diff --git a/lib/assert.js b/lib/assert.js
index 376f4b732001bc..ffa71bfad8d412 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -203,8 +203,27 @@ function getCode(fd, line, column) {
 function parseCode(code, offset) {
   // Lazy load acorn.
   if (parseExpressionAt === undefined) {
-    ({ parseExpressionAt } = require('internal/deps/acorn/acorn/dist/acorn'));
+    const acorn = require('internal/deps/acorn/acorn/dist/acorn');
+    const privateMethods =
+      require('internal/deps/acorn-plugins/acorn-private-methods/index');
+    const bigInt = require('internal/deps/acorn-plugins/acorn-bigint/index');
+    const classFields =
+      require('internal/deps/acorn-plugins/acorn-class-fields/index');
+    const numericSeparator =
+      require('internal/deps/acorn-plugins/acorn-numeric-separator/index');
+    const staticClassFeatures =
+      require('internal/deps/acorn-plugins/acorn-static-class-features/index');
+
     ({ findNodeAround } = require('internal/deps/acorn/acorn-walk/dist/walk'));
+
+    const Parser = acorn.Parser.extend(
+      privateMethods,
+      bigInt,
+      classFields,
+      numericSeparator,
+      staticClassFeatures
+    );
+    parseExpressionAt = Parser.parseExpressionAt.bind(Parser);
   }
   let node;
   let start = 0;