diff --git a/src/lib/components/buttonv2/CopyButton.component.test.tsx b/src/lib/components/buttonv2/CopyButton.component.test.tsx
new file mode 100644
index 0000000000..c53fbbf1d4
--- /dev/null
+++ b/src/lib/components/buttonv2/CopyButton.component.test.tsx
@@ -0,0 +1,252 @@
+import "@testing-library/jest-dom";
+import { act, render, screen, waitFor } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import React from "react";
+import { getWrapper } from "../../testUtils";
+import { CopyButton } from "./CopyButton.component";
+
+describe("CopyButton", () => {
+	const { Wrapper } = getWrapper();
+	const originalClipboard = navigator.clipboard;
+
+	beforeEach(() => {
+		Object.assign(navigator, {
+			clipboard: {
+				writeText: jest.fn(),
+				write: jest.fn(),
+			},
+		});
+		// JSDOM doesn't define ClipboardItem; needed for copyAsHtml path. Stub only — full interface not needed for tests.
+		if (typeof globalThis.ClipboardItem === "undefined") {
+			// @ts-expect-error — intentional stub for JSDOM; global ClipboardItem type expects full interface (getType, types, etc.)
+			globalThis.ClipboardItem = class {};
+		}
+	});
+
+	afterEach(() => {
+		Object.assign(navigator, { clipboard: originalClipboard });
+		jest.restoreAllMocks();
+	});
+
+	it("when writeText returns a rejected Promise, should enter the unsupported state", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockRejectedValueOnce(new Error("Clipboard denied"));
+
+		render(<CopyButton textToCopy="test" />, { wrapper: Wrapper });
+
+		const button = screen.getByRole("button", { name: "Copy" });
+		await act(() => userEvent.click(button));
+
+		await waitFor(() => {
+			expect(writeTextMock).toHaveBeenCalledWith("test");
+		});
+
+		// Unsupported state: button should not show success, and not be aria-disabled
+		expect(
+			screen.queryByRole("button", { name: "Copied !" }),
+		).not.toBeInTheDocument();
+		const buttonAfterReject = screen.getByRole("button", { name: "Copy" });
+		expect(buttonAfterReject).not.toHaveAttribute("aria-disabled", "true");
+	});
+
+	it("during success state click does nothing; after 2s resets to idle and click works again", async () => {
+		jest.useFakeTimers();
+		try {
+			const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+			writeTextMock.mockResolvedValue(undefined);
+
+			render(<CopyButton textToCopy="test" />, { wrapper: Wrapper });
+
+			await act(() =>
+				userEvent.click(screen.getByRole("button", { name: "Copy" })),
+			);
+
+			await waitFor(() => {
+				expect(
+					screen.getByRole("button", { name: "Copied !" }),
+				).toBeInTheDocument();
+			});
+
+			expect(writeTextMock).toHaveBeenCalledTimes(1);
+			const inSuccess = screen.getByRole("button", { name: "Copied !" });
+			expect(inSuccess).toHaveAttribute("aria-disabled", "true");
+
+			await act(() => userEvent.click(inSuccess));
+			expect(writeTextMock).toHaveBeenCalledTimes(1);
+
+			act(() => {
+				jest.advanceTimersByTime(2000);
+			});
+
+			await waitFor(() => {
+				expect(
+					screen.getByRole("button", { name: "Copy" }),
+				).toBeInTheDocument();
+				expect(
+					screen.getByRole("button", { name: "Copy" }),
+				).not.toHaveAttribute("aria-disabled", "true");
+			});
+
+			await act(() =>
+				userEvent.click(screen.getByRole("button", { name: "Copy" })),
+			);
+
+			await waitFor(() => {
+				expect(writeTextMock).toHaveBeenCalledTimes(2);
+			});
+		} finally {
+			jest.useRealTimers();
+		}
+	});
+
+	it("standard copy (writeText): on success shows Copied ! tooltip and aria-disabled", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton textToCopy="hello" />, { wrapper: Wrapper });
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy" })),
