diff --git a/status_cake_exporter/_status_cake.py b/status_cake_exporter/_status_cake.py
index 593bf79..d943d08 100644
--- a/status_cake_exporter/_status_cake.py
+++ b/status_cake_exporter/_status_cake.py
@@ -182,7 +182,10 @@ def list_tests(self, tags: str = "") -> list[dict]:
             # Fetch the performance of each test and add it to the response
             for test in response:
                 history = self.get_test_history(test["id"])
-                test["performance"] = history["data"][0]["performance"]
+                if history["data"]:
+                    test["performance"] = history["data"][0]["performance"]
+                else:
+                    logger.warning(f"No performance data found for test ID {test['id']}")
 
             print(response)
             return response