diff --git a/metropolis/pkg/supervisor/supervisor_testhelpers.go b/metropolis/pkg/supervisor/supervisor_testhelpers.go
index 1a72ad8..d3f994f 100644
--- a/metropolis/pkg/supervisor/supervisor_testhelpers.go
+++ b/metropolis/pkg/supervisor/supervisor_testhelpers.go
@@ -67,7 +67,7 @@
 			return err
 		}
 		return nil
-	}, WithExistingLogtree(lt))
+	}, WithExistingLogtree(lt), WithPropagatePanic)
 
 	t.Cleanup(func() {
 		ctxC()