diff --git a/src/js/src/lib/tracker.test.ts b/src/js/src/lib/tracker.test.ts
index 90d87af..969e624 100644
--- a/src/js/src/lib/tracker.test.ts
+++ b/src/js/src/lib/tracker.test.ts
@@ -178,4 +178,102 @@ describe("Tracker", () => {
       clearInterval((tracker as any).interval);
     });
   });
+
+  describe("tick()", () => {
+    test("Should call render()", () => {
+      const tracker = Tracker.create("A", false);
+      jest.spyOn(tracker, "render");
+      tracker.tick()();
+      expect(tracker.render).toHaveBeenCalled();
+    });
+  });
+
+  describe("stop()", () => {
+    test("Should clear the interval", () => {
+      const tracker = Tracker.create("A", false);
+      jest.spyOn(window, "clearInterval");
+      tracker.stop();
+      expect(window.clearInterval).toHaveBeenCalledWith(
+        (tracker as any).interval
+      );
+    });
+
+    test("Should set running to false", () => {
+      const tracker = Tracker.create("A", false);
+      tracker.stop();
+      expect(tracker.running).toBeFalsy();
+    });
+
+    test("Should add the elapsed time to workedToday", () => {
+      const tracker = Tracker.create("A", false);
+      (tracker as any).timeElapsed = 10;
+      tracker.workedToday = 5;
+      tracker.stop();
+      expect(tracker.workedToday).toBe(15);
+    });
+
+    test("Should call render()", () => {
+      const tracker = Tracker.create("A", false);
+      jest.spyOn(tracker, "render");
+      tracker.stop();
+      expect(tracker.render).toHaveBeenCalled();
+    });
+
+    test("Should dispatch a stop event", () => {
+      const tracker = Tracker.create("A", false);
+      const spy = jest.spyOn(tracker, "dispatchEvent");
+      tracker.stop();
+      expect(spy).toHaveBeenCalledWith(
+        expect.objectContaining({
+          type: TrackerEvent.stop,
+        })
+      );
+    });
+  });
+
+  describe("reset()", () => {
+    test("Should reset the startTime", () => {
+      const tracker = Tracker.create("A", false);
+      tracker.reset();
+      expect((tracker as any).startTime).toBeUndefined();
+    });
+  });
+
+  describe("update()", () => {
+    test("Should dispatch requestWorkedToday event", () => {
+      const tracker = Tracker.create("A", false);
+      const spy = jest.spyOn(tracker, "dispatchEvent");
+      tracker.update();
+      expect(spy).toHaveBeenCalledWith(
+        expect.objectContaining({
+          type: TrackerEvent.requestWorkedToday,
+        })
+      );
+    });
+  });
+
+  describe("getInlineSvg()", () => {
+    test("Should return the correct inline SVG", () => {
+      const key = "play";
+      const data = { workedToday: "0:00" };
+      const expectedSvg = `data:image/svg+xml;charset=utf8,play:{"workedToday":"0:00"}`;
+      const tracker = Tracker.create("ctx", false);
+      const result = tracker.getInlineSvg(key, data);
+      expect(result).toBe(expectedSvg);
+    });
+  });
+
+  describe("formatTime()", () => {
+    test("Should format time correctly when hours and minutes are single digits", () => {
+      const tracker = Tracker.create("A", false);
+      const formattedTime = tracker.formatTime(65);
+      expect(formattedTime).toBe("0:01");
+    });
+
+    test("Should format time correctly when hours and minutes are double digits", () => {
+      const tracker = Tracker.create("A", false);
+      const formattedTime = tracker.formatTime(3_600);
+      expect(formattedTime).toBe("1:00");
+    });
+  });
 });