diff --git a/.github/workflows/playwright.yml b/.github/workflows/playwright.yml
index f5b8dbf6..85369f6c 100644
--- a/.github/workflows/playwright.yml
+++ b/.github/workflows/playwright.yml
@@ -2,9 +2,15 @@ name: Playwright
 
 on:
   push:
+    branches:
+    - main
   pull_request:
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/prettier.yml b/.github/workflows/prettier.yml
index d92ab82b..fa7ec6aa 100644
--- a/.github/workflows/prettier.yml
+++ b/.github/workflows/prettier.yml
@@ -1,6 +1,15 @@
 name: Check JavaScript for conformance with Prettier
 
-on: [push]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 permissions:
   contents: read
diff --git a/.github/workflows/spellcheck.yml b/.github/workflows/spellcheck.yml
index 58635025..aa35338f 100644
--- a/.github/workflows/spellcheck.yml
+++ b/.github/workflows/spellcheck.yml
@@ -1,6 +1,15 @@
 name: Check spelling in documentation
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 permissions:
   contents: read
diff --git a/.github/workflows/test-coverage.yml b/.github/workflows/test-coverage.yml
deleted file mode 100644
index e9bd4bab..00000000
--- a/.github/workflows/test-coverage.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-name: Calculate test coverage
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
-permissions:
-  contents: read
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Check out datasette
-      uses: actions/checkout@v7
-    - name: Set up Python
-      uses: actions/setup-python@v6
-      with:
-        python-version: '3.12'
-        cache: 'pip'
-        cache-dependency-path: '**/pyproject.toml'
-    - name: Install Python dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install . --group dev
-        python -m pip install pytest-cov
-    - name: Run tests
-      run: |-
-        ls -lah
-        cat .coveragerc
-        pytest -m "not serial" --cov=datasette --cov-config=.coveragerc --cov-report xml:coverage.xml --cov-report term -x
-        ls -lah
-    - name: Upload coverage report
-      uses: codecov/codecov-action@v1
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        file: coverage.xml
diff --git a/.github/workflows/test-pyodide.yml b/.github/workflows/test-pyodide.yml
index 5e81ed82..449855f3 100644
--- a/.github/workflows/test-pyodide.yml
+++ b/.github/workflows/test-pyodide.yml
@@ -2,9 +2,15 @@ name: Test in Pyodide with shot-scraper
 
 on:
   push:
+    branches:
+    - main
   pull_request:
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/test-sqlite-support.yml b/.github/workflows/test-sqlite-support.yml
index 2fdb3a40..700f3cce 100644
--- a/.github/workflows/test-sqlite-support.yml
+++ b/.github/workflows/test-sqlite-support.yml
@@ -1,6 +1,15 @@
 name: Test SQLite versions
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 permissions:
   contents: read
@@ -12,10 +21,10 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.13"]
         sqlite-version: [
           #"3", # latest version
-          "3.46",
+          #"3.46",
           #"3.45",
           #"3.27",
           #"3.26",
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2a8c0ae4..8176a630 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,6 +1,15 @@
 name: Test
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 permissions:
   contents: read
@@ -12,6 +21,9 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
+        include:
+        - python-version: "3.14"
+          coverage: true
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python ${{ matrix.python-version }}
@@ -29,12 +41,27 @@ jobs:
       run: |
         pip install . --group dev
         pip freeze
+    - name: Install pytest-cov
+      if: ${{ matrix.coverage }}
+      run: pip install pytest-cov
     - name: Run tests
       run: |
-        pytest -n auto -m "not serial"
-        pytest -m "serial"
+        if [ "${{ matrix.coverage }}" = "true" ]; then
+          COV="--cov=datasette --cov-config=.coveragerc"
+          pytest -n auto -m "not serial" $COV --cov-report=
+          pytest -m "serial" $COV --cov-append --cov-report xml:coverage.xml --cov-report term
+        else
+          pytest -n auto -m "not serial"
+          pytest -m "serial"
+        fi
         # And the test that exceeds a localhost HTTPS server
         tests/test_datasette_https_server.sh
+    - name: Upload coverage report
+      if: ${{ matrix.coverage }}
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: coverage.xml
     - name: Black
       run: |
         black --version