From 8a48c1d665e11357cadac0a9e824409cbaea0e6c Mon Sep 17 00:00:00 2001
From: Kolade Fajimi <107228310+koladefaj@users.noreply.github.com>
Date: Tue, 8 Sep 2026 09:04:10 +0100
Subject: [PATCH] test(vertex): exclude the unreachable exhaustiveness guard
 from coverage

---
 litellm/llms/vertex_ai/credentials_source.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litellm/llms/vertex_ai/credentials_source.py b/litellm/llms/vertex_ai/credentials_source.py
index dbeeb593afe..4cbec1c5f1c 100644
--- a/litellm/llms/vertex_ai/credentials_source.py
+++ b/litellm/llms/vertex_ai/credentials_source.py
@@ -143,4 +143,4 @@ def raise_vertex_credentials_failure(failure: VertexCredentialsFailure) -> NoRet
                 "Check for unescaped newlines in private_key."
             )
         case _:  # pragma: no cover - exhaustiveness guard, unreachable while the union holds
-            assert_never(failure)
+            assert_never(failure)  # pragma: no cover