diff --git a/frontend/src/ts/config.ts b/frontend/src/ts/config.ts
index 493f4be06..a161b2ed9 100644
--- a/frontend/src/ts/config.ts
+++ b/frontend/src/ts/config.ts
@@ -33,6 +33,7 @@ import { migrateConfig } from "./utils/config";
 import { roundTo1 } from "@monkeytype/util/numbers";
 import { getDefaultConfig } from "./constants/default-config";
 import { parseWithSchema as parseJsonWithSchema } from "@monkeytype/util/json";
+import * as TestState from "./test/test-state";
 
 const configLS = new LocalStorageWithSchema({
   key: "config",
@@ -91,8 +92,20 @@ export function saveFullConfigToLocalStorage(noDbCheck = false): void {
   ConfigEvent.dispatch("saveToLocalStorage", stringified);
 }
 
+function isConfigChangeBlocked(): boolean {
+  if (TestState.isActive && config.funbox.includes("no_quit")) {
+    Notifications.add("No quit funbox is active. Please finish the test.", 0, {
+      important: true,
+    });
+    return true;
+  }
+  return false;
+}
+
 //numbers
 export function setNumbers(numb: boolean, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValidBoolean("numbers", numb)) return false;
 
   if (!canSetConfigWithCurrentFunboxes("numbers", numb, config.funbox)) {
@@ -111,6 +124,8 @@ export function setNumbers(numb: boolean, nosave?: boolean): boolean {
 
 //punctuation
 export function setPunctuation(punc: boolean, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValidBoolean("punctuation", punc)) return false;
 
   if (!canSetConfigWithCurrentFunboxes("punctuation", punc, config.funbox)) {
@@ -128,6 +143,8 @@ export function setPunctuation(punc: boolean, nosave?: boolean): boolean {
 }
 
 export function setMode(mode: Mode, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("mode", mode, ModeSchema)) {
     return false;
   }
@@ -224,6 +241,8 @@ export function setDifficulty(
   diff: ConfigSchemas.Difficulty,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("difficulty", diff, ConfigSchemas.DifficultySchema)) {
     return false;
   }
@@ -260,6 +279,8 @@ export function setFunbox(
   funbox: ConfigSchemas.Funbox,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("funbox", funbox, ConfigSchemas.FunboxSchema))
     return false;
 
@@ -277,6 +298,8 @@ export function setFunbox(
 }
 
 export function toggleFunbox(funbox: FunboxName, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!canSetFunboxWithConfig(funbox, config)) {
     return false;
   }
@@ -346,6 +369,8 @@ export function setStopOnError(
   soe: ConfigSchemas.StopOnError,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (
     !isConfigValueValid("stop on error", soe, ConfigSchemas.StopOnErrorSchema)
   ) {
@@ -484,6 +509,8 @@ export function setMinWpm(
   minwpm: ConfigSchemas.MinimumWordsPerMinute,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (
     !isConfigValueValid(
       "min speed",
@@ -505,6 +532,8 @@ export function setMinWpmCustomSpeed(
   val: ConfigSchemas.MinWpmCustomSpeed,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (
     !isConfigValueValid(
       "min speed custom",
@@ -527,6 +556,8 @@ export function setMinAcc(
   min: ConfigSchemas.MinimumAccuracy,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("min acc", min, ConfigSchemas.MinimumAccuracySchema))
     return false;
 
@@ -541,6 +572,8 @@ export function setMinAccCustom(
   val: ConfigSchemas.MinimumAccuracyCustom,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   //migrate legacy configs
   if (val > 100) val = 100;
   if (
@@ -564,6 +597,8 @@ export function setMinBurst(
   min: ConfigSchemas.MinimumBurst,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("min burst", min, ConfigSchemas.MinimumBurstSchema)) {
     return false;
   }
@@ -579,6 +614,8 @@ export function setMinBurstCustomSpeed(
   val: ConfigSchemas.MinimumBurstCustomSpeed,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (
     !isConfigValueValid(
       "min burst custom speed",
@@ -732,6 +769,8 @@ export function setColorfulMode(extra: boolean, nosave?: boolean): boolean {
 
 //strict space
 export function setStrictSpace(val: boolean, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValidBoolean("strict space", val)) return false;
 
   config.strictSpace = val;
@@ -1087,6 +1126,8 @@ export function setTimeConfig(
   time: ConfigSchemas.TimeConfig,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   time = isNaN(time) || time < 0 ? getDefaultConfig().time : time;
   if (!isConfigValueValid("time", time, ConfigSchemas.TimeConfigSchema))
     return false;
@@ -1107,6 +1148,8 @@ export function setQuoteLength(
   nosave?: boolean,
   multipleMode?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (Array.isArray(len)) {
     if (
       !isConfigValueValid(
@@ -1159,6 +1202,8 @@ export function setWordCount(
   wordCount: ConfigSchemas.WordCount,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   wordCount =
     wordCount < 0 || wordCount > 100000 ? getDefaultConfig().words : wordCount;
 
