diff --git a/ui/litellm-dashboard/src/app/(dashboard)/models-and-endpoints/components/ModelRetrySettingsTab.test.tsx b/ui/litellm-dashboard/src/app/(dashboard)/models-and-endpoints/components/ModelRetrySettingsTab.test.tsx
index 5b756a833d..6f89a41034 100644
--- a/ui/litellm-dashboard/src/app/(dashboard)/models-and-endpoints/components/ModelRetrySettingsTab.test.tsx
+++ b/ui/litellm-dashboard/src/app/(dashboard)/models-and-endpoints/components/ModelRetrySettingsTab.test.tsx
@@ -8,9 +8,17 @@ import ModelRetrySettingsTab from "./ModelRetrySettingsTab";
 // directly so the component can be tested in isolation.
 vi.mock("@tremor/react", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@tremor/react")>();
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts. A file-level
+  // vi.mock fully replaces the setup-level mock, so without this the real Tremor Button
+  // leaks through and its useTooltip(300) schedules a native setTimeout that can fire
+  // post-teardown -> "window is not defined".
   return {
     ...actual,
     TabPanel: ({ children }: { children: React.ReactNode }) => React.createElement("div", null, children),
+    Button: React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) =>
+      React.createElement("button", { ...props, ref }, children),
+    ),
+    Tooltip: ({ children }: { children?: React.ReactNode }) => React.createElement(React.Fragment, null, children),
     // Keep Select/SelectItem as the real implementation so scope-switching is testable
   };
 });
diff --git a/ui/litellm-dashboard/src/app/(dashboard)/teams/components/TeamsTable/ModelsCell.test.tsx b/ui/litellm-dashboard/src/app/(dashboard)/teams/components/TeamsTable/ModelsCell.test.tsx
index 2b487d6532..1d466a7a18 100644
--- a/ui/litellm-dashboard/src/app/(dashboard)/teams/components/TeamsTable/ModelsCell.test.tsx
+++ b/ui/litellm-dashboard/src/app/(dashboard)/teams/components/TeamsTable/ModelsCell.test.tsx
@@ -9,10 +9,18 @@ import ModelsCell from "./ModelsCell";
 // interaction can be tested end-to-end.
 vi.mock("@tremor/react", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@tremor/react")>();
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts. A file-level
+  // vi.mock fully replaces the setup-level mock, so without this the real Tremor Button
+  // leaks through and its useTooltip(300) schedules a native setTimeout that can fire
+  // post-teardown -> "window is not defined".
   return {
     ...actual,
     Icon: ({ onClick, "aria-label": ariaLabel }: { onClick?: () => void; "aria-label"?: string }) =>
       React.createElement("button", { onClick, "aria-label": ariaLabel ?? "accordion-toggle", type: "button" }),
+    Button: React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) =>
+      React.createElement("button", { ...props, ref }, children),
+    ),
+    Tooltip: ({ children }: { children?: React.ReactNode }) => React.createElement(React.Fragment, null, children),
   };
 });
 
diff --git a/ui/litellm-dashboard/src/components/AIHub/forms/MakeMCPPublicForm.test.tsx b/ui/litellm-dashboard/src/components/AIHub/forms/MakeMCPPublicForm.test.tsx
index b0228e9e86..08dc64767f 100644
--- a/ui/litellm-dashboard/src/components/AIHub/forms/MakeMCPPublicForm.test.tsx
+++ b/ui/litellm-dashboard/src/components/AIHub/forms/MakeMCPPublicForm.test.tsx
@@ -63,9 +63,15 @@ vi.mock("antd", () => ({
   ),
 }));
 
-// Additional @tremor/react mocks (Button is already mocked globally)
+// Additional @tremor/react mocks.
+// NOTE: the comment used to say "Button is already mocked globally" — that was
+// incorrect. A file-level vi.mock fully replaces the setup-level mock from
+// tests/setupTests.ts, so we must re-apply the Button/Tooltip overrides here.
+// Without them, the real Tremor Button leaks through and its useTooltip(300)
+// schedules a native setTimeout that can fire post-teardown -> "window is not defined".
 vi.mock("@tremor/react", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@tremor/react")>();
+  const React = await import("react");
   return {
     ...actual,
     Text: ({ children, className }: any) => <span className={className}>{children}</span>,
@@ -75,6 +81,12 @@ vi.mock("@tremor/react", async (importOriginal) => {
         {children}
       </span>
     ),
+    Button: React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) => (
+      <button {...props} ref={ref}>
+        {children}
+      </button>
+    )),
+    Tooltip: ({ children }: any) => <>{children}</>,
   };
 });
 
diff --git a/ui/litellm-dashboard/src/components/GuardrailsMonitor/ScoreChart.test.tsx b/ui/litellm-dashboard/src/components/GuardrailsMonitor/ScoreChart.test.tsx
index 848807ce5a..934d4ea394 100644
--- a/ui/litellm-dashboard/src/components/GuardrailsMonitor/ScoreChart.test.tsx
+++ b/ui/litellm-dashboard/src/components/GuardrailsMonitor/ScoreChart.test.tsx
@@ -6,6 +6,10 @@ import { ScoreChart } from "./ScoreChart";
 
