diff --git a/test/specs/gfm/gfm.0.28.json b/test/specs/gfm/gfm.0.29.json
similarity index 85%
rename from test/specs/gfm/gfm.0.28.json
rename to test/specs/gfm/gfm.0.29.json
index 75bffc64ce..28ffd8b97e 100644
--- a/test/specs/gfm/gfm.0.28.json
+++ b/test/specs/gfm/gfm.0.29.json
@@ -1,153 +1,147 @@
 [
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>foo</th>\n<th>bar</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>baz</td>\n<td>bim</td>\n</tr></tbody></table>",
+    "html": "<table>\n<thead>\n<tr>\n<th>foo</th>\n<th>bar</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>baz</td>\n<td>bim</td>\n</tr>\n</tbody>\n</table>",
     "markdown": "| foo | bar |\n| --- | --- |\n| baz | bim |",
-    "example": 191
+    "example": "198"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th align=\"center\">abc</th>\n<th align=\"right\">defghi</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td align=\"center\">bar</td>\n<td align=\"right\">baz</td>\n</tr></tbody></table>",
+    "html": "<table>\n<thead>\n<tr>\n<th align=\"center\">abc</th>\n<th align=\"right\">defghi</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td align=\"center\">bar</td>\n<td align=\"right\">baz</td>\n</tr>\n</tbody>\n</table>",
     "markdown": "| abc | defghi |\n:-: | -----------:\nbar | baz",
-    "example": 192
+    "example": "199"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>f|oo</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b <code>|</code> az</td>\n</tr>\n<tr>\n<td>b <strong>|</strong> im</td>\n</tr></tbody></table>",
+    "html": "<table>\n<thead>\n<tr>\n<th>f|oo</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b <code>|</code> az</td>\n</tr>\n<tr>\n<td>b <strong>|</strong> im</td>\n</tr>\n</tbody>\n</table>",
     "markdown": "| f\\|oo  |\n| ------ |\n| b `\\|` az |\n| b **\\|** im |",
-    "example": 193
+    "example": "200"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr></tbody></table>\n<blockquote>\n<p>bar</p>\n</blockquote>",
+    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr>\n</tbody>\n</table>\n<blockquote>\n<p>bar</p>\n</blockquote>",
     "markdown": "| abc | def |\n| --- | --- |\n| bar | baz |\n> bar",
-    "example": 194
+    "example": "201"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr>\n<tr>\n<td>bar</td>\n<td></td>\n</tr></tbody></table>\n<p>bar</p>",
+    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr>\n<tr>\n<td>bar</td>\n<td></td>\n</tr>\n</tbody>\n</table>\n<p>bar</p>",
     "markdown": "| abc | def |\n| --- | --- |\n| bar | baz |\nbar\n\nbar",
-    "example": 195
+    "example": "202"
   },
   {
     "section": "Tables",
     "html": "<p>| abc | def |\n| --- |\n| bar |</p>",
     "markdown": "| abc | def |\n| --- |\n| bar |",
-    "example": 196
+    "example": "203"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td></td>\n</tr>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr></tbody></table>",
+    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>bar</td>\n<td></td>\n</tr>\n<tr>\n<td>bar</td>\n<td>baz</td>\n</tr>\n</tbody>\n</table>",
     "markdown": "| abc | def |\n| --- | --- |\n| bar |\n| bar | baz | boo |",
-    "example": 197
+    "example": "204"
   },
   {
     "section": "Tables",
-    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead></table>",
+    "html": "<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n</table>",
     "markdown": "| abc | def |\n| --- | --- |",
-    "example": 198
+    "example": "205"
   },
   {
     "section": "Task list items",
     "html": "<ul>\n<li><input disabled=\"\" type=\"checkbox\"> foo</li>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> bar</li>\n</ul>",
     "markdown": "- [ ] foo\n- [x] bar",
-    "example": 272
+    "example": "279"
   },
   {
     "section": "Task list items",
     "html": "<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo\n<ul>\n<li><input disabled=\"\" type=\"checkbox\"> bar</li>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> baz</li>\n</ul>\n</li>\n<li><input disabled=\"\" type=\"checkbox\"> bim</li>\n</ul>",
     "markdown": "- [x] foo\n  - [ ] bar\n  - [x] baz\n- [ ] bim",
-    "example": 273
+    "example": "280"
   },
   {
     "section": "Strikethrough",
     "html": "<p><del>Hi</del> Hello, world!</p>",
-    "markdown": "~Hi~ Hello, world!",
-    "example": 469
-  },
-  {
-    "section": "Strikethrough",
-    "html": "<p>This <del>text</del> is <del>curious</del>.</p>",
-    "markdown": "This ~text~~~~ is ~~~~curious~.",
-    "example": 470
