diff --git a/src/lib/query-keys/__tests__/record-write-day-keys.test.ts b/src/lib/query-keys/__tests__/record-write-day-keys.test.ts
index 64f54253a..4d9133d52 100644
--- a/src/lib/query-keys/__tests__/record-write-day-keys.test.ts
+++ b/src/lib/query-keys/__tests__/record-write-day-keys.test.ts
@@ -11,6 +11,7 @@ import { describe, expect, it } from "vitest";
 import { invalidateSymptomReads } from "@/components/symptoms/use-symptoms";
 import {
   allergyDependentKeys,
+  invalidateKeys,
   cycleDependentKeys,
   documentDependentKeys,
   encounterDependentKeys,
@@ -47,6 +48,20 @@ describe("record writes reach the day view and the timeline", () => {
     },
   );
 
+  it("a workout write marks the Insights presence read stale", async () => {
+    // The Workouts pill appears with the first workout and goes with the
+    // last; the presence read otherwise stays fresh for five minutes.
+    const client = new QueryClient();
+    client.setQueryData(queryKeys.insightsPresence(), { hasWorkouts: false });
+
+    await invalidateKeys(client, workoutDependentKeys);
+
+    expect(
+      client.getQueryState(queryKeys.insightsPresence())?.isInvalidated,
+    ).toBe(true);
+    client.clear();
+  });
+
   it("a symptom write marks an open day and the timeline stale", async () => {
     const client = new QueryClient();
     const day = queryKeys.day("2026-11-10");
diff --git a/src/lib/query-keys/index.ts b/src/lib/query-keys/index.ts
index 57e244539..25b6195f0 100644
--- a/src/lib/query-keys/index.ts
+++ b/src/lib/query-keys/index.ts
@@ -364,10 +364,12 @@ export const vaccinationDependentKeys = [
  * digest names a workout that just arrived and the write evicts the server's
  * daily caches, so the daily reads ride along; pair call sites with
  * `refetchInactiveDailyReads`, because both are unmounted wherever the form
- * opens outside the dashboard.
+ * opens outside the dashboard. The Insights tab strip shows the Workouts
+ * pill from the presence read.
  */
 export const workoutDependentKeys = [
   queryKeys.workouts(),
+  queryKeys.insightsPresence(),
   queryKeys.dashboardSnapshot(),
   queryKeys.dailyDigest(),
   queryKeys.dayRoot(),