@@ -1501,6 +1546,8 @@ export function setRandomTheme(
 }
 
 export function setBritishEnglish(val: boolean, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValidBoolean("british english", val)) return false;
 
   if (!val) {
@@ -1514,6 +1561,8 @@ export function setBritishEnglish(val: boolean, nosave?: boolean): boolean {
 }
 
 export function setLazyMode(val: boolean, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValidBoolean("lazy mode", val)) return false;
 
   if (!val) {
@@ -1566,6 +1615,8 @@ export function setCustomThemeColors(
 }
 
 export function setLanguage(language: Language, nosave?: boolean): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("language", language, LanguageSchema)) return false;
 
   config.language = language;
@@ -1743,6 +1794,8 @@ export function setLayout(
   layout: ConfigSchemas.Layout,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   if (!isConfigValueValid("layout", layout, ConfigSchemas.LayoutSchema))
     return false;
 
@@ -1850,6 +1903,8 @@ export function setCustomLayoutfluid(
   value: ConfigSchemas.CustomLayoutFluid,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   // Remove duplicates
   const deduped = Array.from(new Set(value));
   if (
@@ -1873,6 +1928,8 @@ export function setCustomPolyglot(
   value: ConfigSchemas.CustomPolyglot,
   nosave?: boolean
 ): boolean {
+  if (isConfigChangeBlocked()) return false;
+
   // remove duplicates
   const deduped = Array.from(new Set(value));
   if (
diff --git a/frontend/src/ts/controllers/route-controller.ts b/frontend/src/ts/controllers/route-controller.ts
index e1a5b53ab..6102b8c7a 100644
--- a/frontend/src/ts/controllers/route-controller.ts
+++ b/frontend/src/ts/controllers/route-controller.ts
@@ -2,6 +2,9 @@ import * as PageController from "./page-controller";
 import * as TestUI from "../test/test-ui";
 import * as PageTransition from "../states/page-transition";
 import { Auth, isAuthenticated } from "../firebase";
+import { isFunboxActive } from "../test/funbox/list";
+import * as TestState from "../test/test-state";
+import * as Notifications from "../elements/notifications";
 
 //source: https://www.youtube.com/watch?v=OstALBk-jTc
 // https://www.youtube.com/watch?v=OstALBk-jTc
@@ -157,6 +160,16 @@ export function navigate(
     );
     return;
   }
+
+  const noQuit = isFunboxActive("no_quit");
+  if (TestState.isActive && noQuit) {
+    Notifications.add("No quit funbox is active. Please finish the test.", 0, {
+      important: true,
+    });
+    event?.preventDefault();
+    return;
+  }
+
   url = url.replace(/\/$/, "");
   if (url === "") url = "/";
 
diff --git a/frontend/src/ts/test/funbox/list.ts b/frontend/src/ts/test/funbox/list.ts
index f54fe305c..609527d05 100644
--- a/frontend/src/ts/test/funbox/list.ts
+++ b/frontend/src/ts/test/funbox/list.ts
@@ -89,6 +89,15 @@ export function isFunboxActiveWithProperty(property: FunboxProperty): boolean {
   return getActiveFunboxesWithProperty(property).length > 0;
 }
 
+/**
+ * Check if the given funbox is active
+ * @param funbox funbox name
+ * @returns true if the funbox is active, false otherwise
+ */
+export function isFunboxActive(funbox: FunboxName): boolean {
+  return getActiveFunboxNames().includes(funbox);
+}
+
 type MandatoryFunboxFunction<F extends keyof FunboxFunctions> = Exclude<
   FunboxFunctions[F],
   undefined
diff --git a/frontend/src/ts/test/test-logic.ts b/frontend/src/ts/test/test-logic.ts
index 54127eb28..3c810f2c1 100644
--- a/frontend/src/ts/test/test-logic.ts
+++ b/frontend/src/ts/test/test-logic.ts
@@ -69,6 +69,7 @@ import {
   findSingleActiveFunboxWithFunction,
   getActiveFunboxes,
   getActiveFunboxesWithFunction,
+  isFunboxActive,
 } from "./funbox/list";
 import { getFunbox } from "@monkeytype/funbox";
 import * as CompositionState from "../states/composition";
@@ -163,6 +164,15 @@ export function restart(options = {} as RestartOptions): void {
   options = { ...defaultOptions, ...options };
   const animationTime = options.noAnim ? 0 : Misc.applyReducedMotion(125);
 
