diff --git a/tests/features/stats/ObserverTab.test.tsx b/tests/features/stats/ObserverTab.test.tsx
index 1e60110..a6006f8 100644
--- a/tests/features/stats/ObserverTab.test.tsx
+++ b/tests/features/stats/ObserverTab.test.tsx
@@ -63,8 +63,8 @@ const H = 3_600_000;
 const point = (t: number, p: Partial<TelemetryPoint>): TelemetryPoint => ({
   t,
   batteryMv: null,
-  airtimeTxPct: null,
-  airtimeRxPct: null,
+  airtimeTxSecs: null,
+  airtimeRxSecs: null,
   noiseFloorDb: null,
   uptimeSeconds: null,
   queueLength: null,
@@ -75,7 +75,7 @@ const point = (t: number, p: Partial<TelemetryPoint>): TelemetryPoint => ({
 const telemetry: ObserverTelemetry = {
   range: "24h",
   interval: "1h",
-  points: [point(0, { airtimeRxPct: 100, airtimeTxPct: 10, batteryMv: 4100 }), point(H, { airtimeRxPct: 154, airtimeTxPct: 46, batteryMv: 4100 })],
+  points: [point(0, { airtimeRxSecs: 100, airtimeTxSecs: 10, batteryMv: 4100 }), point(H, { airtimeRxSecs: 154, airtimeTxSecs: 46, batteryMv: 4100 })],
 };
 
 const activity: ObserverActivity = {
@@ -135,7 +135,7 @@ describe("ObserverTab", () => {
   });
 
   it("leaves the header airtime stat out when the observer reports no telemetry", () => {
-    const zero = point(0, { airtimeRxPct: 0, airtimeTxPct: 0 });
+    const zero = point(0, { airtimeRxSecs: 0, airtimeTxSecs: 0 });
     telemetryResult.data = { ...telemetry, points: [zero, { ...zero, t: H }] };
     renderTab();
     expect(screen.queryByText(/RX 0%/)).not.toBeInTheDocument();
diff --git a/tests/features/stats/chart-options.test.ts b/tests/features/stats/chart-options.test.ts
index 3688c13..949f2d3 100644
--- a/tests/features/stats/chart-options.test.ts
+++ b/tests/features/stats/chart-options.test.ts
@@ -133,8 +133,8 @@ describe("leaderboardOption", () => {
 const point = (t: number, p: Partial<TelemetryPoint>): TelemetryPoint => ({
   t,
   batteryMv: null,
-  airtimeTxPct: null,
-  airtimeRxPct: null,
+  airtimeTxSecs: null,
+  airtimeRxSecs: null,
   noiseFloorDb: null,
   uptimeSeconds: null,
   queueLength: null,
@@ -146,9 +146,9 @@ const H = 3_600_000;
 
 describe("airtimeOption", () => {
   const points = [
-    point(0, { airtimeRxPct: 10, airtimeTxPct: 4 }),
-    point(H, { airtimeRxPct: 46, airtimeTxPct: 4 }), // +36 s over 1 h → 1%
-    point(3 * H, { airtimeRxPct: 40, airtimeTxPct: 76 }), // RX dips → clamp at 0; TX +72 s over 2 h → 1%
+    point(0, { airtimeRxSecs: 10, airtimeTxSecs: 4 }),
+    point(H, { airtimeRxSecs: 46, airtimeTxSecs: 4 }), // +36 s over 1 h → 1%
+    point(3 * H, { airtimeRxSecs: 40, airtimeTxSecs: 76 }), // RX dips → clamp at 0; TX +72 s over 2 h → 1%
   ];
 
   it("charts raw counters as percent of the wall-clock gap between reports", () => {
@@ -159,7 +159,7 @@ describe("airtimeOption", () => {
   });
 
