diff --git a/README.md b/README.md
index 453e1305526..43ff9ec81a5 100644
--- a/README.md
+++ b/README.md
@@ -143,7 +143,7 @@ Just try to follow these rules, so we can spend more time fixing bugs and implem
 The STL uses boost-math headers to provide P0226R1 Mathematical Special Functions. We recommend using [vcpkg][] to
 acquire this dependency.
 
-1. Install Visual Studio 2019 16.10 Preview 4 or later.
+1. Install Visual Studio 2019 16.11 Preview 1 or later.
     * We recommend selecting "C++ CMake tools for Windows" in the VS Installer.
     This will ensure that you're using supported versions of CMake and Ninja.
     * Otherwise, install [CMake][] 3.20 or later, and [Ninja][] 1.10.2 or later.
@@ -158,7 +158,7 @@ acquire this dependency.
 
 # How To Build With A Native Tools Command Prompt
 
-1. Install Visual Studio 2019 16.10 Preview 4 or later.
+1. Install Visual Studio 2019 16.11 Preview 1 or later.
     * We recommend selecting "C++ CMake tools for Windows" in the VS Installer.
     This will ensure that you're using supported versions of CMake and Ninja.
     * Otherwise, install [CMake][] 3.20 or later, and [Ninja][] 1.10.2 or later.
diff --git a/azure-devops/create-vmss.ps1 b/azure-devops/create-vmss.ps1
index b1057a018a8..35cab0e3be2 100644
--- a/azure-devops/create-vmss.ps1
+++ b/azure-devops/create-vmss.ps1
@@ -27,7 +27,7 @@ $ProtoVMName = 'PROTOTYPE'
 $LiveVMPrefix = 'BUILD'
 $ImagePublisher = 'MicrosoftWindowsDesktop'
 $ImageOffer = 'Windows-10'
-$ImageSku = '20h2-ent-g2'
+$ImageSku = '21h1-ent-g2'
 
 $ProgressActivity = 'Creating Scale Set'
 $TotalProgress = 14
@@ -310,6 +310,8 @@ Write-Progress `
   -Status 'Sleeping after restart' `
   -PercentComplete (100 / $TotalProgress * $CurrentProgress++)
 
+# The VM appears to be busy immediately after restarting.
+# This workaround waits for a minute before attempting to run sysprep.ps1.
 Start-Sleep -Seconds 60
 
 ####################################################################################################
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index b8b5c034e9f..ba1b161f8d0 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -8,7 +8,7 @@ variables:
   buildOutputLocation: 'D:\build'
   vcpkgLocation: '$(Build.SourcesDirectory)/vcpkg'
 
-pool: 'StlBuild-2021-05-18'
+pool: 'StlBuild-2021-06-02'
 
 stages:
   - stage: Code_Format
diff --git a/tests/utils/stl/test/tests.py b/tests/utils/stl/test/tests.py
index f9711390a12..797b9a4c9fb 100644
--- a/tests/utils/stl/test/tests.py
+++ b/tests/utils/stl/test/tests.py
@@ -234,7 +234,7 @@ def _parseFlags(self):
                 if flag[5:] == 'c++latest':
                     self._addCustomFeature('c++2a')
                 elif flag[5:] == 'c++20':
-                    self.requires.append('unsupported_potato') # TRANSITION, VS2019 Preview 16.11
+                    self._addCustomFeature('c++2a')
                 elif flag[5:] == 'c++17':
                     self._addCustomFeature('c++17')
                 elif flag[5:] == 'c++14':