diff --git a/bin/mocha b/bin/mocha
index d19d71ffcc..79d35562d4 100755
--- a/bin/mocha
+++ b/bin/mocha
@@ -36,8 +36,6 @@ const disableTimeouts = value => {
   if (impliesNoTimeouts(value)) {
     debug('option %s disabled timeouts', value);
     mochaArgs.timeout = 0;
-    delete mochaArgs.timeouts;
-    delete mochaArgs.t;
   }
 };
 
@@ -93,7 +91,6 @@ if (mochaArgs.require && mochaArgs.require.includes('esm')) {
   if (!mochaArgs.require.length) {
     delete mochaArgs.require;
   }
-  delete mochaArgs.r;
 }
 
 if (Object.keys(nodeArgs).length) {
diff --git a/lib/cli/options.js b/lib/cli/options.js
index 1ffa000398..95428c4f96 100644
--- a/lib/cli/options.js
+++ b/lib/cli/options.js
@@ -38,7 +38,8 @@ const {isNodeFlag} = require('./node-flags');
 const YARGS_PARSER_CONFIG = {
   'combine-arrays': true,
   'short-option-groups': false,
-  'dot-notation': false
+  'dot-notation': false,
+  'strip-aliased': true
 };
 
 /**
diff --git a/test/node-unit/cli/options.spec.js b/test/node-unit/cli/options.spec.js
index 4a8f8e348c..fa376fe286 100644
--- a/test/node-unit/cli/options.spec.js
+++ b/test/node-unit/cli/options.spec.js
@@ -25,8 +25,6 @@ const proxyLoadOptions = ({
 
 const defaults = {
   timeout: 1000,
-  timeouts: 1000,
-  t: 1000,
   extension: ['js']
 };