diff --git a/tests/unit/project-sequencer-pane.test.tsx b/tests/unit/project-sequencer-pane.test.tsx
new file mode 100644
index 00000000..8efca3e3
--- /dev/null
+++ b/tests/unit/project-sequencer-pane.test.tsx
@@ -0,0 +1,110 @@
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+
+import {
+  createProjectGlobalControlTargetRef,
+  getControlTargetRefKey
+} from "../../src/controls/control-surface";
+import { createEmptyProjectDialogueLibrary } from "../../src/dialogues/project-dialogues";
+import { ProjectSequencerPane } from "../../src/app/ProjectSequencerPane";
+import {
+  createEmptyProjectScheduler,
+  createProjectScheduleRoutine
+} from "../../src/scheduler/project-scheduler";
+import { createEmptyProjectSequenceLibrary } from "../../src/sequencer/project-sequences";
+
+describe("ProjectSequencerPane", () => {
+  it("renders project event placements without crashing when they have no inline effects", () => {
+    const target = createProjectGlobalControlTargetRef();
+    const routine = createProjectScheduleRoutine({
+      id: "routine-project-events",
+      title: "Project Events",
+      target,
+      startHour: 9,
+      endHour: 17,
+      priority: 0,
+      effects: []
+    });
+    const scheduler = createEmptyProjectScheduler();
+    scheduler.routines[routine.id] = routine;
+
+    render(
+      <ProjectSequencerPane
+        mode="timeline"
+        onSetMode={vi.fn()}
+        targetOptions={[
+          {
+            key: getControlTargetRefKey(target),
+            target,
+            label: "Project Events",
+            subtitle: "One-shot project events",
+            groupLabel: "Project",
+            defaults: {}
+          }
+        ]}
+        teleportTargetOptions={[]}
+        sceneTransitionTargetOptions={[]}
+        visibilityTargetOptions={[]}
+        modelAnimationTargetOptions={[]}
+        soundTargetOptions={[]}
+        scheduler={scheduler}
+        sequences={createEmptyProjectSequenceLibrary()}
+        dialogues={createEmptyProjectDialogueLibrary()}
+        selectedRoutineId={routine.id}
+        selectedSequenceId={null}
+        onSelectRoutine={vi.fn()}
+        onSelectSequence={vi.fn()}
+        onAddRoutine={vi.fn()}
+        onAddSequence={vi.fn()}
+        onDeleteRoutine={vi.fn()}
+        onDeleteSequence={vi.fn()}
+        onClose={vi.fn()}
+        onSetRoutineTarget={vi.fn()}
+        onSetRoutineTitle={vi.fn()}
+        onSetRoutineEnabled={vi.fn()}
+        onSetRoutineStartHour={vi.fn()}
+        onSetRoutineEndHour={vi.fn()}
+        onSetRoutinePriority={vi.fn()}
+        onSetRoutineSequenceId={vi.fn()}
+        onSetRoutineEffectOption={vi.fn()}
+        onSetRoutineNumericValue={vi.fn()}
+        onSetRoutineColorValue={vi.fn()}
+        onSetRoutineAnimationClip={vi.fn()}
+        onSetRoutineAnimationLoop={vi.fn()}
+        onSetActorRoutinePresence={vi.fn()}
+        onSetActorRoutineAnimationClip={vi.fn()}
+        onSetActorRoutineAnimationLoop={vi.fn()}
+        onSetActorRoutinePath={vi.fn()}
+        onSetActorRoutinePathSpeed={vi.fn()}
+        onSetActorRoutinePathLoop={vi.fn()}
+        onSetSequenceTitle={vi.fn()}
+        onAddHeldControlStep={vi.fn()}
+        onAddImpulseControlStep={vi.fn()}
+        onAddDialogueStep={vi.fn()}
+        onAddTeleportStep={vi.fn()}
+        onAddSceneTransitionStep={vi.fn()}
+        onAddVisibilityStep={vi.fn()}
+        onAddPlayAnimationStep={vi.fn()}
+        onAddStopAnimationStep={vi.fn()}
+        onAddPlaySoundStep={vi.fn()}
+        onAddStopSoundStep={vi.fn()}
+        onDeleteStep={vi.fn()}
+        onSetControlStepTarget={vi.fn()}
+        onSetControlStepEffectOption={vi.fn()}
+        onSetControlStepNumericValue={vi.fn()}
+        onSetControlStepColorValue={vi.fn()}
+        onSetControlStepAnimationClip={vi.fn()}
+        onSetControlStepAnimationLoop={vi.fn()}
+        onSetDialogueStepDialogueId={vi.fn()}
+        onSetTeleportStepTarget={vi.fn()}
+        onSetSceneTransitionStepTarget={vi.fn()}
+        onSetVisibilityStepTarget={vi.fn()}
+        onSetVisibilityStepMode={vi.fn()}
+      />
+    );
+
+    expect(
+      screen.getByText(/Project event placements run attached sequences only/i)
+    ).toBeVisible();
+  });
+});