   it("charts bucketed deltas as percent of the bucket width", () => {
-    const bucketed = [point(0, { airtimeRxPct: 216, airtimeTxPct: 0 }), point(6 * H, { airtimeRxPct: 0, airtimeTxPct: 1080 })];
+    const bucketed = [point(0, { airtimeRxSecs: 216, airtimeTxSecs: 0 }), point(6 * H, { airtimeRxSecs: 0, airtimeTxSecs: 1080 })];
     const opt = airtimeOption(bucketed, colors, 6 * H) as Record<string, any>;
     expect(opt.series[0].data).toEqual([[0, 1], [6 * H, 0]]);
     expect(opt.series[1].data).toEqual([[0, 0], [6 * H, 5]]);
diff --git a/tests/features/stats/has-telemetry.test.ts b/tests/features/stats/has-telemetry.test.ts
index 419301c..7093b3f 100644
--- a/tests/features/stats/has-telemetry.test.ts
+++ b/tests/features/stats/has-telemetry.test.ts
@@ -2,7 +2,7 @@ import { describe, it, expect } from "vitest";
 import { hasTelemetry } from "../../../src/features/stats/transforms";
 import type { TelemetryPoint } from "../../../src/features/stats/types";
 
-const empty = (t: number): TelemetryPoint => ({ t, batteryMv: null, airtimeTxPct: null, airtimeRxPct: null, noiseFloorDb: null, uptimeSeconds: null, queueLength: null, receiveErrors: null });
+const empty = (t: number): TelemetryPoint => ({ t, batteryMv: null, airtimeTxSecs: null, airtimeRxSecs: null, noiseFloorDb: null, uptimeSeconds: null, queueLength: null, receiveErrors: null });
 
 describe("hasTelemetry", () => {
   it("is false for no points", () => {
@@ -18,7 +18,7 @@ describe("hasTelemetry", () => {
   });
 
   it("is false when every metric is zero (bots / MQTT bridges report all-zero rows)", () => {
-    const allZero: TelemetryPoint = { t: 1, batteryMv: 0, airtimeTxPct: 0, airtimeRxPct: 0, noiseFloorDb: 0, uptimeSeconds: 0, queueLength: 0, receiveErrors: 0 };
+    const allZero: TelemetryPoint = { t: 1, batteryMv: 0, airtimeTxSecs: 0, airtimeRxSecs: 0, noiseFloorDb: 0, uptimeSeconds: 0, queueLength: 0, receiveErrors: 0 };
     expect(hasTelemetry([allZero, allZero])).toBe(false);
   });
 });
diff --git a/tests/features/stats/transforms.test.ts b/tests/features/stats/transforms.test.ts
index 1f35c56..cca413a 100644
--- a/tests/features/stats/transforms.test.ts
+++ b/tests/features/stats/transforms.test.ts
@@ -7,8 +7,8 @@ const H = 3_600_000;
 const point = (t: number, p: Partial<TelemetryPoint>): TelemetryPoint => ({
   t,
   batteryMv: null,
-  airtimeTxPct: null,
-  airtimeRxPct: null,
+  airtimeTxSecs: null,
+  airtimeRxSecs: null,
   noiseFloorDb: null,
   uptimeSeconds: null,
   queueLength: null,
@@ -46,46 +46,46 @@ describe("airtimePctSeries", () => {
   // raw points carry cumulative on-air seconds; the series is the increase as a percent of the
   // wall-clock gap between the two reports
   const raw = [
-    point(0, { airtimeRxPct: 10, airtimeTxPct: 4 }),
-    point(H, { airtimeRxPct: 46, airtimeTxPct: 4 }), // +36 s over 1 h
-    point(3 * H, { airtimeRxPct: 40, airtimeTxPct: 76 }), // rx reset, tx +72 s over 2 h
+    point(0, { airtimeRxSecs: 10, airtimeTxSecs: 4 }),
+    point(H, { airtimeRxSecs: 46, airtimeTxSecs: 4 }), // +36 s over 1 h
+    point(3 * H, { airtimeRxSecs: 40, airtimeTxSecs: 76 }), // rx reset, tx +72 s over 2 h
   ];
 
