diff --git a/argmin-math/src/primitives/minmax.rs b/argmin-math/src/primitives/minmax.rs
index 14b1527e3..e66f3b041 100644
--- a/argmin-math/src/primitives/minmax.rs
+++ b/argmin-math/src/primitives/minmax.rs
@@ -64,6 +64,8 @@ mod tests {
                     let y = 10 as $t;
                     assert_eq!(<$t as ArgminMinMax>::min(&x, &y), x);
                     assert_eq!(<$t as ArgminMinMax>::max(&x, &y), y);
+                    assert_eq!(<$t as ArgminMinMax>::min(&y, &x), x);
+                    assert_eq!(<$t as ArgminMinMax>::max(&y, &x), y);
                 }
             }
         }
@@ -71,4 +73,4 @@ mod tests {
 
     make_test!(f32);
     make_test!(f64);
-}
+}
\ No newline at end of file