diff --git a/argmin-math/src/primitives/minmax.rs b/argmin-math/src/primitives/minmax.rs
index 0ebac3382..499caaa24 100644
--- a/argmin-math/src/primitives/minmax.rs
+++ b/argmin-math/src/primitives/minmax.rs
@@ -48,4 +48,37 @@ make_minmax!(Complex<u64>);
 make_minmax!(Complex<isize>);
 make_minmax!(Complex<usize>);
 
-// TODO: tests!!!
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use paste::item;
+
+    macro_rules! make_test {
+        ($t:ty) => {
+            item! {
+                #[test]
+                fn [<test_minmax_ $t>]() {
+                    let x = 5 as $t;
+                    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);
+                }
+            }
+        }
+    }
+
+    make_test!(f32);
+    make_test!(f64);
+    make_test!(isize);
+    make_test!(usize);
+    make_test!(i8);
+    make_test!(u8);
+    make_test!(i16);
+    make_test!(u16);
+    make_test!(i32);
+    make_test!(u32);
+    make_test!(i64);
+    make_test!(u64);
+}