+		);
+
+		await waitFor(() => {
+			expect(writeTextMock).toHaveBeenCalledWith("hello");
+			const button = screen.getByRole("button", { name: "Copied !" });
+			expect(button).toHaveAttribute("aria-disabled", "true");
+		});
+	});
+
+	it("copyAsHtml: calls clipboard.write and on success shows Copied ! and aria-disabled", async () => {
+		const writeMock = navigator.clipboard.write as jest.Mock;
+		writeMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton textToCopy="<b>hi</b>" copyAsHtml />, {
+			wrapper: Wrapper,
+		});
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy" })),
+		);
+
+		await waitFor(() => {
+			expect(writeMock).toHaveBeenCalledTimes(1);
+			expect(writeMock.mock.calls[0][0]).toHaveLength(1);
+			expect(
+				screen.getByRole("button", { name: "Copied !" }),
+			).toBeInTheDocument();
+			expect(screen.getByRole("button", { name: "Copied !" })).toHaveAttribute(
+				"aria-disabled",
+				"true",
+			);
+		});
+	});
+
+	it("copyAsHtml: when write rejects, enters unsupported state", async () => {
+		const writeMock = navigator.clipboard.write as jest.Mock;
+		writeMock.mockRejectedValueOnce(new Error("Denied"));
+
+		render(<CopyButton textToCopy="<b>hi</b>" copyAsHtml />, {
+			wrapper: Wrapper,
+		});
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy" })),
+		);
+
+		await waitFor(() => {
+			expect(writeMock).toHaveBeenCalled();
+		});
+
+		expect(
+			screen.queryByRole("button", { name: "Copied !" }),
+		).not.toBeInTheDocument();
+		expect(screen.getByRole("button", { name: "Copy" })).not.toHaveAttribute(
+			"aria-disabled",
+			"true",
+		);
+	});
+
+	it("ghost variant without label: tooltip is Copy then Copied ! on success", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton textToCopy="x" />, { wrapper: Wrapper });
+
+		expect(screen.getByRole("button", { name: "Copy" })).toBeInTheDocument();
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy" })),
+		);
+
+		await waitFor(() => {
+			expect(
+				screen.getByRole("button", { name: "Copied !" }),
+			).toBeInTheDocument();
+		});
+	});
+
+	it("ghost variant with label: tooltip is Copy {label} then Copied ! on success", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton textToCopy="x" label="key" />, { wrapper: Wrapper });
+
+		expect(
+			screen.getByRole("button", { name: "Copy key" }),
+		).toBeInTheDocument();
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy key" })),
+		);
+
+		await waitFor(() => {
+			expect(
+				screen.getByRole("button", { name: "Copied !" }),
+			).toBeInTheDocument();
+		});
+	});
+
+	it("outline variant without label: tooltip is Copy then Copied! on success", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton textToCopy="x" variant="outline" />, {
+			wrapper: Wrapper,
+		});
+
+		expect(screen.getByRole("button", { name: "Copy" })).toBeInTheDocument();
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy" })),
+		);
+
+		await waitFor(() => {
+			expect(
+				screen.getByRole("button", { name: "Copied!" }),
+			).toBeInTheDocument();
+		});
+	});
+
+	it("outline variant with label: tooltip is Copy {label} then Copied {label}! on success", async () => {
+		const writeTextMock = navigator.clipboard.writeText as jest.Mock;
+		writeTextMock.mockResolvedValueOnce(undefined);
+
+		render(<CopyButton variant="outline" textToCopy="x" label="key" />, {
+			wrapper: Wrapper,
+		});
+
+		expect(
+			screen.getByRole("button", { name: "Copy key" }),
+		).toBeInTheDocument();
+
+		await act(() =>
+			userEvent.click(screen.getByRole("button", { name: "Copy key" })),
+		);
+
+		await waitFor(() => {
+			expect(
+				screen.getByRole("button", { name: "Copied key!" }),
