diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4c7d5d5..641f259 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,13 +10,24 @@ on:
       - main
 
 jobs:
-  sbt-build:
+  test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: coursier/cache-action@v6
-      - uses: olafurpg/setup-scala@v11
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup JDK
+        uses: actions/setup-java@v3
         with:
-          java-version: adopt@1.11
+          distribution: corretto
+          java-version: 11
+          cache: sbt
       - name: Build and Test
-        run: sbt ++test
+        run: sbt -v +test +publishLocal
+      - name: Check that example app compiles
+        working-directory: ./example/webapp
+        run: sbt -v +test
+      - name: Test Summary
+        uses: test-summary/action@v2
+        with:
+          paths: "test-results/**/TEST-*.xml"
+        if: always()
diff --git a/.gitignore b/.gitignore
index 67059da..00bda0e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,6 @@ target/
 .idea/
 *.log
 .bsp/
+
+/test-results/
+.DS_Store
diff --git a/build.sbt b/build.sbt
index 4087a69..7a7b6fc 100644
--- a/build.sbt
+++ b/build.sbt
@@ -35,6 +35,8 @@ def projectWithPlayVersion(playVersion: PlayVersion) =
     crossScalaVersions := Seq(scalaVersion.value) ++ (if (playVersion.supportsScala3) Seq("3.3.1") else Seq.empty),
     scalacOptions ++= Seq("-feature", "-deprecation"),
     Compile / unmanagedSourceDirectories += baseDirectory.value / playVersion.pekkoOrAkkaSrcFolder,
+    Test / testOptions +=
+      Tests.Argument(TestFrameworks.ScalaTest, "-u", s"test-results/scala-${scalaVersion.value}", "-o"),
 
     libraryDependencies ++= Seq(
       "com.gu.play-secret-rotation" %% "core" % "0.40",
diff --git a/play-v27/src/sbt-test/example/webapp/app/AppComponents.scala b/example/webapp/app/AppComponents.scala
similarity index 92%
rename from play-v27/src/sbt-test/example/webapp/app/AppComponents.scala
rename to example/webapp/app/AppComponents.scala
index bb695cf..08da7dd 100644
--- a/play-v27/src/sbt-test/example/webapp/app/AppComponents.scala
+++ b/example/webapp/app/AppComponents.scala
@@ -21,7 +21,7 @@ class AppComponents(context: ApplicationLoader.Context)
     clientId = configuration.get[String]("your.clientId.config.path"),
     clientSecret = configuration.get[String]("your.clientSecret.config.path"),
     redirectUrl = configuration.get[String]("your.redirectUrl.config.path"),
-    domain = configuration.get[String]("your.apps-domain.config.path"),
+    domains = List(configuration.get[String]("your.apps-domain.config.path")),
     antiForgeryChecker = AntiForgeryChecker.borrowSettingsFromPlay(httpConfiguration)
   )
 
@@ -31,7 +31,7 @@ class AppComponents(context: ApplicationLoader.Context)
   val googleServiceAccount = GoogleServiceAccount(googleCredential.getServiceAccountId, googleCredential.getServiceAccountPrivateKey, "service.account@mydomain.com")
   val googleGroupChecker = new GoogleGroupChecker(googleServiceAccount)
 
-  val authAction = new AuthAction[AnyContent](googleAuthConfig, routes.Login.loginAction(), controllerComponents.parsers.default)(executionContext)
+  val authAction = new AuthAction[AnyContent](googleAuthConfig, routes.Login.loginAction, controllerComponents.parsers.default)(executionContext)
 
   val login = new Login(requiredGoogleGroups, googleAuthConfig, googleGroupChecker, wsClient, controllerComponents)(executionContext)
   val appController = new Application(authAction, requiredGoogleGroups, googleAuthConfig, googleGroupChecker, controllerComponents)(executionContext)
diff --git a/play-v27/src/sbt-test/example/webapp/app/AppLoader.scala b/example/webapp/app/AppLoader.scala
similarity index 100%
rename from play-v27/src/sbt-test/example/webapp/app/AppLoader.scala
rename to example/webapp/app/AppLoader.scala
diff --git a/play-v27/src/sbt-test/example/webapp/app/controllers/Application.scala b/example/webapp/app/controllers/Application.scala
similarity index 94%
rename from play-v27/src/sbt-test/example/webapp/app/controllers/Application.scala
rename to example/webapp/app/controllers/Application.scala
index 318d048..54c47c4 100644
--- a/play-v27/src/sbt-test/example/webapp/app/controllers/Application.scala
+++ b/example/webapp/app/controllers/Application.scala
@@ -4,7 +4,6 @@ import com.gu.googleauth
 import com.gu.googleauth.{AuthAction, Filters, GoogleAuthConfig, GoogleGroupChecker}
 import play.api.mvc.Security.AuthenticatedRequest
 import play.api.mvc._
-import com.google.api.client.auth.oauth2.GoogleCredential
 
