diff --git a/tests/TooltipDefinition.test.svelte b/tests/TooltipDefinition.test.svelte
deleted file mode 100644
index a4c41069..00000000
--- a/tests/TooltipDefinition.test.svelte
+++ /dev/null
@@ -1,29 +0,0 @@
-<script lang="ts">
-  import { TooltipDefinition } from "carbon-components-svelte";
-
-  let open = false;
-</script>
-
-<TooltipDefinition
-  bind:open
-  on:open
-  on:close
-  tooltipText="IBM Corporate Headquarters is based in Armonk, New York."
->
-  Armonk
-</TooltipDefinition>
-
-<TooltipDefinition
-  direction="top"
-  align="start"
-  tooltipText="IBM Corporate Headquarters is based in Armonk, New York."
->
-  Armonk
-</TooltipDefinition>
-
-<TooltipDefinition>
-  Armonk
-  <span slot="tooltip" style="color: red">
-    IBM Corporate Headquarters is based in Armonk, New York.
-  </span>
-</TooltipDefinition>
diff --git a/tests/TooltipDefinition/TooltipDefinition.test.svelte b/tests/TooltipDefinition/TooltipDefinition.test.svelte
new file mode 100644
index 00000000..ce308884
--- /dev/null
+++ b/tests/TooltipDefinition/TooltipDefinition.test.svelte
@@ -0,0 +1,26 @@
+<script lang="ts">
+  import { TooltipDefinition } from "carbon-components-svelte";
+
+  export let tooltipText = "Test tooltip text";
+  export let open = false;
+  export let align: "start" | "center" | "end" = "center";
+  export let direction: "top" | "bottom" = "bottom";
+  export let id = "test-tooltip";
+  export let triggerContent = "Tooltip trigger";
+</script>
+
+<TooltipDefinition
+  {tooltipText}
+  {open}
+  {align}
+  {direction}
+  {id}
+  on:open={() => {
+    console.log("open");
+  }}
+  on:close={() => {
+    console.log("close");
+  }}
+>
+  {triggerContent}
+</TooltipDefinition>
diff --git a/tests/TooltipDefinition/TooltipDefinition.test.ts b/tests/TooltipDefinition/TooltipDefinition.test.ts
new file mode 100644
index 00000000..0250f0cd
--- /dev/null
+++ b/tests/TooltipDefinition/TooltipDefinition.test.ts
@@ -0,0 +1,158 @@
+import { render, screen } from "@testing-library/svelte";
+import { user } from "../setup-tests";
+import TooltipDefinition from "./TooltipDefinition.test.svelte";
+
+describe("TooltipDefinition", () => {
+  let consoleLog: ReturnType<typeof vi.spyOn>;
+
+  beforeEach(() => {
+    consoleLog = vi.spyOn(console, "log");
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("should render with default props", () => {
+    render(TooltipDefinition);
+
+    expect(screen.getByText("Tooltip trigger")).toBeInTheDocument();
+    expect(screen.getByText("Test tooltip text")).toBeInTheDocument();
+  });
+
+  it("should show tooltip on hover", async () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    await user.hover(trigger);
+
+    expect(trigger).toHaveClass("bx--tooltip--visible");
+    expect(consoleLog).toHaveBeenCalledWith("open");
+  });
+
+  it("should hide tooltip on mouse leave", async () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    await user.hover(trigger);
+    await user.unhover(trigger);
+
+    expect(trigger).toHaveClass("bx--tooltip--hidden");
+    expect(consoleLog).toHaveBeenCalledWith("close");
+  });
+
+  it("should show tooltip on focus", async () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    await user.tab();
+
+    expect(trigger).toHaveClass("bx--tooltip--visible");
+    expect(consoleLog).toHaveBeenCalledWith("open");
+  });
+
+  it("should hide tooltip on blur", async () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    await user.tab();
+    await user.tab();
+
+    expect(trigger).toHaveClass("bx--tooltip--hidden");
+    expect(consoleLog).toHaveBeenCalledWith("close");
+  });
+
+  it("should hide tooltip on Escape key", async () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    await user.hover(trigger);
+    await user.keyboard("{Escape}");
+
+    expect(trigger).toHaveClass("bx--tooltip--hidden");
+    expect(consoleLog).toHaveBeenCalledWith("close");
+  });
+
+  it("should support top direction", () => {
+    render(TooltipDefinition, {
+      props: { direction: "top" },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--top");
+  });
+
+  it("should support bottom direction", () => {
+    render(TooltipDefinition, {
+      props: { direction: "bottom" },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--bottom");
+  });
+
+  it("should support start alignment", () => {
+    render(TooltipDefinition, {
+      props: { align: "start" },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--align-start");
+  });
+
+  it("should support center alignment", () => {
+    render(TooltipDefinition, {
+      props: { align: "center" },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--align-center");
+  });
+
+  it("should support end alignment", () => {
+    render(TooltipDefinition, {
+      props: { align: "end" },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--align-end");
+  });
+
+  it("should support custom trigger content", () => {
+    render(TooltipDefinition, {
+      props: {
+        triggerContent: "Custom trigger",
+      },
+    });
+
+    expect(screen.getByText("Custom trigger")).toBeInTheDocument();
+  });
+
+  it("should support controlled open state", () => {
+    render(TooltipDefinition, {
+      props: { open: true },
+    });
+
+    const trigger = screen.getByText("Tooltip trigger");
+    expect(trigger).toHaveClass("bx--tooltip--visible");
+  });
+
+  it("should use provided id for tooltip", () => {
+    render(TooltipDefinition, {
+      props: { id: "custom-id" },
+    });
+
+    const tooltip = screen.getByRole("tooltip");
+    expect(tooltip).toHaveAttribute("id", "custom-id");
+  });
+
+  it("should have correct ARIA attributes", () => {
+    render(TooltipDefinition);
+
+    const trigger = screen.getByText("Tooltip trigger");
+    const tooltip = screen.getByRole("tooltip");
+
+    expect(trigger).toHaveAttribute("aria-describedby", tooltip.id);
+    expect(tooltip).toHaveClass("bx--assistive-text");
+  });
+});