diff --git a/bower.json b/bower.json
deleted file mode 100644
index af2ee029b..000000000
--- a/bower.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  "name": "chai",
-  "description": "BDD/TDD assertion library for node.js and the browser. Test framework agnostic.",
-  "license": "MIT",
-  "keywords": [
-    "test",
-    "assertion",
-    "assert",
-    "testing",
-    "chai"
-  ],
-  "main": "chai.js",
-  "ignore": [
-    "build",
-    "components",
-    "lib",
-    "node_modules",
-    "support",
-    "test",
-    "index.js",
-    "Makefile",
-    ".*"
-  ],
-  "dependencies": {},
-  "devDependencies": {}
-}
diff --git a/karma.conf.cjs b/karma.conf.cjs
deleted file mode 100644
index a7a525bcc..000000000
--- a/karma.conf.cjs
+++ /dev/null
@@ -1,35 +0,0 @@
-module.exports = function(config) {
-  config.set({
-      frameworks: [ 'mocha' ]
-    , files: [
-        { pattern: 'chai.js', type: 'module', included: false, served: true }
-      , { pattern: 'test/bootstrap/index.js', type: 'module'}
-      , { pattern: 'test/*.js', type: 'module' }
-      , { pattern: 'test/type-detect/*.js', type: 'module' }
-      ]
-    , reporters: [ 'progress' ]
-    , colors: true
-    , logLevel: config.LOG_INFO
-    , autoWatch: false
-    , browsers: [ 'HeadlessChrome' ]
-    , customLaunchers: {
-      HeadlessChrome: {
-      base: 'ChromeHeadless'
-    , flags: [ '--no-sandbox',]
-    , }
-    , }
-    , browserDisconnectTimeout: 10000
-    , browserDisconnectTolerance: 2
-    , browserNoActivityTimeout: 20000
-    , singleRun: true
-  });
-
-  switch (process.env.CHAI_TEST_ENV) {
-    case 'sauce':
-      require('./karma.sauce')(config);
-      break;
-    default:
-      // ...
-      break;
-  };
-};
diff --git a/karma.sauce.js b/karma.sauce.js
deleted file mode 100644
index b4f22fe06..000000000
--- a/karma.sauce.js
+++ /dev/null
@@ -1,41 +0,0 @@
-var version = require('./package.json').version;
-var ts = new Date().getTime();
-
-module.exports = function(config) {
-  var auth;
-
-  try {
-    auth = require('./test/auth/index');
-  } catch(ex) {
-    auth = {};
-    auth.SAUCE_USERNAME = process.env.SAUCE_USERNAME || null;
-    auth.SAUCE_ACCESS_KEY = process.env.SAUCE_ACCESS_KEY || null;
-  }
-
-  if (!auth.SAUCE_USERNAME || !auth.SAUCE_ACCESS_KEY) return;
-  if (process.env.SKIP_SAUCE) return;
-
-  var branch = process.env.TRAVIS_BRANCH || 'local'
-  var browserConfig = require('./sauce.browsers');
-  var browsers = Object.keys(browserConfig);
-  var tags = [ 'chaijs_' + version, auth.SAUCE_USERNAME + '@' + branch ];
-  var tunnel = process.env.TRAVIS_JOB_NUMBER || ts;
-
-  if (process.env.TRAVIS_JOB_NUMBER) {
-    tags.push('travis@' + process.env.TRAVIS_JOB_NUMBER);
-  }
-
-  config.browsers = config.browsers.concat(browsers);
-  Object.assign(config.customLaunchers, browserConfig);
-  config.reporters.push('saucelabs');
-  config.captureTimeout = 300000;
-
-  config.sauceLabs = {
-      username: auth.SAUCE_USERNAME
-    , accessKey: auth.SAUCE_ACCESS_KEY
-    , startConnect: ('TRAVIS' in process.env) === false
-    , tags: tags
-    , testName: 'ChaiJS'
-    , tunnelIdentifier: tunnel
-  };
-};
diff --git a/sauce.browsers.js b/sauce.browsers.js
deleted file mode 100644
index 328f0c705..000000000
--- a/sauce.browsers.js
+++ /dev/null
@@ -1,106 +0,0 @@
-
-/*!
- * Chrome
- */
-
-exports['SL_Chrome'] = {
-    base: 'SauceLabs'
-  , browserName: 'chrome'
-};
-
-/*!
- * Firefox
- */
-
- exports['SL_Firefox'] = {
-     base: 'SauceLabs'
-   , browserName: 'firefox'
- };
-
- exports['SL_Firefox_ESR'] = {
-     base: 'SauceLabs'
-   , browserName: 'firefox'
-   , version: 38
- };
-
-/*!
- * Internet Explorer
- */
-
-exports['SL_IE'] = {
-    base: 'SauceLabs'
-  , browserName: 'internet explorer'
-};
-
-/*!
