diff --git a/.github/workflows/positron-full-test.yml b/.github/workflows/positron-full-test.yml
index 350240054bc..1837f392e13 100644
--- a/.github/workflows/positron-full-test.yml
+++ b/.github/workflows/positron-full-test.yml
@@ -119,8 +119,8 @@ jobs:
 
       - name: Run Smoke Tests (Electron)
         env:
-          POSITRON_PY_VER_SEL: Python 3.10.12
-          POSITRON_R_VER_SEL: R 4.4.0
+          POSITRON_PY_VER_SEL: 3.10.12
+          POSITRON_R_VER_SEL: 4.4.0
         id: electron-smoke-tests
         run: DISPLAY=:10 yarn smoketest-no-compile --tracing
 
diff --git a/.github/workflows/positron-merge-to-main.yml b/.github/workflows/positron-merge-to-main.yml
new file mode 100644
index 00000000000..31438c0658b
--- /dev/null
+++ b/.github/workflows/positron-merge-to-main.yml
@@ -0,0 +1,88 @@
+name: "Positron: CI - merge to main"
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+
+  linux:
+    name: Tests on Linux
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      POSITRON_BUILD_NUMBER: 0 # CI skips building releases
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Build Environment
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y vim curl build-essential clang make cmake git python3-pip python-is-python3 libsodium-dev libxkbfile-dev pkg-config libsecret-1-dev libxss1 dbus xvfb libgtk-3-0 libgbm1 libnss3 libnspr4 libasound2 libkrb5-dev libcairo-dev libsdl-pango-dev libjpeg-dev libgif-dev
+          sudo cp build/azure-pipelines/linux/xvfb.init /etc/init.d/xvfb
+          sudo chmod +x /etc/init.d/xvfb
+          sudo update-rc.d xvfb defaults
+          sudo service xvfb start
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+
+      - name: Execute yarn
+        env:
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+          ELECTRON_SKIP_BINARY_DOWNLOAD: 1
+          POSITRON_GITHUB_PAT: ${{ github.token }}
+        run: |
+          # Install Yarn
+          npm install -g yarn
+
+          # Install node-gyp; this is required by some packages, and yarn
+          # sometimes fails to automatically install it.
+          yarn global add node-gyp
+
+          # Perform the main yarn command; this installs all Node packages and
+          # dependencies
+          yarn --immutable --network-timeout 120000
+          yarn --cwd test/automation install
+          yarn --cwd test/smoke install
+
+      - name: Compile and Download
+        run: yarn npm-run-all --max_old_space_size=4095 -lp compile "electron x64" playwright-install download-builtin-extensions
+
+      - name: Compile Smoke Tests
+        run: yarn --cwd test/smoke compile
+
+      - name: Install rig, R, and R packages
+        run: |
+          curl -Ls https://github.com/r-lib/rig/releases/download/latest/rig-linux-"$(arch)"-latest.tar.gz | $(which sudo) tar xz -C /usr/local
+          rig add 4.4.0
+          curl https://raw.githubusercontent.com/posit-dev/qa-example-content/main/DESCRIPTION --output DESCRIPTION
+          Rscript -e "pak::local_install_dev_deps(ask = FALSE)"
+
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v2.0.2
+
+      - name: Install python dependencies
+        run: |
+          curl https://raw.githubusercontent.com/posit-dev/qa-example-content/main/requirements.txt --output requirements.txt
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements.txt
+          python -m pip install matplotlib ipykernel graphviz
+
+      - name: Run Smoke Tests (Electron)
+        env:
+          POSITRON_PY_VER_SEL: 3.10.12
+          POSITRON_R_VER_SEL: 4.4.0
+        id: electron-smoke-tests
+        run: DISPLAY=:10 yarn smoketest-merge-to-main --tracing
+
+      - name: Upload run artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: run-artifacts
+          path: .build/logs/smoke-tests-electron/
diff --git a/.github/workflows/positron-ci.yml b/.github/workflows/positron-pull-requests.yml
similarity index 95%
rename from .github/workflows/positron-ci.yml
rename to .github/workflows/positron-pull-requests.yml
index 85f6a15b0dd..8191cfdd400 100644
--- a/.github/workflows/positron-ci.yml
+++ b/.github/workflows/positron-pull-requests.yml
@@ -1,9 +1,6 @@
-name: "Positron: CI"
+name: "Positron: CI - pull request"
 
 on:
-  push:
-    branches:
-      - main
   pull_request:
     branches:
       - main
@@ -88,8 +85,8 @@ jobs:
 
       - name: Run Smoke Tests (Electron)
         env:
-          POSITRON_PY_VER_SEL: Python 3.10.12
-          POSITRON_R_VER_SEL: R 4.4.0
+          POSITRON_PY_VER_SEL: 3.10.12
+          POSITRON_R_VER_SEL: 4.4.0
         id: electron-smoke-tests
         run: DISPLAY=:10 yarn smoketest-pr --tracing
 
diff --git a/package.json b/package.json
index 034df471685..703bce745f0 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "smoketest": "node build/lib/preLaunch.js && cd test/smoke && BUILD_ARTIFACTSTAGINGDIRECTORY=../../.build/logs/smoke-tests-electron yarn compile && node test/index.js",
     "smoketest-no-compile": "cd test/smoke && BUILD_ARTIFACTSTAGINGDIRECTORY=../../.build/logs/smoke-tests-electron node test/index.js",
     "smoketest-pr": "cd test/smoke && TEST_FILTER=/#pr/ node test/index.js",
+    "smoketest-merge-to-main": "cd test/smoke && node test/index.js",
     "download-builtin-extensions": "node build/lib/builtInExtensions.js",
     "download-builtin-extensions-cg": "node build/lib/builtInExtensionsCG.js",
     "download-pandoc": "node build/lib/pandoc.js",
diff --git a/test/smoke/test/index.js b/test/smoke/test/index.js
index 02c75702a9f..0795116f37a 100644
--- a/test/smoke/test/index.js
+++ b/test/smoke/test/index.js
@@ -39,8 +39,13 @@ if (process.env.BUILD_ARTIFACTSTAGINGDIRECTORY) {
 const mocha = new Mocha(options);
 mocha.addFile('out/main.js');
 // --- Start Positron ---
-mocha.grep(process.env.TEST_FILTER || '');
-// mocha.dryRun(); // debugging
+if (process.env.TEST_FILTER) {
+	mocha.grep(process.env.TEST_FILTER);
+} else if (process.env.INVERSE_FILTER) {
+	mocha.grep(process.env.INVERSE_FILTER);
+	mocha.invert();
+}
+// mocha.dryRun(); // debugging filters
 // --- End Positron ---
 mocha.run(failures => {