diff --git a/web_favicon/tests/test_web_favicon.py b/web_favicon/tests/test_web_favicon.py
index b6ea4d631..387c53bbd 100644
--- a/web_favicon/tests/test_web_favicon.py
+++ b/web_favicon/tests/test_web_favicon.py
@@ -72,3 +72,29 @@ class TestWebFavicon(TransactionCase):
                 expected_favicon_url,
                 "The favicon URL should match the expected value.",
             )
+
+    def test_04_favicon_multiple_companies(self):
+        """Test _get_favicon with multiple companies in cids cookie."""
+        Company = self.env["res.company"]
+
+        company_1 = Company.create(
+            {"name": "Company 1", "favicon": Company._get_default_favicon()}
+        )
+        company_2 = Company.create(
+            {"name": "Company 2", "favicon": Company._get_default_favicon()}
+        )
+
+        with MockRequest(self.env) as mock_request:
+            mock_request.httprequest.cookies = {
+                "cids": f"{company_1.id}-{company_2.id}"
+            }
+            favicon_url = Company._get_favicon()
+
+        self.assertTrue(
+            favicon_url, "Favicon URL should be generated for multiple companies."
+        )
+        self.assertIn(
+            str(company_1.id),
+            favicon_url,
+            "Favicon URL should correspond to the first company in the cids cookie.",
+        )