diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
new file mode 100644
index 0000000..771551f
--- /dev/null
+++ b/.gitea/workflows/build.yaml
@@ -0,0 +1,16 @@
+name: build
+on:
+  push:
+    branches: ['**']
+    tags: ['v*']
+jobs:
+  macos:
+    uses: self:KofTwentyTwo/ci-workflows/.gitea/workflows/macos.yaml@v1
+    secrets: inherit
+    with:
+      # Build only: the app and the test bundle are compiled unsigned, the tests are not run. They are
+      # app-hosted XCTests and the grogu runner has no GUI session for testmanagerd; run `just test`
+      # locally before merging (README, Building from Source). Package.swift has no test target.
+      commands: |
+        xcodegen generate
+        xcodebuild -quiet -project markdownViewr.xcodeproj -scheme markdownViewr -destination 'platform=macOS' CODE_SIGNING_ALLOWED=NO build-for-testing
diff --git a/README.md b/README.md
index c373514..caa7000 100644
--- a/README.md
+++ b/README.md
@@ -61,3 +61,12 @@ just run
 ```
 
 `just --list` shows all available recipes.
+
+### Tests
+
+The tests are app-hosted XCTests (`markdownViewrTests`). CI builds the app and the test bundle unsigned
+but does not run them (the CI macOS runner has no GUI session), so run them locally before merging:
+
+```bash
+just test   # xcodegen generate first if the project is stale
+```
diff --git a/markdownViewr/MarkdownDocument.swift b/markdownViewr/MarkdownDocument.swift
index 212caf9..df800f0 100644
--- a/markdownViewr/MarkdownDocument.swift
+++ b/markdownViewr/MarkdownDocument.swift
@@ -275,7 +275,7 @@ struct MarkdownDocument: FileDocument {
 private struct HTMLConverter: MarkupWalker {
     private var result = ""
 
-    mutating func visit(_ document: Document) -> String {
+    mutating func visit(_ document: Markdown.Document) -> String {
         result = ""
         for child in document.children {
             visitChild(child)