diff --git a/gptscript/opts.py b/gptscript/opts.py
index 71b7831..932af4c 100644
--- a/gptscript/opts.py
+++ b/gptscript/opts.py
@@ -30,7 +30,7 @@ def __init__(self,
                  chatState: str = "",
                  confirm: bool = False,
                  prompt: bool = False,
-                 credentialOverride: str = "",
+                 credentialOverrides: list[str] = None,
                  env: list[str] = None,
                  apiKey: str = "",
                  baseURL: str = "",
@@ -44,5 +44,5 @@ def __init__(self,
         self.chatState = chatState
         self.confirm = confirm
         self.prompt = prompt
-        self.credentialOverride = credentialOverride
+        self.credentialOverrides = credentialOverrides
         self.env = env
diff --git a/tests/test_gptscript.py b/tests/test_gptscript.py
index 1469d49..c12f719 100644
--- a/tests/test_gptscript.py
+++ b/tests/test_gptscript.py
@@ -186,10 +186,10 @@ async def collect_events(run: Run, e: CallFrame | RunFrame | PromptFrame):
 @pytest.mark.asyncio
 async def test_credential_override(gptscript):
     run = gptscript.run(
-        "./tests/fixtures/credential-override.gpt", 
+        os.getcwd() + "/tests/fixtures/credential-override.gpt",
         Options(
             disableCache=True,
-            credentialOverride='test.ts.credential_override:TEST_CRED=foo'
+            credentialOverrides=['test.ts.credential_override:TEST_CRED=foo']
         ),
     )
     assert "foo" in await run.text(), "Expect credential override to have correct output"