 vi.mock("@tremor/react", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@tremor/react")>();
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts. A file-level
+  // vi.mock fully replaces the setup-level mock, so without this the real Tremor Button
+  // leaks through and its useTooltip(300) schedules a native setTimeout that can fire
+  // post-teardown -> "window is not defined".
   return {
     ...actual,
     BarChart: ({ data, categories }: { data: any[]; categories: string[] }) => (
@@ -17,6 +21,12 @@ vi.mock("@tremor/react", async (importOriginal) => {
         ))}
       </div>
     ),
+    Button: React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) => (
+      <button {...props} ref={ref}>
+        {children}
+      </button>
+    )),
+    Tooltip: ({ children }: { children?: React.ReactNode }) => <>{children}</>,
   };
 });
 
diff --git a/ui/litellm-dashboard/src/components/molecules/models/columns.test.tsx b/ui/litellm-dashboard/src/components/molecules/models/columns.test.tsx
index b20c85ecb3..a3dbbb2783 100644
--- a/ui/litellm-dashboard/src/components/molecules/models/columns.test.tsx
+++ b/ui/litellm-dashboard/src/components/molecules/models/columns.test.tsx
@@ -23,9 +23,19 @@ vi.mock("@tremor/react", async (importOriginal) => {
     );
   });
   IconComponent.displayName = "Icon";
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts. A file-level
+  // vi.mock fully replaces the setup-level mock, so without this the real Tremor Button
+  // leaks through and its useTooltip(300) schedules a native setTimeout that can fire
+  // post-teardown -> "window is not defined".
+  const Button = React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) =>
+    React.createElement("button", { ...props, ref }, children),
+  );
+  const Tooltip = ({ children }: any) => React.createElement(React.Fragment, null, children);
   return {
     ...actual,
     Icon: IconComponent,
+    Button,
+    Tooltip,
   };
 });
 
diff --git a/ui/litellm-dashboard/src/components/policies/impact_popover.test.tsx b/ui/litellm-dashboard/src/components/policies/impact_popover.test.tsx
index b875892779..bcc67888f9 100644
--- a/ui/litellm-dashboard/src/components/policies/impact_popover.test.tsx
+++ b/ui/litellm-dashboard/src/components/policies/impact_popover.test.tsx
@@ -15,10 +15,18 @@ vi.mock("@heroicons/react/outline", () => ({
 
 vi.mock("@tremor/react", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@tremor/react")>();
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts. A file-level
+  // vi.mock fully replaces the setup-level mock, so without this the real Tremor Button
+  // leaks through and its useTooltip(300) schedules a native setTimeout that can fire
+  // post-teardown -> "window is not defined".
   return {
     ...actual,
     Icon: ({ icon: IconComp, onClick, className }: any) =>
       React.createElement("button", { type: "button", onClick, className }, IconComp?.displayName ?? IconComp?.name ?? "icon"),
+    Button: React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) =>
+      React.createElement("button", { ...props, ref }, children),
+    ),
+    Tooltip: ({ children }: { children?: React.ReactNode }) => React.createElement(React.Fragment, null, children),
   };
 });
 
diff --git a/ui/litellm-dashboard/src/components/user_edit_view.test.tsx b/ui/litellm-dashboard/src/components/user_edit_view.test.tsx
index 7aeaae94fa..69ef8dd95e 100644
--- a/ui/litellm-dashboard/src/components/user_edit_view.test.tsx
+++ b/ui/litellm-dashboard/src/components/user_edit_view.test.tsx
@@ -85,9 +85,19 @@ vi.mock("@tremor/react", async (importOriginal) => {
     return React.createElement("option", { value, title }, childText || title || value);
   };
   SelectItem.displayName = "SelectItem";
+  // Re-apply the global Button/Tooltip overrides from tests/setupTests.ts.
+  // A file-level vi.mock fully replaces the setup-level mock, so without this
+  // the real Tremor Button leaks through and its useTooltip(300) schedules a
+  // native setTimeout that fires post-teardown -> "window is not defined".
+  const Button = React.forwardRef<HTMLButtonElement, any>(({ children, ...props }, ref) =>
+    React.createElement("button", { ...props, ref }, children),
+  );
+  const TremorTooltip = ({ children }: any) => React.createElement(React.Fragment, null, children);
   return {
     ...actual,
     SelectItem,
+    Button,
+    Tooltip: TremorTooltip,
   };
 });
 
@@ -141,11 +151,6 @@ describe("UserEditView", () => {
   });
 
   afterEach(() => {
-    // Tremor's internal Tooltip sets a setTimeout that fires after teardown,
-    // causing "window is not defined". Flush pending timers before cleanup.
-    vi.useFakeTimers();
-    vi.runAllTimers();
-    vi.useRealTimers();
     cleanup();
   });