diff --git a/vault_oidc_ssh_cert_action.py b/vault_oidc_ssh_cert_action.py
index 5a51edc..ddfd423 100644
--- a/vault_oidc_ssh_cert_action.py
+++ b/vault_oidc_ssh_cert_action.py
@@ -6,6 +6,10 @@
 import requests
 
 
+class VoscaError(Exception):
+    pass
+
+
 def _determine_audience(input_audience: str, vault_server: str) -> str:
     if input_audience:
         return input_audience
@@ -69,7 +73,7 @@ def github_vault_auth() -> None:
         )
     except requests.exceptions.HTTPError as http_error:
         print(http_error.response.json())
-        raise SystemExit(1) from http_error
+        raise VoscaError from http_error
 
     print(f"::add-mask::{vault_token}")
     with open(os.environ["GITHUB_OUTPUT"], mode="a", encoding="utf-8") as ghof: