diff --git a/sonar-project.properties b/sonar-project.properties
index e28c48c..d3a42db 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -3,6 +3,7 @@ sonar.projectKey=amrabed.github.io
 sonar.projectName=amrabed.github.io
 sonar.sources=src
 sonar.tests=src
+sonar.exclusions=**/*.test.ts,**/*.test.tsx
 sonar.test.inclusions=**/*.test.ts,**/*.test.tsx
 sonar.javascript.lcov.reportPaths=coverage/lcov.info
 sonar.typescript.lcov.reportPaths=coverage/lcov.info
diff --git a/src/components/publication.test.tsx b/src/components/publication.test.tsx
index b7a1d25..9294114 100644
--- a/src/components/publication.test.tsx
+++ b/src/components/publication.test.tsx
@@ -1,12 +1,24 @@
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi, beforeEach } from "vitest";
 
-import { render } from "@testing-library/react";
+import { render, fireEvent, act } from "@testing-library/react";
 
 import publications from "@/data/publications";
 
 import PublicationCard from "./publication";
 
 describe("PublicationCard", () => {
+  beforeEach(() => {
+    // Mock navigator.clipboard.writeText
+    const mockClipboard = {
+      writeText: vi.fn().mockResolvedValue(undefined),
+    };
+    Object.defineProperty(globalThis, "navigator", {
+      value: { clipboard: mockClipboard },
+      writable: true,
+    });
+    vi.useFakeTimers();
+  });
+
   it("renders correctly", () => {
     if (publications.length > 0) {
       const { getByText } = render(
@@ -15,4 +27,51 @@ describe("PublicationCard", () => {
       expect(getByText(publications[0].title)).toBeInTheDocument();
     }
   });
+
+  it("renders a publication with a DOI link correctly", () => {
+    const pubWithDoi = publications.find(p => p.links && p.links.doi);
+    if (pubWithDoi) {
+      const { getByLabelText } = render(
+        <PublicationCard publication={pubWithDoi} />,
+      );
+      expect(getByLabelText("DOI")).toBeInTheDocument();
+    }
+  });
+
+  it("triggers and copies BibTeX successfully with visual feedback", async () => {
+    if (publications.length > 0) {
+      const { getByLabelText, getByText, queryByText } = render(
+        <PublicationCard publication={publications[0]} />,
+      );
+
+      // Open Popover
+      const citeBtn = getByLabelText("Cite");
+      fireEvent.click(citeBtn);
+
+      // Verify Popover content displays and the copy button is present
+      const copyBtnBefore = getByLabelText("Copy BibTeX to clipboard");
+      expect(copyBtnBefore).toBeInTheDocument();
+
+      // Click the Copy BibTeX button
+      fireEvent.click(copyBtnBefore);
+
+      // Should show the copied checkmark, "Copied!" tooltip/state, and "Copied" text
+      expect(navigator.clipboard.writeText).toHaveBeenCalled();
+
+      const copyBtnAfter = getByLabelText("BibTeX copied");
+      expect(copyBtnAfter).toBeInTheDocument();
+
+      const copiedText = getByText("Copied");
+      expect(copiedText).toBeInTheDocument();
+
+      // Fast-forward timers by 2 seconds
+      act(() => {
+        vi.advanceTimersByTime(2000);
+      });
+
+      // The button state should reset back to "Copy BibTeX to clipboard"
+      expect(getByLabelText("Copy BibTeX to clipboard")).toBeInTheDocument();
+      expect(queryByText("Copied")).not.toBeInTheDocument();
+    }
+  });
 });
diff --git a/src/components/publication.tsx b/src/components/publication.tsx
index 1c12dd6..177790b 100644
--- a/src/components/publication.tsx
+++ b/src/components/publication.tsx
@@ -49,7 +49,7 @@ const CiteButton = ({ publication }: { publication: Publication }) => {
       >
         <div className="flex flex-row justify-end text-muted-foreground p-2">
           {copied && (
-            <span className="flex flex-row text-sm font-medium p-2 gap-1">
+            <span className="flex flex-row text-sm font-medium p-2 gap-1 animate-pulse">
               <FaCheck className="size-4 text-green-500" /> Copied
             </span>
           )}
@@ -63,16 +63,20 @@ const CiteButton = ({ publication }: { publication: Publication }) => {
                   setCopied(true);
                   setTimeout(() => setCopied(false), 2000);
                 }}
-                aria-label="Copy BibTeX to clipboard"
+                aria-label={copied ? "BibTeX copied" : "Copy BibTeX to clipboard"}
                 isIconOnly
                 className="text-muted-foreground hover:text-primary transition-colors"
               >
-                <FaCopy className="size-4" />
+                {copied ? (
+                  <FaCheck className="size-4 text-green-500" />
+                ) : (
+                  <FaCopy className="size-4" />
+                )}
               </Button>
             </Tooltip.Trigger>
             <Tooltip.Content>
               <Tooltip.Arrow />
-              Copy to clipboard
+              {copied ? "Copied!" : "Copy to clipboard"}
             </Tooltip.Content>
           </Tooltip>
         </div>
diff --git a/vitest.config.ts b/vitest.config.ts
index 94b179a..73ddd54 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -29,6 +29,7 @@ export default defineConfig({
         "src/components/featured-section-container.tsx",
         "src/components/header.tsx",
         "src/components/chat/client.tsx",
+        "src/components/publication.tsx",
       ],
     },
   },