diff --git a/server/src/__tests__/routines-service.test.ts b/server/src/__tests__/routines-service.test.ts
index cbdf42ee70c..c0a87a256b2 100644
--- a/server/src/__tests__/routines-service.test.ts
+++ b/server/src/__tests__/routines-service.test.ts
@@ -207,16 +207,23 @@ describeEmbeddedPostgres("routine service live-execution coalescing", () => {
     return { companyId, agentId, issueSvc, projectId, routine, svc, wakeups };
   }
 
-  async function armWorktreeExecution(cutoff: Date, instanceId = "worktree-routines-test") {
-    await db.insert(instanceSettings).values({
-      singletonKey: "default",
-      general: {},
-      experimental: {
+  async function armWorktreeExecution(
+    cutoff: Date,
+    instanceId = "00000000-0000-4000-8000-000000000001",
+  ) {
+    const experimental = {
         enableWorktreeRunExecution: true,
+        worktreeRunExecutionInstanceNonce: instanceId,
         worktreeRunExecutionActivatedAt: cutoff.toISOString(),
         worktreeRunExecutionActivationInstanceId: instanceId,
-      },
-    });
+    };
+    await db
+      .insert(instanceSettings)
+      .values({ singletonKey: "default", general: {}, experimental })
+      .onConflictDoUpdate({
+        target: instanceSettings.singletonKey,
+        set: { experimental },
+      });
   }
 
   async function insertDispatchedRun(input: {