+  const noQuit = isFunboxActive("no_quit");
+  if (TestState.isActive && noQuit) {
+    Notifications.add("No quit funbox is active. Please finish the test.", 0, {
+      important: true,
+    });
+    event?.preventDefault();
+    return;
+  }
+
   if (TestUI.testRestarting || TestUI.resultCalculating) {
     event?.preventDefault();
     return;
@@ -1402,18 +1412,20 @@ $(".pageTest").on("click", "#testConfig .mode .textButton", (e) => {
   if ($(e.currentTarget).hasClass("active")) return;
   const mode = ($(e.currentTarget).attr("mode") ?? "time") as Mode;
   if (mode === undefined) return;
-  UpdateConfig.setMode(mode);
-  ManualRestart.set();
-  restart();
+  if (UpdateConfig.setMode(mode)) {
+    ManualRestart.set();
+    restart();
+  }
 });
 
 $(".pageTest").on("click", "#testConfig .wordCount .textButton", (e) => {
   if (TestUI.testRestarting) return;
   const wrd = $(e.currentTarget).attr("wordCount") ?? "15";
   if (wrd !== "custom") {
-    UpdateConfig.setWordCount(parseInt(wrd));
-    ManualRestart.set();
-    restart();
+    if (UpdateConfig.setWordCount(parseInt(wrd))) {
+      ManualRestart.set();
+      restart();
+    }
   }
 });
 
@@ -1421,9 +1433,10 @@ $(".pageTest").on("click", "#testConfig .time .textButton", (e) => {
   if (TestUI.testRestarting) return;
   const mode = $(e.currentTarget).attr("timeConfig") ?? "10";
   if (mode !== "custom") {
-    UpdateConfig.setTimeConfig(parseInt(mode));
-    ManualRestart.set();
-    restart();
+    if (UpdateConfig.setTimeConfig(parseInt(mode))) {
+      ManualRestart.set();
+      restart();
+    }
   }
 });
 
@@ -1436,24 +1449,27 @@ $(".pageTest").on("click", "#testConfig .quoteLength .textButton", (e) => {
     if (len === -1) {
       len = [0, 1, 2, 3];
     }
-    UpdateConfig.setQuoteLength(len, false, e.shiftKey);
-    ManualRestart.set();
-    restart();
+    if (UpdateConfig.setQuoteLength(len, false, e.shiftKey)) {
+      ManualRestart.set();
+      restart();
+    }
   }
 });
 
 $(".pageTest").on("click", "#testConfig .punctuationMode.textButton", () => {
   if (TestUI.testRestarting) return;
-  UpdateConfig.setPunctuation(!Config.punctuation);
-  ManualRestart.set();
-  restart();
+  if (UpdateConfig.setPunctuation(!Config.punctuation)) {
+    ManualRestart.set();
+    restart();
+  }
 });
 
 $(".pageTest").on("click", "#testConfig .numbersMode.textButton", () => {
   if (TestUI.testRestarting) return;
-  UpdateConfig.setNumbers(!Config.numbers);
-  ManualRestart.set();
-  restart();
+  if (UpdateConfig.setNumbers(!Config.numbers)) {
+    ManualRestart.set();
+    restart();
+  }
 });
 
 $("header").on("click", "nav #startTestButton, #logo", () => {
diff --git a/packages/contracts/src/schemas/configs.ts b/packages/contracts/src/schemas/configs.ts
index e0fd29734..08fda8157 100644
--- a/packages/contracts/src/schemas/configs.ts
+++ b/packages/contracts/src/schemas/configs.ts
@@ -287,6 +287,7 @@ export const FunboxNameSchema = z.enum([
   "ALL_CAPS",
   "polyglot",
   "asl",
+  "no_quit",
 ]);
 export type FunboxName = z.infer<typeof FunboxNameSchema>;
 
diff --git a/packages/funbox/src/list.ts b/packages/funbox/src/list.ts
index 762052952..8d7cf4693 100644
--- a/packages/funbox/src/list.ts
+++ b/packages/funbox/src/list.ts
@@ -461,6 +461,12 @@ const list: Record<FunboxName, FunboxMetadata> = {
     name: "asl",
     cssModifications: ["words"],
   },
+  no_quit: {
+    description: "You can't restart the test.",
+    canGetPb: true,
+    difficultyLevel: 0,
+    name: "no_quit",
+  },
 };
 
 export function getFunbox(name: FunboxName): FunboxMetadata;