diff --git a/.github/workflows/build-on-pull-request.yml b/.github/workflows/build-on-pull-request.yml
index 05d6a4a39..57f00751d 100644
--- a/.github/workflows/build-on-pull-request.yml
+++ b/.github/workflows/build-on-pull-request.yml
@@ -67,3 +67,7 @@ jobs:
 
       - name: Build app (release)
         run: msbuild src\cc65.sln -t:rebuild -property:Configuration=Release
+
+      # The regression tests are currently too slow to run for this Windows build,
+      # but the "Windows Test Manual" workflow (windows-test-manual.yml) can by
+      # manually dispatched from the Actions menu to test as needed.
diff --git a/.github/workflows/snapshot-on-push-master.yml b/.github/workflows/snapshot-on-push-master.yml
index 50f5cd296..43fcce0a8 100644
--- a/.github/workflows/snapshot-on-push-master.yml
+++ b/.github/workflows/snapshot-on-push-master.yml
@@ -29,6 +29,10 @@ jobs:
       - name: Build app (release)
         run: msbuild src\cc65.sln -t:rebuild -property:Configuration=Release
 
+      # The regression tests are currently too slow to run for this Windows build,
+      # but the "Windows Test Manual" workflow (windows-test-manual.yml) can by
+      # manually dispatched from the Actions menu to test as needed.
+
   build_linux:
     name: Build, Test, and Snapshot (Linux)
     if: github.repository == 'cc65/cc65'
diff --git a/.github/workflows/windows-test-manual.yml b/.github/workflows/windows-test-manual.yml
new file mode 100644
index 000000000..854327726
--- /dev/null
+++ b/.github/workflows/windows-test-manual.yml
@@ -0,0 +1,43 @@
+name: Windows Test Manual
+# Manually dispatched because it's much slower than the Linux test.
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build_windows:
+    name: Build, Test (Windows MSVC)
+    runs-on: windows-latest
+
+    steps:
+      - name: Git Setup
+        shell: bash
+        run: git config --global core.autocrlf input
+
+      - name: Checkout source
+        uses: actions/checkout@v3
+
+      - name: Add msbuild to PATH
+        uses: microsoft/setup-msbuild@v1.1
+
+      - name: Build app (MSVC debug)
+        run: msbuild src\cc65.sln -t:rebuild -property:Configuration=Debug
+
+      - name: Build app (MSVC release)
+        run: msbuild src\cc65.sln -t:rebuild -property:Configuration=Release
+
+      - name: Build utils (MinGW)
+        shell: cmd
+        run: make -j2 util
+
+      - name: Build the platform libraries (make lib)
+        shell: cmd
+        run: make -j2 lib QUIET=1
+
+      - name: Run the regression tests (make test)
+        shell: cmd
+        run: make test QUIET=1
+
+      - name: Test that the samples can be built (make samples)
+        shell: cmd
+        run: make -j2 samples