 import scala.concurrent.ExecutionContext
 
diff --git a/play-v27/src/sbt-test/example/webapp/app/controllers/Login.scala b/example/webapp/app/controllers/Login.scala
similarity index 91%
rename from play-v27/src/sbt-test/example/webapp/app/controllers/Login.scala
rename to example/webapp/app/controllers/Login.scala
index 69d55b8..979452d 100644
--- a/play-v27/src/sbt-test/example/webapp/app/controllers/Login.scala
+++ b/example/webapp/app/controllers/Login.scala
@@ -38,9 +38,9 @@ class Login(requiredGoogleGroups: Set[String], val authConfig: GoogleAuthConfig,
   }
 
   def logout = Action { implicit request =>
-    Redirect(routes.Application.index()).withNewSession
+    Redirect(routes.Application.index).withNewSession
   }
 
-  override val failureRedirectTarget: Call = routes.Login.login()
-  override val defaultRedirectTarget: Call = routes.Application.authenticated()
+  override val failureRedirectTarget: Call = routes.Login.login
+  override val defaultRedirectTarget: Call = routes.Application.authenticated
 }
diff --git a/play-v27/src/sbt-test/example/webapp/app/views/authenticated.scala.html b/example/webapp/app/views/authenticated.scala.html
similarity index 85%
rename from play-v27/src/sbt-test/example/webapp/app/views/authenticated.scala.html
rename to example/webapp/app/views/authenticated.scala.html
index 52ea0ed..89884de 100644
--- a/play-v27/src/sbt-test/example/webapp/app/views/authenticated.scala.html
+++ b/example/webapp/app/views/authenticated.scala.html
@@ -18,7 +18,7 @@ <h1>Authorised</h1>
             <p><img class="avatar" src="@avatarUrl" alt="@request.user.firstName" /></p>
         }
         <p>The expiry time is @{Instant.ofEpochSecond(request.user.exp)}</p>
-        <p>You can go to the <a href="@routes.Login.login()">login page</a>
-            or <a href="@routes.Login.logout()">logout</a>.</p>
+        <p>You can go to the <a href="@routes.Login.login">login page</a>
+            or <a href="@routes.Login.logout">logout</a>.</p>
     </body>
 </html>
\ No newline at end of file
diff --git a/example/webapp/app/views/index.scala.html b/example/webapp/app/views/index.scala.html
new file mode 100644
index 0000000..e944fce
--- /dev/null
+++ b/example/webapp/app/views/index.scala.html
@@ -0,0 +1,12 @@
+@(request: Request[AnyContent], error: Option[String] = None)
+
+<html>
+    <head><title>Home</title></head>
+    <body>
+        <h1>Home page</h1>
+        <p>This is the home page of the example application.</p>
+        <p>You can go to the <a href="@routes.Login.login">login page</a>,
+            a <a href="@routes.Application.authenticated">page that requires authentication</a>,
+            or <a href="@routes.Login.logout">logout</a>.</p>
+    </body>
+</html>
\ No newline at end of file
diff --git a/play-v27/src/sbt-test/example/webapp/app/views/login.scala.html b/example/webapp/app/views/login.scala.html
similarity index 72%
rename from play-v27/src/sbt-test/example/webapp/app/views/login.scala.html
rename to example/webapp/app/views/login.scala.html
index 29da1fd..40803f6 100644
--- a/play-v27/src/sbt-test/example/webapp/app/views/login.scala.html
+++ b/example/webapp/app/views/login.scala.html
@@ -9,10 +9,10 @@ <h1>Login Page</h1>
         @error.map { message =>
             <p>The error was: @message</p>
         }
-        <form action="@routes.Login.loginAction()" method="get">
+        <form action="@routes.Login.loginAction" method="get">
             <input value="Log In" type="submit">
         </form>
-        <p>You can also go to a <a href="@routes.Application.authenticated()">page that requires authentication</a>
-            or <a href="@routes.Login.logout()">logout</a>.</p>
+        <p>You can also go to a <a href="@routes.Application.authenticated">page that requires authentication</a>
+            or <a href="@routes.Login.logout">logout</a>.</p>
     </body>
 </html>
\ No newline at end of file
diff --git a/play-v27/src/sbt-test/example/webapp/build.sbt b/example/webapp/build.sbt
similarity index 61%
rename from play-v27/src/sbt-test/example/webapp/build.sbt
rename to example/webapp/build.sbt
index dbe8a44..8df7435 100644
--- a/play-v27/src/sbt-test/example/webapp/build.sbt
+++ b/example/webapp/build.sbt
@@ -1,9 +1,9 @@
 name := "play-googleauth-example"
 
