param"></a></p>',
     'should not support non-terminated character references in single quoted attribute values'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{a\nb}', options({'*': h})),
     '<p><span a="" b=""></span></p>',
     'should support EOLs between attributes'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{\na\n}', options({'*': h})),
     '<p><span a=""></span></p>',
     'should support EOLs at the edges of attributes'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{a\r= b}', options({'*': h})),
     '<p><span a="b"></span></p>',
     'should support EOLs before initializer'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{a=\r\nb}', options({'*': h})),
     '<p><span a="b"></span></p>',
     'should support EOLs after initializer'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{a=b\nc}', options({'*': h})),
     '<p><span a="b" c=""></span></p>',
     'should support EOLs between an unquoted attribute value and a next attribute name'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{a="b\nc"}', options({'*': h})),
     '<p><span a="b\nc"></span></p>',
     'should support EOLs in a double quoted attribute value'
   )
 
-  t.equal(
+  assert.equal(
     micromark(":span{a='b\nc'}", options({'*': h})),
     '<p><span a="b\nc"></span></p>',
     'should support EOLs in a single quoted attribute value'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{#a#b}', options({'*': h})),
     '<p><span id="b"></span></p>',
     'should support `id` shortcuts'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{id=a id="b" #c#d}', options({'*': h})),
     '<p><span id="d"></span></p>',
     'should support `id` shortcuts after `id` attributes'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{.a.b}', options({'*': h})),
     '<p><span class="a b"></span></p>',
     'should support `class` shortcuts'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':span{class=a class="b c" .d.e}', options({'*': h})),
     '<p><span class="a b c d e"></span></p>',
     'should support `class` shortcuts after `class` attributes'
   )
 
-  t.equal(
+  assert.equal(
     micromark('::::div{.big}\n:::div{.small}\nText', options({'*': h})),
     '<div class="big">\n<div class="small">\n<p>Text</p>\n</div>\n</div>',
     'should support container directives in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::div{.big}\n::hr{.small}', options({'*': h})),
     '<div class="big">\n<hr class="small">\n</div>',
     'should support leaf directives in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::div{.big}\n:b[Text]', options({'*': h})),
     '<div class="big">\n<p><b>Text</b></p>\n</div>',
     'should support text directives in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::section\n* a\n:::', options({'*': h})),
     '<section>\n<ul>\n<li>a</li>\n</ul>\n</section>',
     'should support lists in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::section[]\n* a\n:::', options({'*': h})),
     '<section>\n<ul>\n<li>a</li>\n</ul>\n</section>',
     'should support lists w/ label brackets in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::section{}\n* a\n:::', options({'*': h})),
     '<section>\n<ul>\n<li>a</li>\n</ul>\n</section>',
     'should support lists w/ attribute braces in container directives'
   )
 
-  t.equal(
+  assert.equal(
     micromark(':::i\n- +\na', options()),
     '',
     'should support lazy containers in an unclosed container directive'
   )
-
-  t.end()
 })
 
 /**