diff --git a/service/src/test/kotlin/app/cash/backfila/ui/components/DashboardPageLayoutTest.kt b/service/src/test/kotlin/app/cash/backfila/ui/components/DashboardPageLayoutTest.kt
new file mode 100644
index 000000000..a858f42bb
--- /dev/null
+++ b/service/src/test/kotlin/app/cash/backfila/ui/components/DashboardPageLayoutTest.kt
@@ -0,0 +1,98 @@
+package app.cash.backfila.ui.components
+
+import app.cash.backfila.BackfilaTestingModule
+import com.google.inject.Provider
+import jakarta.inject.Inject
+import misk.Action
+import misk.MiskCaller
+import misk.api.HttpRequest
+import misk.inject.KAbstractModule
+import misk.inject.toKey
+import misk.scope.ActionScope
+import misk.scope.ActionScopedProviderModule
+import misk.security.authz.MiskCallerAuthenticator
+import misk.testing.MiskTest
+import misk.testing.MiskTestModule
+import misk.web.FakeHttpCall
+import misk.web.HttpCall
+import misk.web.dashboard.BaseDashboardModule
+import misk.web.v2.DashboardPageLayout
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import org.junit.jupiter.api.Test
+import javax.servlet.http.HttpServletRequest
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+
+@MiskTest
+class DashboardPageLayoutTest {
+  @MiskTestModule
+  private val module = TestModule()
+
+  @Inject
+  lateinit var actionScope: ActionScope
+
+  @Inject
+  lateinit var layout: Provider<DashboardPageLayout>
+
+  private val fakeHttpCall = FakeHttpCall(url = "http://foobar.com/abc/123".toHttpUrl())
+  private val fakeMiskCaller = MiskCaller(user = "test-user")
+
+  @Test
+  fun `happy path`() {
+    actionScope.enter(
+      mapOf(
+        HttpCall::class.toKey() to fakeHttpCall,
+        MiskCaller::class.toKey() to fakeMiskCaller
+      )
+    ).use {
+      // No exception thrown on correct usage
+      layout.get().newBuilder().build()
+    }
+  }
+
+  @Test
+  fun `no builder reuse permitted`() {
+    actionScope.enter(
+      mapOf(
+        HttpCall::class.toKey() to fakeHttpCall,
+        MiskCaller::class.toKey() to MiskCaller(user = "test-user"),
+      ),
+    ).use {
+      // Fresh builder must have newBuilder() called
+      val e1 = assertFailsWith<IllegalStateException> { layout.get().build() }
+      assertEquals(
+        "You must call newBuilder() before calling build() to prevent builder reuse.", e1.message,
+      )
+
+      // No builder reuse
+      val e2 = assertFailsWith<IllegalStateException> {
+        val newBuilder = layout.get().newBuilder()
+        newBuilder.build()
+        // Not allowed to call build() twice on same builder
+        newBuilder.build()
+      }
+      assertEquals(
+        "You must call newBuilder() before calling build() to prevent builder reuse.", e2.message,
+      )
+    }
+  }
+
+  class TestModule : KAbstractModule() {
+    override fun configure() {
+      install(BackfilaTestingModule())
+      install(BaseDashboardModule(true))
+
+      install(
+        object : ActionScopedProviderModule() {
+          override fun configureProviders() {
+            bindSeedData(HttpCall::class)
+            bindSeedData(HttpRequest::class)
+            bindSeedData(HttpServletRequest::class)
+            bindSeedData(Action::class)
+            newMultibinder<MiskCallerAuthenticator>()
+          }
+        },
+      )
+    }
+  }
+}