diff --git a/ego/src/egor.rs b/ego/src/egor.rs
index 21e5f3ed..6624b8cc 100644
--- a/ego/src/egor.rs
+++ b/ego/src/egor.rs
@@ -558,7 +558,8 @@ mod tests {
         let filepath = std::path::Path::new(&outdir).join(DOE_FILE);
         assert!(filepath.exists());
         let doe: Array2<f64> = read_npy(&filepath).expect("file read");
-        assert!(doe.nrows() > max_iters);
+        assert!(doe.nrows() <= init_doe.nrows() + max_iters);
+        assert!(doe.nrows() >= init_doe.nrows());
 
         println!("Rosenbrock optim result = {res:?}");
         println!("Elapsed = {:?}", now.elapsed());