diff --git a/lib/config.js b/lib/config.js
index d1cd93288c..c230db5d96 100755
--- a/lib/config.js
+++ b/lib/config.js
@@ -201,7 +201,6 @@ Config.prototype.buildArgs = function () {
     }
     args.symbol_level = 2
     args.enable_profiling = true
-    args.is_win_fastlink = true
   }
 
   if (this.sccache && process.platform === 'win32') {
@@ -297,6 +296,8 @@ Config.prototype.buildArgs = function () {
     delete args.brave_referrals_api_key
     delete args.brave_infura_project_id
     delete args.binance_client_id
+    delete args.brave_services_key
+    delete args.webcompat_report_api_endpoint
   }
 
   if (process.platform === 'win32') {
diff --git a/lib/test.js b/lib/test.js
index 9899e143c9..f3c1adea06 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -39,6 +39,11 @@ const test = (suite, buildConfig = config.defaultBuildConfig, options) => {
   // Build the tests
   util.run('ninja', ['-C', config.outputDir, suite], config.defaultOptions)
 
+  const run_brave_rewards_unitests = suite === 'brave_unit_tests' && config.targetOS !== 'ios'
+  if (run_brave_rewards_unitests) {
+    util.run('ninja', ['-C', config.outputDir, 'brave_rewards_unit_tests'], config.defaultOptions)
+  }
+
   const run_brave_installer_unitests = suite === 'brave_unit_tests' && config.targetOS !== 'android'
   if (run_brave_installer_unitests) {
     util.run('ninja', ['-C', config.outputDir, 'brave_installer_unittests'], config.defaultOptions)
@@ -60,18 +65,31 @@ const test = (suite, buildConfig = config.defaultBuildConfig, options) => {
     util.run('ninja', ['-C', config.outputDir, "fix_brave_test_install_name_speedreader"], config.defaultOptions)
 
     let testBinary;
+    let rewardsTestBinary;
     let installerTestBinary;
     if (process.platform === 'win32') {
       testBinary = `${suite}.exe`
+      rewardsTestBinary = 'brave_rewards_unit_tests.exe'
       installerTestBinary = 'brave_installer_unittests.exe'
     } else {
       testBinary = suite
+      rewardsTestBinary = 'brave_rewards_unit_tests'
       installerTestBinary = 'brave_installer_unittests'
     }
 
     // Run the tests
     util.run(path.join(config.outputDir, testBinary), braveArgs, config.defaultOptions)
 
+    if (run_brave_rewards_unitests) {
+      // Replace output file arguments
+      if (options.output) {
+        braveArgs.splice(braveArgs.indexOf('--gtest_output=xml:' + options.output, 1))
+        braveArgs.push('--gtest_output=xml:brave_rewards_unit_tests.xml')
+      }
+
+      util.run(path.join(config.outputDir, rewardsTestBinary), braveArgs, config.defaultOptions)
+    }
+
     if (run_brave_installer_unitests) {
       // Replace output file arguments
       if (options.output) {
diff --git a/lib/util.js b/lib/util.js
index d1ef5b447e..43aa105f08 100755
--- a/lib/util.js
+++ b/lib/util.js
@@ -309,8 +309,6 @@ const util = {
       const androidIconDest = path.join(config.srcDir, 'chrome', 'android', 'java', 'res_chromium')
       const androidResSource = path.join(config.projects['brave-core'].dir, 'android', 'java', 'res')
       const androidResDest = path.join(config.srcDir, 'chrome', 'android', 'java', 'res')
-      const androidResNightSource = path.join(config.projects['brave-core'].dir, 'android', 'java', 'res_night')
-      const androidResNightDest = path.join(config.srcDir, 'chrome', 'android', 'java', 'res_night')
       const androidNtpTilesResSource = path.join(config.projects['brave-core'].dir, 'components', 'ntp_tiles', 'resources')
       const androidNtpTilesResDest = path.join(config.srcDir, 'components', 'ntp_tiles', 'resources')
       const androidResTemplateSource = path.join(config.projects['brave-core'].dir, 'android', 'java', 'res_template')
@@ -322,7 +320,6 @@ const util = {
       const copyAndroidResourceMapping = {
         [androidIconSource]: [androidIconDest],
         [androidResSource]: [androidResDest],
-        [androidResNightSource]: [androidResNightDest],
         [androidNtpTilesResSource]: [androidNtpTilesResDest],
         [androidResTemplateSource]: [androidResTemplateDest],
         [androidContentPublicResSource]: [androidContentPublicResDest]
diff --git a/package.json b/package.json
index 89967b6776..3544bdf81e 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "projects": {
       "chrome": {
         "dir": "src",
-        "tag": "81.0.4044.138",
+        "tag": "83.0.4103.56",
         "repository": {
           "url": "https://github.com/chromium/chromium"
         },
@@ -45,7 +45,7 @@
       },
       "brave-core": {
         "dir": "src/brave",
-        "branch": "master",
+        "branch": "cr83",
         "repository": {
           "url": "https://github.com/brave/brave-core.git"
         }