diff --git a/exercises/leap/tests/leap.rs b/exercises/leap/tests/leap.rs
index 7aaa37137..422951686 100644
--- a/exercises/leap/tests/leap.rs
+++ b/exercises/leap/tests/leap.rs
@@ -14,12 +14,27 @@ fn test_any_old_year() {
 #[test]
 #[ignore]
 fn test_century() {
+    assert_eq!(leap::is_leap_year(1700), false);
+    assert_eq!(leap::is_leap_year(1800), false);
     assert_eq!(leap::is_leap_year(1900), false);
 }
 
 #[test]
 #[ignore]
 fn test_exceptional_centuries() {
+    assert_eq!(leap::is_leap_year(1600), true);
     assert_eq!(leap::is_leap_year(2000), true);
     assert_eq!(leap::is_leap_year(2400), true);
 }
+
+#[test]
+#[ignore]
+fn test_years_1600_to_1699() {
+    let incorrect_years = (1600..1700)
+        .filter(|&year| leap::is_leap_year(year) != (year % 4 == 0))
+        .collect::<Vec<_>>();
+
+    if !incorrect_years.is_empty() {
+        panic!("incorrect result for years: {:?}", incorrect_years);
+    }
+}