diff --git a/client/gatsby-node.js b/client/gatsby-node.js
index 008208d441..3bc54eacca 100644
--- a/client/gatsby-node.js
+++ b/client/gatsby-node.js
@@ -229,7 +229,7 @@ exports.onCreateWebpackConfig = ({ stage, actions }) => {
         path: require.resolve('path-browserify'),
         assert: require.resolve('assert'),
         crypto: require.resolve('crypto-browserify'),
-        util: false,
+        util: require.resolve('util/util'),
         buffer: require.resolve('buffer'),
         stream: require.resolve('stream-browserify'),
         process: require.resolve('process/browser')
diff --git a/client/package.json b/client/package.json
index 0e0a549def..0601c2c401 100644
--- a/client/package.json
+++ b/client/package.json
@@ -124,6 +124,7 @@
     "stream-browserify": "3.0.0",
     "tone": "14.7.77",
     "typescript": "4.5.5",
+    "util": "^0.12.4",
     "uuid": "8.3.2",
     "validator": "13.7.0"
   },
diff --git a/client/src/client/workers/test-evaluator.ts b/client/src/client/workers/test-evaluator.ts
index d7592b1ea5..589292d02d 100644
--- a/client/src/client/workers/test-evaluator.ts
+++ b/client/src/client/workers/test-evaluator.ts
@@ -25,6 +25,7 @@ const __utils = (() => {
 
   const oldLog = ctx.console.log.bind(ctx.console);
   function proxyLog(...args: string[]) {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-return
     logs.push(args.map(arg => __format(arg)).join(' '));
     if (logs.join('\n').length > MAX_LOGS_SIZE) {
       flushLogs();
diff --git a/client/src/utils/format.js b/client/src/utils/format.js
index 3cf2049750..ecdba273b3 100644
--- a/client/src/utils/format.js
+++ b/client/src/utils/format.js
@@ -1,4 +1,4 @@
-import { inspect } from 'util';
+import { inspect } from 'util/util';
 
 export function format(x) {
   // we're trying to mimic console.log, so we avoid wrapping strings in quotes:
@@ -10,6 +10,10 @@ export function format(x) {
       x.entries(),
       ([k, v]) => `${k} => ${v}`
     ).join(', ')}})`;
+  } else if (typeof x === 'bigint') {
+    return x.toString() + 'n';
+  } else if (typeof x === 'symbol') {
+    return x.toString();
   }
   return inspect(x);
 }
diff --git a/client/src/utils/format.test.ts b/client/src/utils/format.test.ts
index 2856010f46..f00eaa34fc 100644
--- a/client/src/utils/format.test.ts
+++ b/client/src/utils/format.test.ts
@@ -35,17 +35,17 @@ describe('format', () => {
     const primitives = [
       'str',
       57,
-      BigInt(10),
       true,
       false,
       null,
       // eslint-disable-next-line no-undefined
-      undefined,
-      Symbol('Sym')
+      undefined
     ];
     expect(format(primitives)).toBe(
-      `[ 'str', 57, 10n, true, false, null, undefined, Symbol(Sym) ]`
+      `[ 'str', 57, true, false, null, undefined ]`
     );
+    expect(format(BigInt(10))).toBe(`10n`);
+    expect(format(Symbol('Sym'))).toBe(`Symbol(Sym)`);
   });
   it(`outputs NaN as 'NaN'`, () => {
     expect(format(NaN)).toBe('NaN');