diff --git a/tests/domain/project-sequence-templates.test.ts b/tests/domain/project-sequence-templates.test.ts
new file mode 100644
index 00000000..ac92ca20
--- /dev/null
+++ b/tests/domain/project-sequence-templates.test.ts
@@ -0,0 +1,89 @@
+import { describe, expect, it } from "vitest";
+
+import { createInteractionControlTargetRef } from "../../src/controls/control-surface";
+import { createDefaultInteractionProjectSequence } from "../../src/sequencer/project-sequence-templates";
+import type { ProjectDialogue } from "../../src/dialogues/project-dialogues";
+import type { ProjectScheduleTargetOption } from "../../src/scheduler/project-schedule-control-options";
+
+describe("project sequence templates", () => {
+  it("prefers a dialogue impulse step when a project dialogue exists", () => {
+    const dialogue: ProjectDialogue = {
+      id: "dialogue-merchant",
+      title: "Merchant",
+      lines: [
+        {
+          id: "dialogue-line-merchant-1",
+          speakerName: "Merchant",
+          text: "Fresh fruit."
+        }
+      ]
+    };
+
+    const sequence = createDefaultInteractionProjectSequence({
+      source: {
+        id: "entity-interactable-merchant",
+        kind: "interactable",
+        name: "Merchant Stall"
+      },
+      dialogues: [dialogue],
+      targetOptions: []
+    });
+
+    expect(sequence).toEqual(
+      expect.objectContaining({
+        title: "Merchant Stall Dialogue",
+        steps: [
+          {
+            stepClass: "impulse",
+            type: "startDialogue",
+            dialogueId: "dialogue-merchant"
+          }
+        ]
+      })
+    );
+  });
+
+  it("falls back to an impulse control step for the selected interactable when no dialogue exists", () => {
+    const targetOption: ProjectScheduleTargetOption = {
+      key: "interaction:interactable:entity-interactable-gate",
+      target: createInteractionControlTargetRef(
+        "interactable",
+        "entity-interactable-gate"
+      ),
+      label: "Gate Lever",
+      subtitle: "Main Scene",
+      groupLabel: "Interactions",
+      defaults: {}
+    };
+
+    const sequence = createDefaultInteractionProjectSequence({
+      source: {
+        id: "entity-interactable-gate",
+        kind: "interactable",
+        name: "Gate Lever"
+      },
+      dialogues: [],
+      targetOptions: [targetOption]
+    });
+
+    expect(sequence).toEqual(
+      expect.objectContaining({
+        title: "Gate Lever Sequence",
+        steps: [
+          {
+            stepClass: "impulse",
+            type: "controlEffect",
+            effect: {
+              type: "setInteractionEnabled",
+              target: createInteractionControlTargetRef(
+                "interactable",
+                "entity-interactable-gate"
+              ),
+              enabled: true
+            }
+          }
+        ]
+      })
+    );
+  });
+});