-scalaVersion := "2.12.16"
+scalaVersion := "2.13.12"
 
 libraryDependencies ++= Seq(
-  "com.gu" %% "play-googleauth" % version.value,
+  "com.gu.play-googleauth" %% "play-v30" % version.value,
   ws
 )
 
diff --git a/play-v27/src/sbt-test/example/webapp/conf/application.conf b/example/webapp/conf/application.conf
similarity index 100%
rename from play-v27/src/sbt-test/example/webapp/conf/application.conf
rename to example/webapp/conf/application.conf
diff --git a/play-v27/src/sbt-test/example/webapp/conf/routes b/example/webapp/conf/routes
similarity index 100%
rename from play-v27/src/sbt-test/example/webapp/conf/routes
rename to example/webapp/conf/routes
diff --git a/example/webapp/project/build.properties b/example/webapp/project/build.properties
new file mode 100644
index 0000000..e8a1e24
--- /dev/null
+++ b/example/webapp/project/build.properties
@@ -0,0 +1 @@
+sbt.version=1.9.7
diff --git a/example/webapp/project/plugins.sbt b/example/webapp/project/plugins.sbt
new file mode 100644
index 0000000..b2a6bbf
--- /dev/null
+++ b/example/webapp/project/plugins.sbt
@@ -0,0 +1,2 @@
+// Use the Play sbt plugin for Play projects
+addSbtPlugin("org.playframework" % "sbt-plugin" % "3.0.0")
diff --git a/play-v27/src/sbt-test/example/webapp/test b/example/webapp/test
similarity index 100%
rename from play-v27/src/sbt-test/example/webapp/test
rename to example/webapp/test
diff --git a/example/webapp/version.sbt b/example/webapp/version.sbt
new file mode 100644
index 0000000..28229e7
--- /dev/null
+++ b/example/webapp/version.sbt
@@ -0,0 +1 @@
+ThisBuild / version := "2.3.1-SNAPSHOT"
diff --git a/play-v27/src/sbt-test/example/webapp/app/views/index.scala.html b/play-v27/src/sbt-test/example/webapp/app/views/index.scala.html
deleted file mode 100644
index 32769ea..0000000
--- a/play-v27/src/sbt-test/example/webapp/app/views/index.scala.html
+++ /dev/null
@@ -1,12 +0,0 @@
-@(request: Request[AnyContent], error: Option[String] = None)
-
-<html>
-    <head><title>Home</title></head>
-    <body>
-        <h1>Home page</h1>
-        <p>This is the home page of the example application.</p>
-        <p>You can go to the <a href="@routes.Login.login()">login page</a>,
-            a <a href="@routes.Application.authenticated()">page that requires authentication</a>,
-            or <a href="@routes.Login.logout()">logout</a>.</p>
-    </body>
-</html>
\ No newline at end of file
diff --git a/play-v27/src/sbt-test/example/webapp/project/build.properties b/play-v27/src/sbt-test/example/webapp/project/build.properties
deleted file mode 100644
index d6e3507..0000000
--- a/play-v27/src/sbt-test/example/webapp/project/build.properties
+++ /dev/null
@@ -1 +0,0 @@
-sbt.version=1.1.6
diff --git a/play-v27/src/sbt-test/example/webapp/project/plugins.sbt b/play-v27/src/sbt-test/example/webapp/project/plugins.sbt
deleted file mode 100644
index dd3c274..0000000
--- a/play-v27/src/sbt-test/example/webapp/project/plugins.sbt
+++ /dev/null
@@ -1,5 +0,0 @@
-// The Typesafe repository
-resolvers += Resolver.typesafeIvyRepo("releases")
-
-// Use the Play sbt plugin for Play projects
-addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.6.17")
diff --git a/play-v27/src/sbt-test/example/webapp/version.sbt b/play-v27/src/sbt-test/example/webapp/version.sbt
deleted file mode 120000
index 6269cc7..0000000
--- a/play-v27/src/sbt-test/example/webapp/version.sbt
+++ /dev/null
@@ -1 +0,0 @@
-../../../../version.sbt
\ No newline at end of file