diff --git a/exercises/tests/tests1.rs b/exercises/tests/tests1.rs
index b11221f..8ad5d27 100644
--- a/exercises/tests/tests1.rs
+++ b/exercises/tests/tests1.rs
@@ -10,7 +10,7 @@
 mod tests {
     #[test]
     fn you_can_assert() {
-        assert!();
+        assert!(true);
     }
 }
 
diff --git a/exercises/tests/tests2.rs b/exercises/tests/tests2.rs
index 6775d61..ea080b9 100644
--- a/exercises/tests/tests2.rs
+++ b/exercises/tests/tests2.rs
@@ -6,7 +6,7 @@
 mod tests {
     #[test]
     fn you_can_assert_eq() {
-        assert_eq!();
+        assert_eq!(true, true);
     }
 }
 
diff --git a/exercises/tests/tests3.rs b/exercises/tests/tests3.rs
index e10d2aa..737dc9a 100644
--- a/exercises/tests/tests3.rs
+++ b/exercises/tests/tests3.rs
@@ -13,7 +13,11 @@ mod tests {
 
     #[test]
     fn is_true_when_even() {
-        assert!();
+        assert!(is_even(42));
+    }
+
+    fn is_false_when_odd() {
+        assert!(!is_even(69));
     }
 }