+			).toBeInTheDocument();
+		});
+	});
+});
diff --git a/src/lib/components/buttonv2/CopyButton.component.tsx b/src/lib/components/buttonv2/CopyButton.component.tsx
index 3f3074929a..787f197ca4 100644
--- a/src/lib/components/buttonv2/CopyButton.component.tsx
+++ b/src/lib/components/buttonv2/CopyButton.component.tsx
@@ -1,6 +1,6 @@
 import { useEffect, useState } from 'react';
 import { Icon } from '../icon/Icon.component';
-import { Button, Props } from './Buttonv2.component';
+import { Button, type Props } from './Buttonv2.component';
 
 export const COPY_STATE_IDLE = 'idle';
 export const COPY_STATE_SUCCESS = 'success';
@@ -8,6 +8,7 @@ export const COPY_STATE_UNSUPPORTED = 'unsupported';
 export const useClipboard = () => {
   const [copyStatus, setCopyStatus] = useState(COPY_STATE_IDLE);
   useEffect(() => {
+    if (copyStatus === COPY_STATE_IDLE) return;
     const timer = setTimeout(() => {
       setCopyStatus(COPY_STATE_IDLE);
     }, 2000);
@@ -41,8 +42,14 @@ export const useClipboard = () => {
         });
     } else {
       // Copy as plain text only
-      navigator.clipboard.writeText(text);
-      setCopyStatus(COPY_STATE_SUCCESS);
+      navigator.clipboard
+        .writeText(text)
+        .then(() => {
+          setCopyStatus(COPY_STATE_SUCCESS);
+        })
+        .catch(() => {
+          setCopyStatus(COPY_STATE_UNSUPPORTED);
+        });
     }
   };
 
@@ -65,45 +72,45 @@ export const CopyButton = ({
   variant?: 'outline' | 'ghost';
 } & Omit<Props, 'tooltip' | 'label'>) => {
   const { copy, copyStatus } = useClipboard();
+  const isSuccess = copyStatus === COPY_STATE_SUCCESS;
   return (
     <Button
       {...props}
       variant={variant === 'outline' ? 'outline' : undefined}
       style={{
+        ...props.style,
+        ...(isSuccess && { cursor: 'not-allowed', opacity: 0.5 }),
         minWidth:
-          //Just to make sure the width of the button stays the same when copied!
           variant === 'outline'
-            ? (label ? label.length / 2 : 0) + 7 + 'rem'
+            ? `${(label ? label.length / 2 : 0) + 7}rem`
             : undefined,
       }}
       label={
         variant === 'outline'
-          ? copyStatus === COPY_STATE_SUCCESS
-            ? `Copied${label ? ' ' + label + '' : ''}!`
-            : `Copy${label ? ' ' + label : ''}`
+          ? isSuccess
+            ? `Copied${label ? ` ${label}` : ''}!`
+            : `Copy${label ? ` ${label}` : ''}`
           : undefined
       }
       icon={
         <Icon
-          name={copyStatus === COPY_STATE_SUCCESS ? 'Check' : 'Copy'}
-          color={
-            copyStatus === COPY_STATE_SUCCESS ? 'statusHealthy' : undefined
-          }
+          name={isSuccess ? 'Check' : 'Copy'}
+          color={isSuccess ? 'statusHealthy' : undefined}
         />
       }
-      disabled={copyStatus === COPY_STATE_SUCCESS || props.disabled}
-      onClick={() => copy(textToCopy, copyAsHtml)}
+      disabled={props.disabled}
+      aria-disabled={isSuccess || props.disabled}
+      onClick={() => {
+        if (!isSuccess) copy(textToCopy, copyAsHtml);
+      }}
       type="button"
       tooltip={
         variant !== 'outline'
           ? {
-              overlay:
-                copyStatus === COPY_STATE_SUCCESS
-                  ? 'Copied !'
-                  : `Copy${label ? ' ' + label : ''}`,
-              overlayStyle: {
-                maxWidth: '20rem',
-              },
+              overlay: isSuccess
+                ? 'Copied !'
+                : `Copy${label ? ` ${label}` : ''}`,
+              overlayStyle: { maxWidth: '20rem' },
               placement: 'top',
             }
           : undefined