   it("divides each cumulative delta by the real gap to the previous report", () => {
-    expect(airtimePctSeries(raw, "airtimeRxPct", null)).toEqual([[H, 1], [3 * H, 0]]);
-    expect(airtimePctSeries(raw, "airtimeTxPct", null)).toEqual([[H, 0], [3 * H, 1]]);
+    expect(airtimePctSeries(raw, "airtimeRxSecs", null)).toEqual([[H, 1], [3 * H, 0]]);
+    expect(airtimePctSeries(raw, "airtimeTxSecs", null)).toEqual([[H, 0], [3 * H, 1]]);
   });
 
   it("leaves a gap when either side of a delta is missing", () => {
-    const withHole = [point(0, { airtimeRxPct: 10 }), point(H, { airtimeRxPct: null }), point(2 * H, { airtimeRxPct: 82 })];
-    expect(airtimePctSeries(withHole, "airtimeRxPct", null)).toEqual([[H, null], [2 * H, null]]);
+    const withHole = [point(0, { airtimeRxSecs: 10 }), point(H, { airtimeRxSecs: null }), point(2 * H, { airtimeRxSecs: 82 })];
+    expect(airtimePctSeries(withHole, "airtimeRxSecs", null)).toEqual([[H, null], [2 * H, null]]);
   });
 
   it("divides bucketed deltas by the bucket width", () => {
-    const bucketed = [point(0, { airtimeRxPct: 216 }), point(6 * H, { airtimeRxPct: 1080 })];
-    expect(airtimePctSeries(bucketed, "airtimeRxPct", 6 * H)).toEqual([[0, 1], [6 * H, 5]]);
+    const bucketed = [point(0, { airtimeRxSecs: 216 }), point(6 * H, { airtimeRxSecs: 1080 })];
+    expect(airtimePctSeries(bucketed, "airtimeRxSecs", 6 * H)).toEqual([[0, 1], [6 * H, 5]]);
   });
 
   it("rounds to three decimals so tooltips stay readable", () => {
-    const pts = [point(0, { airtimeRxPct: 0 }), point(H, { airtimeRxPct: 1 })]; // 1 s / 3600 s
-    expect(airtimePctSeries(pts, "airtimeRxPct", null)).toEqual([[H, 0.028]]);
+    const pts = [point(0, { airtimeRxSecs: 0 }), point(H, { airtimeRxSecs: 1 })]; // 1 s / 3600 s
+    expect(airtimePctSeries(pts, "airtimeRxSecs", null)).toEqual([[H, 0.028]]);
   });
 });
 
 describe("latestAirtimePct", () => {
   it("reports the last delta for raw points", () => {
-    const raw = [point(0, { airtimeRxPct: 10, airtimeTxPct: 4 }), point(H, { airtimeRxPct: 46, airtimeTxPct: 76 })];
+    const raw = [point(0, { airtimeRxSecs: 10, airtimeTxSecs: 4 }), point(H, { airtimeRxSecs: 46, airtimeTxSecs: 76 })];
     expect(latestAirtimePct(raw, null)).toEqual({ rx: 1, tx: 2 });
   });
 
   it("reports the last bucket for bucketed points", () => {
-    const bucketed = [point(0, { airtimeRxPct: 1, airtimeTxPct: 1 }), point(6 * H, { airtimeRxPct: 216, airtimeTxPct: 0 })];
+    const bucketed = [point(0, { airtimeRxSecs: 1, airtimeTxSecs: 1 }), point(6 * H, { airtimeRxSecs: 216, airtimeTxSecs: 0 })];
     expect(latestAirtimePct(bucketed, 6 * H)).toEqual({ rx: 1, tx: 0 });
   });
 
   it("is null when there is nothing to difference", () => {
     expect(latestAirtimePct([], null)).toEqual({ rx: null, tx: null });
-    expect(latestAirtimePct([point(0, { airtimeRxPct: 10 })], null)).toEqual({ rx: null, tx: null });
+    expect(latestAirtimePct([point(0, { airtimeRxSecs: 10 })], null)).toEqual({ rx: null, tx: null });
   });
 });