diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 96000dd6ea..c535b294ab 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -7,5 +7,7 @@ on:
 jobs:
   unit:
     uses: ./.github/workflows/_unit.yml
+  fuzz:
+    uses: ./.github/workflows/_fuzz.yml
   e2e:
     uses: ./.github/workflows/_e2e.yml
diff --git a/_develop/karma.fuzz.config.js b/_develop/karma.fuzz.config.js
index 8682cce7ab..04f705dfc4 100644
--- a/_develop/karma.fuzz.config.js
+++ b/_develop/karma.fuzz.config.js
@@ -9,5 +9,11 @@ module.exports = config => {
     frameworks: ['jasmine'],
     reporters: ['progress'],
     browsers: ['jsdom'],
+    singleRun: true,
+    browserNoActivityTimeout: 120000,
+    browserDisconnectTimeout: 120000,
+    browserDisconnectTolerance: 3,
+    browserSocketTimeout: 120000,
+    captureTimeout: 120000,
   });
 };
diff --git a/test/fuzz/editor.test.ts b/test/fuzz/editor.test.ts
index f1924c0553..c7698496cf 100644
--- a/test/fuzz/editor.test.ts
+++ b/test/fuzz/editor.test.ts
@@ -1,5 +1,5 @@
 import Delta, { AttributeMap, Op } from 'quill-delta';
-import { choose, randomInt } from './utils';
+import { choose, randomInt, runFuzz } from './utils';
 import { AlignClass } from '../../formats/align';
 import { FontClass } from '../../formats/font';
 import { SizeClass } from '../../formats/size';
@@ -214,18 +214,18 @@ const generateChange = (doc: Delta, changeCount: number) => {
 
 describe('editor', () => {
   it('setContents()', () => {
-    for (let i = 0; i < 2000; i += 1) {
+    runFuzz(() => {
       const quill = new Quill(document.createElement('div'));
       const delta = generateDocument();
 
       expect(delta.concat(new Delta().delete(1))).toEqual(
         quill.setContents(delta),
       );
-    }
+    });
   });
 
   it('updateContents()', () => {
-    for (let i = 0; i < 100; i += 1) {
+    runFuzz(() => {
       const quill = new Quill(document.createElement('div'));
       const delta = generateDocument();
       quill.setContents(delta);
@@ -236,6 +236,6 @@ describe('editor', () => {
         const diff = quill.updateContents(change);
         expect(change).toEqual(diff);
       }
-    }
+    });
   });
 });
diff --git a/test/fuzz/utils.ts b/test/fuzz/utils.ts
index 652580e2f3..fdc761e4d4 100644
--- a/test/fuzz/utils.ts
+++ b/test/fuzz/utils.ts
@@ -5,3 +5,10 @@ export function randomInt(max: number) {
 export function choose<T>(choices: T[]): T {
   return choices[randomInt(choices.length)];
 }
+
+export function runFuzz(testCase: () => void) {
+  const start = performance.now();
+  do {
+    testCase();
+  } while (performance.now() - start > 30 * 1000);
+}