- * TODO: fails because of Uint8Array support
- *
-exports['SL_IE_Old'] = {
-    base: 'SauceLabs'
-  , browserName: 'internet explorer'
-  , version: 10
-};
-*/
-
-exports['SL_Edge'] = {
-    base: 'SauceLabs'
-  , browserName: 'microsoftedge'
-};
-
-/*!
- * Safari
- */
-
-exports['SL_Safari'] = {
-    base: 'SauceLabs'
-  , browserName: 'safari'
-  , platform: 'Mac 10.11'
-};
-
-/*!
- * iPhone
- */
-
-/*!
- * TODO: These take forever to boot or shut down. Causes timeout.
- *
-
-exports['SL_iPhone_6'] = {
-    base: 'SauceLabs'
-  , browserName: 'iphone'
-  , platform: 'Mac 10.8'
-  , version: '6'
-};
-
-exports['SL_iPhone_5-1'] = {
-    base: 'SauceLabs'
-  , browserName: 'iphone'
-  , platform: 'Mac 10.8'
-  , version: '5.1'
-};
-
-exports['SL_iPhone_5'] = {
-    base: 'SauceLabs'
-  , browserName: 'iphone'
-  , platform: 'Mac 10.6'
-  , version: '5'
-};
-
-*/
-
-/*!
- * Android
- */
-
-/*!
- * TODO: fails because of error serialization
- *
-
-exports['SL_Android_4'] = {
-    base: 'SauceLabs'
-  , browserName: 'android'
-  , platform: 'Linux'
-  , version: '4'
-};
-
-*/
diff --git a/support/sauce/sauce_connect_block.sh b/support/sauce/sauce_connect_block.sh
deleted file mode 100755
index 126d37109..000000000
--- a/support/sauce/sauce_connect_block.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-
-# Wait for Connect to be ready before exiting
-while [ ! -f $SAUCE_CONNECT_READY_FILE ]; do
-  sleep .5
-done
diff --git a/support/sauce/sauce_connect_setup.sh b/support/sauce/sauce_connect_setup.sh
deleted file mode 100755
index 2c385e18a..000000000
--- a/support/sauce/sauce_connect_setup.sh
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# Setup and start Sauce Connect for your TravisCI build
-# This script requires your .travis.yml to include the following two private env variables:
-# SAUCE_USERNAME
-# SAUCE_ACCESS_KEY
-# Follow the steps at https://saucelabs.com/opensource/travis to set that up.
-#
-# Curl and run this script as part of your .travis.yml before_script section:
-# before_script:
-#   - curl https://gist.github.com/santiycr/5139565/raw/sauce_connect_setup.sh | bash
-
-CONNECT_URL="http://saucelabs.com/downloads/Sauce-Connect-latest.zip"
-CONNECT_DIR="/tmp/sauce-connect-$RANDOM"
-CONNECT_DOWNLOAD="Sauce_Connect.zip"
-
-mkdir -p $LOGS_DIR
-CONNECT_LOG="$LOGS_DIR/sauce-connect"
-CONNECT_STDOUT="$LOGS_DIR/sauce-connect.stdout"
-CONNECT_STDERR="$LOGS_DIR/sauce-connect.stderr"
-
-# Get Connect and start it
-mkdir -p $CONNECT_DIR
-cd $CONNECT_DIR
-curl $CONNECT_URL -o $CONNECT_DOWNLOAD 2> /dev/null 1> /dev/null
-unzip $CONNECT_DOWNLOAD > /dev/null
-rm $CONNECT_DOWNLOAD
-
-SAUCE_ACCESS_KEY=`echo $SAUCE_ACCESS_KEY | rev`
-
-
-ARGS=""
-
-# Set tunnel-id only on Travis, to make local testing easier.
-if [ ! -z "$TRAVIS_JOB_NUMBER" ]; then
-  ARGS="$ARGS --tunnel-identifier $TRAVIS_JOB_NUMBER"
-fi
-if [ ! -z "$SAUCE_CONNECT_READY_FILE" ]; then
-  ARGS="$ARGS --readyfile $SAUCE_CONNECT_READY_FILE"
-fi
-
-echo "Starting Sauce Connect in the background:"
-echo "  Arg: $ARGS"
-echo "Logging into:"
-echo "  Log: $CONNECT_LOG"
-echo "  Out: $CONNECT_STDOUT"
-echo "  Err: $CONNECT_STDERR"
-java -jar Sauce-Connect.jar $ARGS $SAUCE_USERNAME $SAUCE_ACCESS_KEY \
-  --logfile $CONNECT_LOG 2> $CONNECT_STDERR 1> $CONNECT_STDOUT &
-CONNECT_PID=$!
-echo "  Pid: $CONNECT_PID"