diff --git a/lib/extend/tag.js b/lib/extend/tag.js
index 701802bb62..778f3548df 100644
--- a/lib/extend/tag.js
+++ b/lib/extend/tag.js
@@ -4,9 +4,8 @@ const { stripIndent } = require('hexo-util');
 const { cyan } = require('chalk');
 const { Environment } = require('nunjucks');
 const Promise = require('bluebird');
-const placeholder = '\uFFFC';
-const rPlaceholder = /<!--\uFFFC(\d+)-->/g;
 const rSwigRawFullBlock = /{% *raw *%}[\s\S]+{% *endraw *%}/;
+const escapeSwigTag = str => str.replace(/{/g, '&#123;').replace(/}/g, '&#125;');
 
 class NunjucksTag {
   constructor(name, fn) {
@@ -229,20 +228,15 @@ class Tag {
       options = {};
     }
 
-    const cache = [];
-
-    const escapeContent = str => {
+    str = str.replace(/<code[^<>]*>[\s\S]+?<\/code>/gm, str => {
       // https://hexo.io/docs/tag-plugins#Raw
       // Only escape code block when there is no raw tag included
       if (rSwigRawFullBlock.test(str)) return str;
-      return `<!--${placeholder}${cache.push(str) - 1}-->`;
-    };
-
-    str = str.replace(/<code[^<>]*>[\s\S]+?<\/code>/gm, escapeContent);
+      return escapeSwigTag(str);
+    });
 
     return Promise.fromCallback(cb => { this.env.renderString(str, options, cb); })
       .catch(err => Promise.reject(formatNunjucksError(err, str)))
-      .then(result => result.replace(rPlaceholder, (_, index) => cache[index]))
       .asCallback(callback);
   }
 }
diff --git a/test/scripts/hexo/post.js b/test/scripts/hexo/post.js
index 42dd113e2b..67f97c55f0 100644
--- a/test/scripts/hexo/post.js
+++ b/test/scripts/hexo/post.js
@@ -8,6 +8,7 @@ const { highlight, escapeHTML } = require('hexo-util');
 const { spy, useFakeTimers } = require('sinon');
 const frontMatter = require('hexo-front-matter');
 const fixture = require('../../fixtures/post_render');
+const escapeSwigTag = str => str.replace(/{/g, '&#123;').replace(/}/g, '&#125;');
 
 describe('Post', () => {
   const Hexo = require('../../../lib/hexo');
@@ -1015,7 +1016,7 @@ describe('Post', () => {
       engine: 'markdown'
     });
 
-    data.content.trim().should.eql('<p>In Go’s templates, blocks look like this: <code>{{block "template name" .}} (content) {{end}}</code>.</p>');
+    data.content.trim().should.eql(`<p>In Go’s templates, blocks look like this: <code>${escapeSwigTag('{{block "template name" .}} (content) {{end}}')}</code>.</p>`);
   });
 
   // test for https://github.com/hexojs/hexo/issues/3346#issuecomment-595497849
@@ -1027,7 +1028,7 @@ describe('Post', () => {
       engine: 'markdown'
     });
 
-    data.content.trim().should.eql('<p><code>{{ 1 + 1 }}</code> 2</p>');
+    data.content.trim().should.eql(`<p><code>${escapeSwigTag('{{ 1 + 1 }}')}</code> 2</p>`);
   });
 
   // https://github.com/hexojs/hexo/issues/4317
@@ -1099,7 +1100,7 @@ describe('Post', () => {
     });
 
     data.content.trim().should.eql([
-      '<p><code>{{ 1 + 1 }}</code> 3 <code>{{ 2 + 2 }}</code><br>Text</p>',
+      `<p><code>${escapeSwigTag('{{ 1 + 1 }}')}</code> 3 <code>${escapeSwigTag('{{ 2 + 2 }}')}</code><br>Text</p>`,
       '',
       'Raw 1',
       '',
@@ -1136,13 +1137,13 @@ describe('Post', () => {
     });
 
     // indented pullquote
-    data.content.trim().should.contains('<pre><code>{% pullquote %}foo foo foo{% endpullquote %}</code></pre>');
+    data.content.trim().should.contains(`<pre><code>${escapeSwigTag('{% pullquote %}foo foo foo{% endpullquote %}')}</code></pre>`);
     data.content.trim().should.contains('<p>test001</p>');
     // pullquote tag
     data.content.trim().should.contains('<blockquote class="pullquote"><p>bar bar bar</p>\n</blockquote>');
     data.content.trim().should.contains('<p>test002</p>');
     // indented youtube tag
-    data.content.trim().should.contains('<pre><code>{% youtube https://example.com/demo.mp4 %}</code></pre>');
+    data.content.trim().should.contains(`<pre><code>${escapeSwigTag('{% youtube https://example.com/demo.mp4 %}')}</code></pre>`);
     // youtube tag
     data.content.trim().should.contains('<div class="video-container"><iframe src="https://www.youtube.com/embed/https://example.com/sample.mp4" frameborder="0" loading="lazy" allowfullscreen></iframe></div>');
   });