diff --git a/lib/cli/config.js b/lib/cli/config.js
index dd8f987ca1..3691f0a079 100644
--- a/lib/cli/config.js
+++ b/lib/cli/config.js
@@ -9,7 +9,7 @@
  */
 
 const fs = require('fs');
-const findUp = require('findup-sync');
+const findUp = require('find-up');
 const path = require('path');
 const debug = require('debug')('mocha:cli:config');
 
@@ -72,7 +72,7 @@ exports.loadConfig = filepath => {
  * @returns {string|null} Filepath to config, if found
  */
 exports.findConfig = (cwd = process.cwd()) => {
-  const filepath = findUp(exports.CONFIG_FILES, {cwd});
+  const filepath = findUp.sync(exports.CONFIG_FILES, {cwd});
   if (filepath) {
     debug(`found config at ${filepath}`);
   }
diff --git a/lib/cli/options.js b/lib/cli/options.js
index 5ec8ff0ebf..a033c39ac7 100644
--- a/lib/cli/options.js
+++ b/lib/cli/options.js
@@ -13,7 +13,7 @@ const {ONE_AND_DONE_ARGS} = require('./one-and-dones');
 const mocharc = require('../mocharc.json');
 const {list} = require('./run-helpers');
 const {loadConfig, findConfig} = require('./config');
-const findup = require('findup-sync');
+const findUp = require('find-up');
 const {deprecate} = require('../utils');
 const debug = require('debug')('mocha:cli:options');
 const {createMissingArgumentError} = require('../errors');
@@ -255,7 +255,7 @@ const loadPkgRc = (args = {}) => {
     return result;
   }
   result = {};
-  const filepath = args.package || findup(mocharc.package);
+  const filepath = args.package || findUp.sync(mocharc.package);
   if (filepath) {
     try {
       const pkg = JSON.parse(fs.readFileSync(filepath, 'utf8'));
diff --git a/test/node-unit/cli/config.spec.js b/test/node-unit/cli/config.spec.js
index d5d64ee593..eeb4bb2b82 100644
--- a/test/node-unit/cli/config.spec.js
+++ b/test/node-unit/cli/config.spec.js
@@ -109,12 +109,12 @@ describe('cli/config', function() {
     let findConfig;
 
     beforeEach(function() {
-      findup = sandbox.stub().returns('/some/path/.mocharc.js');
+      findup = {sync: sandbox.stub().returns('/some/path/.mocharc.js')};
       rewiremock.enable();
       findConfig = rewiremock.proxy(
         require.resolve('../../../lib/cli/config'),
         r => ({
-          'findup-sync': r.by(() => findup)
+          'find-up': r.by(() => findup)
         })
       ).findConfig;
     });
diff --git a/test/node-unit/cli/options.spec.js b/test/node-unit/cli/options.spec.js
index b849db5ab3..3438a5564f 100644
--- a/test/node-unit/cli/options.spec.js
+++ b/test/node-unit/cli/options.spec.js
@@ -10,14 +10,16 @@ const configPath = require.resolve('../../../lib/cli/config');
 
 const proxyLoadOptions = ({
   readFileSync = {},
-  findupSync = {},
+  findupSync = null,
   findConfig = {},
   loadConfig = {}
 } = {}) =>
   rewiremock.proxy(modulePath, r => ({
     fs: r.with({readFileSync}).directChildOnly(),
     [mocharcPath]: defaults,
-    'findup-sync': r.by(() => findupSync).directChildOnly(),
+    'find-up': r
+      .by(() => (findupSync ? {sync: findupSync} : {}))
+      .directChildOnly(),
     [configPath]: r.with({findConfig, loadConfig}).directChildOnly()
   })).loadOptions;