diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
deleted file mode 100644
index 9bb449e..0000000
--- a/.github/workflows/check.yml
+++ /dev/null
@@ -1,92 +0,0 @@
-# Borrowed from https://github.com/jonhoo/rust-ci-conf/blob/6332a3af21a58f811a681a98cd44d0f5da8a1891/.github/workflows/check.yml
-# See the [screencast] by Jon Gjengset.
-#
-# [screencast]: https://www.youtube.com/watch?v=xUH-4y92jPg
-
-name: check
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  fmt:
-    name: stable / fmt
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
-      - name: cargo fmt --check --all
-        run: cargo fmt --check --all
-        working-directory: rust/
-
-  clippy:
-    name: ${{ matrix.toolchain }} / clippy
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      checks: write
-    strategy:
-      fail-fast: false
-      matrix:
-        toolchain: [stable, beta]
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install ${{ matrix.toolchain }}
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.toolchain }}
-          components: clippy
-      - name: cargo clippy
-        uses: actions-rs/clippy-check@v1
-        with:
-          # Github Actions don't support `working-dir` in the `uses` context.
-          # Specify `--manifest-path` as a workaround.
-          #
-          # See https://github.com/actions-rs/clippy-check/issues/28
-          args: --all-features --workspace --manifest-path rust/Cargo.toml
-          token: ${{ secrets.GITHUB_TOKEN }}
-
-  doc:
-    name: nightly / doc
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install nightly
-        uses: dtolnay/rust-toolchain@nightly
-      - name: cargo doc
-        run: cargo doc --no-deps --all-features --document-private-items --workspace
-        working-directory: rust/
-
-  hack:
-    name: ubuntu / stable / features
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-      - name: cargo install cargo-hack
-        uses: taiki-e/install-action@cargo-hack
-      # Intentionally no target specifier; see https://github.com/jonhoo/rust-ci-conf/pull/4
-      - name: cargo hack
-        run: cargo hack --feature-powerset --workspace check
-        working-directory: rust/
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d7ed5e8..39aeb95 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,7 +23,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        toolchain: [stable, beta]
+        toolchain: [stable]
+        #XXX toolchain: [stable, beta]
     steps:
       - uses: actions/checkout@v4
         with:
@@ -32,6 +33,15 @@ jobs:
         uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.toolchain }}
+      - name: Install the latest stable `tshark`
+        # See https://launchpad.net/~wireshark-dev/+archive/ubuntu/stable
+        run: |
+          sudo apt update
+          sudo apt -y install software-properties-common  # provides `add-apt-repository`
+          sudo add-apt-repository --yes ppa:wireshark-dev/stable
+          sudo apt update
+          sudo apt -y install tshark
+          tshark --version
       - run: cargo generate-lockfile
         if: hashFiles('rust/Cargo.lock') == ''
       # https://twitter.com/jonhoo/status/1571290371124260865
@@ -42,44 +52,3 @@ jobs:
       - name: cargo test --doc
         run: cargo test --locked --all-features --doc --workspace
         working-directory: rust/
-
-  minimal:
-    name: ubuntu / stable / minimal-versions
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-      - name: Install nightly for -Zminimal-versions
-        uses: dtolnay/rust-toolchain@nightly
-      - run: rustup default stable
-      - run: cargo +nightly update -Zminimal-versions --workspace
-        working-directory: rust/
-      - run: cargo test --locked --all-features --all-targets --workspace
-        working-directory: rust/
-
-  os-check:
-    name: ${{ matrix.os }} / stable
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          # NOTE: Don't use GitHub-hosted macOS runners in a non-public repository --
-          # they consume CI/CD minutes like crazy; see
-          # https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions#minute-multipliers
-          - windows-latest
-          #- macos-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-      - run: cargo generate-lockfile
-        if: hashFiles('rust/Cargo.lock') == ''
-      - name: cargo test
-        run: cargo test --locked --all-features --all-targets --workspace
-        working-directory: rust/