Adding XAI_API_KEY to test_examples.py

Author: brightsparc

tests/test_examples.py

@@ -180,6 +180,7 @@ def print(self, *args: Any, **kwargs: Any) -> None:
     env.set('DEEPSEEK_API_KEY', 'testing')
     env.set('OVHCLOUD_API_KEY', 'testing')
     env.set('PYDANTIC_AI_GATEWAY_API_KEY', 'testing')
+    env.set('XAI_API_KEY', 'testing')
 
     prefix_settings = example.prefix_settings()
     opt_test = prefix_settings.get('test', '')