+    "markdown": "~~Hi~~ Hello, world!",
+    "example": "491"
   },
   {
     "section": "Strikethrough",
     "html": "<p>This ~~has a</p>\n<p>new paragraph~~.</p>",
     "markdown": "This ~~has a\n\nnew paragraph~~.",
-    "example": 471
+    "example": "492"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://www.commonmark.org\">www.commonmark.org</a></p>",
     "markdown": "www.commonmark.org",
-    "example": 597
+    "example": "621"
   },
   {
     "section": "Autolinks",
     "html": "<p>Visit <a href=\"http://www.commonmark.org/help\">www.commonmark.org/help</a> for more information.</p>",
     "markdown": "Visit www.commonmark.org/help for more information.",
-    "example": 598
+    "example": "622"
   },
   {
     "section": "Autolinks",
     "html": "<p>Visit <a href=\"http://www.commonmark.org\">www.commonmark.org</a>.</p>\n<p>Visit <a href=\"http://www.commonmark.org/a.b\">www.commonmark.org/a.b</a>.</p>",
     "markdown": "Visit www.commonmark.org.\n\nVisit www.commonmark.org/a.b.",
-    "example": 599
+    "example": "623"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://www.google.com/search?q=Markup+(business)\">www.google.com/search?q=Markup+(business)</a></p>\n<p>(<a href=\"http://www.google.com/search?q=Markup+(business)\">www.google.com/search?q=Markup+(business)</a>)</p>",
     "markdown": "www.google.com/search?q=Markup+(business)\n\n(www.google.com/search?q=Markup+(business))",
-    "example": 600
+    "example": "624"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://www.google.com/search?q=(business))+ok\">www.google.com/search?q=(business))+ok</a></p>",
     "markdown": "www.google.com/search?q=(business))+ok",
-    "example": 601
+    "example": "625"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://www.google.com/search?q=commonmark&amp;hl=en\">www.google.com/search?q=commonmark&amp;hl=en</a></p>\n<p><a href=\"http://www.google.com/search?q=commonmark\">www.google.com/search?q=commonmark</a>&amp;hl;</p>",
     "markdown": "www.google.com/search?q=commonmark&hl=en\n\nwww.google.com/search?q=commonmark&hl;",
-    "example": 602
+    "example": "626"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://www.commonmark.org/he\">www.commonmark.org/he</a>&lt;lp</p>",
     "markdown": "www.commonmark.org/he<lp",
-    "example": 603
+    "example": "627"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"http://commonmark.org\">http://commonmark.org</a></p>\n<p>(Visit <a href=\"https://encrypted.google.com/search?q=Markup+(business)\">https://encrypted.google.com/search?q=Markup+(business)</a>)</p>\n<p>Anonymous FTP is available at <a href=\"ftp://foo.bar.baz\">ftp://foo.bar.baz</a>.</p>",
     "markdown": "http://commonmark.org\n\n(Visit https://encrypted.google.com/search?q=Markup+(business))\n\nAnonymous FTP is available at ftp://foo.bar.baz.",
-    "example": 604
+    "example": "628"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"mailto:foo@bar.baz\">foo@bar.baz</a></p>",
     "markdown": "foo@bar.baz",
-    "example": 605
+    "example": "629"
   },
   {
     "section": "Autolinks",
     "html": "<p>hello@mail+xyz.example isn't valid, but <a href=\"mailto:hello+xyz@mail.example\">hello+xyz@mail.example</a> is.</p>",
     "markdown": "hello@mail+xyz.example isn't valid, but hello+xyz@mail.example is.",
-    "example": 606
+    "example": "630"
   },
   {
     "section": "Autolinks",
     "html": "<p><a href=\"mailto:a.b-c_d@a.b\">a.b-c_d@a.b</a></p>\n<p><a href=\"mailto:a.b-c_d@a.b\">a.b-c_d@a.b</a>.</p>\n<p>a.b-c_d@a.b-</p>\n<p>a.b-c_d@a.b_</p>",
     "markdown": "a.b-c_d@a.b\n\na.b-c_d@a.b.\n\na.b-c_d@a.b-\n\na.b-c_d@a.b_",
-    "example": 607
+    "example": "631"
   },
   {
     "section": "Disallowed Raw HTML",
     "html": "<p><strong> &lt;title> &lt;style> <em></p>\n<blockquote>\n  &lt;xmp> is disallowed.  &lt;XMP> is also disallowed.\n</blockquote>",
     "markdown": "<strong> <title> <style> <em>\n\n<blockquote>\n  <xmp> is disallowed.  <XMP> is also disallowed.\n</blockquote>",
-    "example": 629,
+    "example": "653",
     "shouldFail": true
   }
 ]
diff --git a/test/specs/run-spec.js b/test/specs/run-spec.js
index 56a3f70a49..3af0aa4565 100644
--- a/test/specs/run-spec.js
+++ b/test/specs/run-spec.js
@@ -48,5 +48,5 @@ function runSpecs(title, file, options) {
   });
 };
 
-runSpecs('GFM 0.28', './gfm/gfm.0.28.json', {gfm: true});
+runSpecs('GFM 0.29', './gfm/gfm.0.29.json', {gfm: true});
 runSpecs('CommonMark 0.29', './commonmark/commonmark.0.29.json', {headerIds: false});