diff --git a/.github/workflows/daily.yml b/.github/workflows/daily.yml
index bda568659b9f..254258202197 100644
--- a/.github/workflows/daily.yml
+++ b/.github/workflows/daily.yml
@@ -29,85 +29,13 @@ env:
 
 jobs:
   stubtest-stdlib:
-    name: "stubtest: stdlib"
-    if: ${{ github.repository == 'python/typeshed' || github.event_name != 'schedule' }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
-        exclude:
-          # https://github.com/python/typeshed/issues/15694
-          - os: "windows-latest"
-            python-version: "3.10"
-      fail-fast: false
-
-    steps:
-      - uses: actions/checkout@v7
-      - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
-        uses: actions/setup-python@v6
-        with:
-          python-version: ${{ matrix.python-version }}
-          cache: pip
-          cache-dependency-path: requirements-tests.txt
-          allow-prereleases: true
-          check-latest: true
-      - name: Install dependencies
-        run: pip install -r requirements-tests.txt
-      - name: Run stubtest
-        run: python tests/stubtest_stdlib.py
+    uses: $/.github/workflows/stubtest_stdlib.yml
 
   stubtest-third-party:
-    name: "stubtest: third party"
-    if: ${{ github.repository == 'python/typeshed' || github.event_name != 'schedule' }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        shard-index: [0, 1, 2, 3]
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v7
-      - uses: actions/setup-python@v6
-        with:
-          python-version: "3.13"
-          cache: pip
-          cache-dependency-path: |
-            requirements-tests.txt
-            stubs/**/METADATA.toml
-      - name: Install dependencies
-        run: pip install -r requirements-tests.txt
-      - name: Install required system packages
-        shell: bash
-        run: |
-          PACKAGES=$(python tests/get_stubtest_system_requirements.py)
-
-          if [ "${{ runner.os }}" = "Linux" ]; then
-            if [ -n "$PACKAGES" ]; then
-              printf "Installing APT packages:\n  $(echo $PACKAGES | sed 's/ /\n  /g')\n"
-              sudo apt-get update -q && sudo apt-get install -qy $PACKAGES
-            fi
-          else
-            if [ "${{ runner.os }}" = "macOS" ] && [ -n "$PACKAGES" ]; then
-              printf "Installing Homebrew packages:\n  $(echo $PACKAGES | sed 's/ /\n  /g')\n"
-              brew install -q $PACKAGES
-            fi
-
-            if [ "${{ runner.os }}" = "Windows" ] && [ -n "$PACKAGES" ]; then
-              printf "Installing Chocolatey packages:\n  $(echo $PACKAGES | sed 's/ /\n  /g')\n"
-              choco install -y $PACKAGES
-            fi
-          fi
-      - name: Run stubtest
-        shell: bash
-        run: |
-          if [ "${{ runner.os }}" = "Linux" ]; then
-            PYTHON_EXECUTABLE="xvfb-run python"
-          else
-            PYTHON_EXECUTABLE="python"
-          fi
-
-          $PYTHON_EXECUTABLE tests/stubtest_third_party.py --ci-platforms-only --num-shards 4 --shard-index ${{ matrix.shard-index }}
+    uses: $/.github/workflows/stubtest_third_party.yml
+    with:
+      all-stubs: true
+      sharded: true
 
   stub-uploader:
     name: stub_uploader tests
diff --git a/.github/workflows/stubtest_stdlib.yml b/.github/workflows/stubtest_stdlib.yml
index 5a4ad30473f6..4ac93d89c3b4 100644
--- a/.github/workflows/stubtest_stdlib.yml
+++ b/.github/workflows/stubtest_stdlib.yml
@@ -11,6 +11,7 @@ on:
       - ".github/workflows/stubtest_stdlib.yml"
       - "tests/**"
       # When requirements.txt changes, we run `daily.yml`, which includes stdlib stubtest
+  workflow_call:
 
 permissions:
   contents: read
@@ -21,12 +22,13 @@ env:
   TERM: xterm-256color # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  group: stubtest-stdlib-${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:
   stubtest-stdlib:
     name: "stubtest: stdlib"
+    if: ${{ github.repository == 'python/typeshed' || github.event_name != 'schedule' }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
diff --git a/.github/workflows/stubtest_third_party.yml b/.github/workflows/stubtest_third_party.yml
index 540a609ca1c2..73926e21e817 100644
--- a/.github/workflows/stubtest_third_party.yml
+++ b/.github/workflows/stubtest_third_party.yml
@@ -7,6 +7,18 @@ on:
       - ".github/workflows/stubtest_third_party.yml"
       - "tests/**"
       # When requirements.txt changes, we run `daily.yml`, which includes third-party stubtest
+  workflow_call:
+    inputs:
+      all-stubs:
+        description: "Run on all stubs, not only changed"
+        required: false
+        default: false
+        type: boolean
+      sharded:
+        description: "Split the run across 4 shards"
+        required: false
+        default: false
+        type: boolean
 
 permissions:
   contents: read
@@ -22,17 +34,19 @@ env:
   TERM: xterm-256color # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  group: stubtest-third-party-${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:
   stubtest-third-party:
     name: "stubtest: third party"
+    if: ${{ github.repository == 'python/typeshed' || github.event_name != 'schedule' }}
 
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
+        shard-index: ${{ inputs.sharded && fromJSON('[0, 1, 2, 3]') || fromJSON('[0]') }}
       fail-fast: false
 
     steps:
@@ -49,6 +63,7 @@ jobs:
       - name: Install dependencies
         run: pip install -r requirements-tests.txt
       - name: Determine changed stubs
+        if: ${{ ! inputs.all-stubs }}
         shell: bash
         run: |
           # This only runs stubtest on changed stubs, because it is much faster.
@@ -64,7 +79,7 @@ jobs:
       - name: Install required system packages
         shell: bash
         run: |
-          if [ -n "$STUBS" ]; then
+          if [ -n "$STUBS" -o "${{ inputs.all-stubs }}" = "true" ]; then
             PACKAGES=$(python tests/get_stubtest_system_requirements.py $STUBS)
             if [ "${{ runner.os }}" = "Linux" ]; then
               if [ -n "$PACKAGES" ]; then
@@ -88,14 +103,16 @@ jobs:
         run: |
           if [ -n "$STUBS" ]; then
             echo "Testing $STUBS..."
+          fi
 
+          if [ -n "$STUBS" -o "${{ inputs.all-stubs }}" = "true" ]; then
             if [ "${{ runner.os }}" = "Linux" ]; then
               PYTHON_EXECUTABLE="xvfb-run python"
             else
               PYTHON_EXECUTABLE="python"
             fi
 
-            $PYTHON_EXECUTABLE tests/stubtest_third_party.py --ci-platforms-only $STUBS
+            $PYTHON_EXECUTABLE tests/stubtest_third_party.py --ci-platforms-only --num-shards ${{ inputs.sharded && 4 || 1 }} --shard-index ${{ matrix.shard-index }} $STUBS
           else
             echo "Nothing to test"
           fi