diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c7c9805..ba82cd3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,11 +3,15 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
       - '*'
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     name: MacOS
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
new file mode 100644
index 0000000..fa9bde8
--- /dev/null
+++ b/.github/workflows/format.yml
@@ -0,0 +1,31 @@
+name: Format
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: format-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  swift_format:
+    name: swift-format
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v3
+      - name: Xcode Select
+        run: sudo xcode-select -s /Applications/Xcode_14.0.1.app
+      - name: Tap
+        run: brew tap pointfreeco/formulae
+      - name: Install
+        run: brew install Formulae/swift-format@5.7
+      - name: Format
+        run: make format
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: Run swift-format
+          branch: 'main'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 515454d..69efab9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -69,5 +69,4 @@ fastlane/test_output
 
 .DS_Store
 Packages/*
-Package.resolved
 .swiftpm
diff --git a/Html.playground/Contents.swift b/Html.playground/Contents.swift
index 380c086..d414f09 100644
--- a/Html.playground/Contents.swift
+++ b/Html.playground/Contents.swift
@@ -115,28 +115,6 @@ render(unexclaim(document))
   )
 )
 
-// Based on https://html.spec.whatwg.org/multipage/grouping-content.html#the-dl-element
-let dl_exmaple_with_div: Node = .dl(
-    .div(
-        .dt("Last modified time"),
-        .dd("2004-12-23T23:33Z")
-    ),
-    .div(
-        .dt("Recommended update interval"),
-        .dd("60s")
-    ),
-    .div(
-        .dt("Authors"),
-        .dt("Editors"),
-        .dd("Robert Rothman"),
-        .dd("Daniel Jackson")
-    )
-)
-
-render(dl_exmaple_with_div)
-
-
-
 /// A function that "redacts" an HTML document by transforming all text nodes
 /// into █-sequences of characters.
 func redacted(node: Node) -> Node {
diff --git a/Makefile b/Makefile
index 363d3e3..47cdfee 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,8 @@ test-linux:
 		--rm \
 		-v "$(PWD):$(PWD)" \
 		-w "$(PWD)" \
-		swift:5.3 \
-		bash -c 'make test-swift'
+		swift:5.7-focal \
+		bash -c 'swift test'
 
 test-macos: xcodeproj
 	set -o pipefail && \
diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..b4b8f7e
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "swift-snapshot-testing",
+        "repositoryURL": "https://github.com/pointfreeco/swift-snapshot-testing.git",
+        "state": {
+          "branch": null,
+          "revision": "cef5b3f6f11781dd4591bdd1dd0a3d22bd609334",
+          "version": "1.11.0"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
index b51013a..a855819 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:5.5
 import PackageDescription
 
 let package = Package(
@@ -17,7 +17,7 @@ let package = Package(
       targets: ["HtmlSnapshotTesting"]),
   ],
   dependencies: [
-    .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.10.0"),
+    .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.11.0"),
   ],
   targets: [
     .target(
diff --git a/Sources/Html/ChildOf.swift b/Sources/Html/ChildOf.swift
index 4b953a0..6aff8a7 100644
--- a/Sources/Html/ChildOf.swift
+++ b/Sources/Html/ChildOf.swift
@@ -89,10 +89,11 @@ extension ChildOf where Element == Tag.Dl {
   }
 }
 
-// https://html.spec.whatwg.org/multipage/grouping-content.html#the-dl-element
 extension ChildOf where Element == Tag.Dl {
   /// The `<div>` element wraps a group, that is part of a term-description group in a description list (`<dl>` element).
   ///
+  /// This is allowed according to the HTML spec: // https://html.spec.whatwg.org/multipage/grouping-content.html#the-dl-element
+  ///
   /// - Parameters:
   ///   - attributes: Attributes.
   ///   - content: Child nodes (`<dl>` or `dd` elements).
diff --git a/Tests/HtmlTests/ElementsTests.swift b/Tests/HtmlTests/ElementsTests.swift
index 32c292f..2dbe966 100644
--- a/Tests/HtmlTests/ElementsTests.swift
+++ b/Tests/HtmlTests/ElementsTests.swift
@@ -5,12 +5,12 @@ final class ElementsTests: XCTestCase {
   func testBase64Snapshot() {
     XCTAssertEqual(
       """
-<img src="data:image/png;base64,ZnVuY3Rpb25z" alt class="fun">
-""",
+      <img src="data:image/png;base64,ZnVuY3Rpb25z" alt class="fun">
+      """,
       render(.img(base64: "ZnVuY3Rpb25z", type: .image(.png), alt: "", attributes: [.class("fun")]))
     )
   }
-  
+
   func testXmlRender() {
     XCTAssertEqual(
       #"""
@@ -21,30 +21,30 @@ final class ElementsTests: XCTestCase {
       )
     )
   }
-    
-    func testDlwithDiv() {
-        let dl_exmaple_with_div: Node = .dl(
-            .div(
-                .dt("Last modified time"),
-                .dd("2004-12-23T23:33Z")
-            ),
-            .div(
-                .dt("Recommended update interval"),
-                .dd("60s")
-            ),
-            .div(
-                .dt("Authors"),
-                .dt("Editors"),
-                .dd("Robert Rothman"),
-                .dd("Daniel Jackson")
-            )
-        )
-        
-        XCTAssertEqual(
-            """
-            <dl><div><dt>Last modified time</dt><dd>2004-12-23T23:33Z</dd></div><div><dt>Recommended update interval</dt><dd>60s</dd></div><div><dt>Authors</dt><dt>Editors</dt><dd>Robert Rothman</dd><dd>Daniel Jackson</dd></div></dl>
-            """,
-            render(dl_exmaple_with_div)
-        )
-    }
+
+  func testDiv_InsideDL() {
+    let doc = Node.dl(
+      .div(
+        .dt("Last modified time"),
+        .dd("2004-12-23T23:33Z")
+      ),
+      .div(
+        .dt("Recommended update interval"),
+        .dd("60s")
+      ),
+      .div(
+        .dt("Authors"),
+        .dt("Editors"),
+        .dd("Robert Rothman"),
+        .dd("Daniel Jackson")
+      )
+    )
+
+    XCTAssertEqual(
+      """
+      <dl><div><dt>Last modified time</dt><dd>2004-12-23T23:33Z</dd></div><div><dt>Recommended update interval</dt><dd>60s</dd></div><div><dt>Authors</dt><dt>Editors</dt><dd>Robert Rothman</dd><dd>Daniel Jackson</dd></div></dl>
+      """,
+      render(doc)
+    )
+  }
 }