diff --git a/dynvision/runtime/test_model.py b/dynvision/runtime/test_model.py
index b2cea20..600d211 100644
--- a/dynvision/runtime/test_model.py
+++ b/dynvision/runtime/test_model.py
@@ -290,6 +290,11 @@ def save_results(self, model: pl.LightningModule, precision: int = 16) -> None:
             del results_df
         except Exception as e:
             logger.error(f"Failed to save test results: {e}")
+            # Don't silently swallow the error - a partial/corrupt or missing
+            # test_outputs.csv must fail the job so Snakemake reruns it,
+            # instead of being picked up as valid input by downstream
+            # processing steps (mirrors the response-saving error handling below).
+            raise
 
         # Save model responses (tensors)
         try: