diff --git a/executor/tests/test_credential.py b/executor/tests/test_credential.py
index d030f842..5ce111b2 100644
--- a/executor/tests/test_credential.py
+++ b/executor/tests/test_credential.py
@@ -26,9 +26,7 @@ def test_replace_credential(self):
         v = replace_credential({
             "c": f'${{{{OO_CREDENTIAL:{ORIGIN_VALUE}}}}}'
         }, {
-            "c": InputHandleDef(handle="c", json_schema={
-                "contentMediaType": "oomol/credential"
-            }, value=None)
+            "c": InputHandleDef(**{"handle": "c", "json_schema": {"contentMediaType": "oomol/credential"}})
         })
         cred_input = v.get("c")
         self.assertIsInstance(cred_input, CredentialInput)
@@ -54,6 +52,14 @@ def test_credential_without_content_media(self):
 
         # 'a' should remain unchanged since no input_def for it
         self.assertEqual(cred_input_a, f'${{{{OO_CREDENTIAL:{ORIGIN_VALUE}}}}}')
+    
+    def test_credential_no_handle_def(self):
+        """Test credential replacement when no handle definition is provided"""
+        v = replace_credential({
+            "c": f'${{{{OO_CREDENTIAL:{ORIGIN_VALUE}}}}}'
+        }, None)
+        # Should remain unchanged because no input_def is provided
+        self.assertEqual(v.get("c"), f'${{{{OO_CREDENTIAL:{ORIGIN_VALUE}}}}}')
 
     def test_credential_in_other_string(self):
         """Test credential pattern inside other string (should not be replaced)"""
diff --git a/oocana/tests/test_handle.py b/oocana/tests/test_handle.py
index 790a817a..f3919dab 100644
--- a/oocana/tests/test_handle.py
+++ b/oocana/tests/test_handle.py
@@ -97,6 +97,7 @@ def input_handle_test(self, input_def: InputHandleDef, expected: InputHandleTest
         self.assertEqual(input_def.is_serializable_var(), expected["is_serializable_var"])
         self.assertEqual(input_def.value, expected["value"])
         self.assertEqual(input_def.has_value(), expected["has_value"])
+        self.assertEqual(input_def.is_credential_handle(), expected["is_credential_handle"] if "is_credential_handle" in expected else False)
 
     def output_handle_test(self, output_def: OutputHandleDef, expected: OutputHandleTestResult):
         self.handle_test(output_def, expected)