diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b747550..4f18610 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
     uses: beeware/.github/.github/workflows/app-build-verify.yml@main
     with:
       python-version: ${{ matrix.python-version }}
-      runner-os: windows-latest
+      runner-os: ${{ matrix.runs-on }}
       framework: ${{ matrix.framework }}
       target-platform: windows
       target-format: VisualStudio
@@ -40,10 +40,21 @@ jobs:
       matrix:
         python-version: [ "3.10", "3.11", "3.12", "3.13", "3.14" ]
         framework: [ "toga", "pyside6", "pygame", "console" ]
-        # Pygame hasn't published 3.14 wheels yet.
-        # Toga is waiting on a release of Python.net for 3.14
+        runs-on: ["windows-latest", "windows-11-arm"]
         exclude:
+          # Github Actions doesn't provide Windows/ARM64 builds for Python 3.10
+          - python-version: "3.10"
+            runs-on: "windows-11-arm"
+          # Pygame hasn't published 3.14 wheels.
           - python-version: "3.14"
             framework: pygame
+          # Pygame hasn't published any Windows/ARM64 wheels.
+          - framework: pygame
+            runs-on: windows-11-arm
+          # Toga is waiting on a release of Python.net for 3.14
           - python-version: "3.14"
             framework: toga
+          # Toga tests won't run on Windows/ARM64 until
+          # https://github.com/actions/partner-runner-images/issues/174 is resolved
+          - framework: "toga"
+            runs-on: windows-11-arm
diff --git a/.github/workflows/update-binary.yml b/.github/workflows/update-binary.yml
index 575378d..1567f8a 100644
--- a/.github/workflows/update-binary.yml
+++ b/.github/workflows/update-binary.yml
@@ -21,18 +21,18 @@ jobs:
         python-version: [ "3.11", "3.12", "3.13", "3.14" ]
         config:
           - runner: windows-latest
-            arch: x64
-            suffix: '-amd64'
+            vscode_arch: x64
+            arch: amd64
           - runner: windows-11-arm
-            arch: ARM64
-            suffix: '-arm64'
+            vscode_arch: ARM64
+            arch: arm64
         include:
           # GitHub doesn't provide ARM64 binaries for Python 3.10
           - python-version: "3.10"
             config:
               runner: windows-latest
-              arch: x64
-              suffix: '-amd64'
+              vscode_arch: x64
+              arch: amd64
 
     runs-on: ${{ matrix.config.runner }}
     steps:
@@ -67,13 +67,13 @@ jobs:
         cd stub
         briefcase build windows visualstudio
 
-        echo "Build ${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }} console stub artefact"
-        mv "./build/console-stub/windows/visualstudio/${{ matrix.config.arch }}/Release/console-stub.exe" ./Stub.exe
-        7z a Console-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}.zip Stub.exe
+        echo "Build ${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }} console stub artefact"
+        mv "./build/console-stub/windows/visualstudio/${{ matrix.config.vscode_arch }}/Release/console-stub.exe" ./Stub.exe
+        7z a Console-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip Stub.exe
 
-        echo "Build ${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }} GUI stub artefact"
-        mv "./build/gui-stub/windows/visualstudio/${{ matrix.config.arch }}/Release/GUI Stub.exe" ./Stub.exe
-        7z a GUI-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}.zip Stub.exe
+        echo "Build ${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }} GUI stub artefact"
+        mv "./build/gui-stub/windows/visualstudio/${{ matrix.config.vscode_arch }}/Release/GUI Stub.exe" ./Stub.exe
+        7z a GUI-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip Stub.exe
 
         echo "Stub binaries:"
         ls -1 *.zip
@@ -88,5 +88,5 @@ jobs:
         python -m pip install -U setuptools
         python -m pip install awscli
 
-        aws s3 cp stub/Console-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ env.PYTHON_TAG }}/windows/Console-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}${{ matrix.config.suffix }}.zip
-        aws s3 cp stub/GUI-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ env.PYTHON_TAG }}/windows/GUI-Stub-${{ env.PYTHON_TAG }}-${{ env.BUILD_NUMBER }}${{ matrix.config.suffix }}.zip
+        aws s3 cp stub/Console-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ env.PYTHON_TAG }}/windows/Console-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip
+        aws s3 cp stub/GUI-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ env.PYTHON_TAG }}/windows/GUI-Stub-${{ env.PYTHON_TAG }}-${{ matrix.config.arch }}-${{ env.BUILD_NUMBER }}.zip
diff --git a/.gitignore b/.gitignore
index 7b5f52d..d89dfb8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@ venv/
 stub/build/
 stub/dist/
 stub/logs/
+*.zip
+*.exe
diff --git a/{{ cookiecutter.format }}/briefcase.toml b/{{ cookiecutter.format }}/briefcase.toml
index 8e146ab..2305743 100644
--- a/{{ cookiecutter.format }}/briefcase.toml	
+++ b/{{ cookiecutter.format }}/briefcase.toml	
@@ -12,9 +12,9 @@ extras_path = "extras"
 {{ {
     "3.10": "support_revision = 11",
     "3.11": "support_revision = 9",
-    "3.12": "support_revision = 9",
-    "3.13": "support_revision = 8",
-    "3.14": "support_revision = 0",
+    "3.12": "support_revision = 10",
+    "3.13": "support_revision = 13",
+    "3.14": "support_revision = 4",
 }.get(cookiecutter.python_version|py_tag, "") }}
 
 icon = "{{ cookiecutter.formal_name }}/icon.ico"
diff --git a/{{ cookiecutter.format }}/{{ cookiecutter.formal_name }}/Main.cpp b/{{ cookiecutter.format }}/{{ cookiecutter.formal_name }}/Main.cpp
index 45a7f00..96f6f04 100644
--- a/{{ cookiecutter.format }}/{{ cookiecutter.formal_name }}/Main.cpp	
+++ b/{{ cookiecutter.format }}/{{ cookiecutter.formal_name }}/Main.cpp	
@@ -389,13 +389,20 @@ void setup_stdout(FileVersionInfo^ version_info) {
         // Python uses the CRT for I/O, and it requires the descriptors are reopened.
         // Windows GUI apps return to the prompt immediately, so console output from
         // this app is able to contaminate output from other commands being executed;
-        // but that's better than not seeing console output at all.
+        // but that's better than not seeing console output at all. However, we can't
+        // do this in test mode, because it prevents Briefcase seeing test output.
         FILE *new_stdin;
         FILE *new_stdout;
         FILE *new_stderr;
-        freopen_s(&new_stdin, "CONIN$", "r", stdin);
-        freopen_s(&new_stdout, "CONOUT$", "w", stdout);
-        freopen_s(&new_stderr, "CONOUT$", "w", stderr);
+        wchar_t *app_module_str;
+        size_t size;
+
+        _wdupenv_s(&app_module_str, &size, L"BRIEFCASE_MAIN_MODULE");
+        if (!app_module_str) {
+            freopen_s(&new_stdin, "CONIN$", "r", stdin);
+            freopen_s(&new_stdout, "CONOUT$", "w", stdout);
+            freopen_s(&new_stderr, "CONOUT$", "w", stderr);
+        }
     }
 
     debug_log("Log started: %S\n", wstr(DateTime::Now.ToString("yyyy-MM-dd HH:mm:ssZ")));