diff --git a/.github/workflows/libjs-test262.yml b/.github/workflows/libjs-test262.yml
new file mode 100644
index 00000000000..b5b290c7dab
--- /dev/null
+++ b/.github/workflows/libjs-test262.yml
@@ -0,0 +1,159 @@
+name: Run test262 and test-wasm
+
+on: [push]
+
+env:
+  SERENITY_SOURCE_DIR: ${{ github.workspace }}
+
+jobs:
+  run_and_update_results:
+    runs-on: self-hosted
+    if: always() && github.repository == 'SerenityOS/serenity' && github.ref == 'refs/heads/master'
+
+    concurrency: libjs-test262
+
+    steps:
+      - name: Cleanup
+        run: |
+          echo "Cleaning up previous run"
+          rm -rf "${{ github.workspace }}/*"
+
+      - name: Checkout SerenityOS/serenity
+        uses: actions/checkout@v3
+
+      - name: Checkout SerenityOS/libjs-test262
+        uses: actions/checkout@v3
+        with:
+          repository: SerenityOS/libjs-test262
+          path: libjs-test262
+
+      - name: Checkout SerenityOS/libjs-test262-data
+        uses: actions/checkout@v3
+        with:
+          repository: SerenityOS/libjs-test262-data
+          path: libjs-test262-data
+          lfs: true
+
+      - name: Checkout SerenityOS/libjs-test262-data LFS objects
+        working-directory: libjs-test262-data
+        run: git lfs checkout
+
+      - name: Checkout tc39/test262
+        uses: actions/checkout@v3
+        with:
+          repository: tc39/test262
+          path: test262
+
+      - name: Checkout tc39/test262-parser-tests
+        uses: actions/checkout@v3
+        with:
+          repository: tc39/test262-parser-tests
+          path: test262-parser-tests
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ninja-build unzip gcc-12 g++-12 jq wget
+          test -e /opt/wabt-1.0.27 || (
+            cd /tmp
+            wget https://github.com/WebAssembly/wabt/releases/download/1.0.27/wabt-1.0.27-ubuntu.tar.gz
+            sudo tar xf wabt-1.0.27-ubuntu.tar.gz -C /opt
+            rm wabt-1.0.27-ubuntu.tar.gz
+          )
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install Python dependencies
+        # The setup-python action set default python to python3.x. Note that we are not using system python here.
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r libjs-test262/requirements.txt
+
+      - name: Check versions
+        run: set +e; g++ --version; g++-12 --version; python --version; python3 --version; ninja --version
+
+      - name: TimeZoneData cache
+        uses: actions/cache@v3
+        with:
+          path: ${{ github.workspace }}/libjs-test262/Build/TZDB
+          key: TimeZoneData-${{ hashFiles('Meta/CMake/time_zone_data.cmake') }}
+
+      - name: UnicodeData cache
+        uses: actions/cache@v3
+        with:
+          path: ${{ github.workspace }}/libjs-test262/Build/UCD
+          key: UnicodeData-${{ hashFiles('Meta/CMake/unicode_data.cmake') }}
+
+      - name: UnicodeLocale cache
+        uses: actions/cache@v3
+        with:
+          path: ${{ github.workspace }}/libjs-test262/Build/CLDR
+          key: UnicodeLocale-${{ hashFiles('Meta/CMake/locale_data.cmake') }}
+
+      - name: Get previous results
+        run: |
+          mkdir -p old-libjs-test262-data
+          cp -R libjs-test262-data/test262 libjs-test262-data/wasm old-libjs-test262-data
+
+      - name: Build test262-runner, test-js and test-wasm
+        working-directory: libjs-test262
+        run: |
+          env PATH="/opt/wabt-1.0.27/bin:$PATH" \
+              cmake -GNinja -B Build -DCMAKE_C_COMPILER=gcc-12 -DCMAKE_CXX_COMPILER=g++-12 -DWASM_SPEC_TEST_SKIP_FORMATTING=ON -DINCLUDE_WASM_SPEC_TESTS=ON -DSERENITY_SOURCE_DIR=${{ env.SERENITY_SOURCE_DIR }}
+          ninja -C Build test262-runner test-js test-wasm
+
+      - name: Run test262 and test262-parser-tests
+        working-directory: libjs-test262
+        run: |
+          python3 run_all_and_update_results.py \
+            --serenity .. \
+            --test262 ../test262 \
+            --test262-parser-tests ../test262-parser-tests \
+            --results-json ../libjs-test262-data/test262/results.json \
+            --per-file-output ../libjs-test262-data/test262/per-file-master.json
+
+      - name: Run test-wasm
+        working-directory: libjs-test262
+        run: |
+          Build/_deps/lagom-build/bin/test-wasm --per-file Build/_deps/lagom-build/Userland/Libraries/LibWasm/Tests > ../libjs-test262-data/wasm/per-file-master.json || true
+          jq -nc -f /dev/stdin <<-EOF --slurpfile previous ../libjs-test262-data/wasm/results.json --slurpfile details ../libjs-test262-data/wasm/per-file-master.json > wasm-new-results.json
+            \$details[0] as \$details | \$previous[0] + [{
+              "commit_timestamp": $(git -C .. log -1 --format=%ct),
+              "run_timestamp": $(date +%s),
+              "versions": {
+                "serenity": "$(git -C .. rev-parse HEAD)"
+              },
+              "tests": {
+                "spectest": {
+                  "duration": (\$details.duration),
+                  "results": {
+                    "total": (\$details.results | keys | length),
+                    "passed": ([\$details.results | values[] | select(. == "PASSED")] | length),
+                    "failed": ([\$details.results | values[] | select(. == "FAILED")] | length),
+                    "skipped": ([\$details.results | values[] | select(. == "SKIPPED")] | length),
+                    "process_error": ([\$details.results | values[] | select(. == "PROCESS_ERROR")] | length)
+                  }
+                }
+              }
+            }]
+          EOF
+          mv wasm-new-results.json ../libjs-test262-data/wasm/results.json
+
+      - name: Compare test262 results
+        run: ./libjs-test262/per_file_result_diff.py -o old-libjs-test262-data/test262/per-file-master.json -n libjs-test262-data/test262/per-file-master.json
+
+      - name: Compare Wasm results
+        run: ./libjs-test262/per_file_result_diff.py -o old-libjs-test262-data/wasm/per-file-master.json -n libjs-test262-data/wasm/per-file-master.json
+
+      - name: Deploy to GitHub
+        uses: JamesIves/github-pages-deploy-action@v4.4.3
+        with:
+          git-config-name: BuggieBot
+          git-config-email: buggiebot@serenityos.org
+          branch: master
+          repository-name: SerenityOS/libjs-test262-data
+          token: ${{ secrets.BUGGIEBOT_TOKEN }}
+          folder: libjs-test262-data