diff --git a/server/src/skill.rs b/server/src/skill.rs
index dd6ce388..45735472 100755
--- a/server/src/skill.rs
+++ b/server/src/skill.rs
@@ -456,6 +456,8 @@ impl Skill {
             Skill::Stun => 2,
             Skill::Block => 1,
 
+            Skill::Decay => 3,
+
             Skill::TestBlock => 1,
             Skill::TestStun => 2,
             _ => panic!("{:?} does not have a duration", self),
@@ -557,6 +559,30 @@ mod tests {
 
         println!("{:?}", resolution);
     }
+
+    #[test]
+    fn decay_test() {
+        let mut x = Cryp::new()
+            .named(&"muji".to_string())
+            .level(8)
+            .learn(Skill::Decay)
+            .create();
+
+        let mut y = Cryp::new()
+            .named(&"camel".to_string())
+            .level(8)
+            .create();
+
+        let mut resolution = Resolution { base: 0, result: None, text: String::new() };
+        decay(&mut x, &mut y, &mut resolution);
+
+        assert!(y.effects.iter().any(|e| e.effect == Effect::Decay));
+
+        y.reduce_effect_durations();
+        let decay = y.effects.iter().find(|e| e.effect == Effect::Decay);
+        assert!(y.hp.value == y.stamina.value.saturating_sub(decay.unwrap().tick.unwrap().amount));
+    }
+
 }
 
 // #[derive(Debug,Clone,Copy,PartialEq,Serialize,Deserialize)]