diff --git a/murphy-core/src/main/kotlin/io/murphy/core/effect/DelayEffect.kt b/murphy-core/src/main/kotlin/io/murphy/core/effect/DelayEffect.kt
index 2965bdd..d19d09e 100644
--- a/murphy-core/src/main/kotlin/io/murphy/core/effect/DelayEffect.kt
+++ b/murphy-core/src/main/kotlin/io/murphy/core/effect/DelayEffect.kt
@@ -1,7 +1,17 @@
 package io.murphy.core.effect
 
 import io.murphy.core.Effect
+import io.murphy.core.MurphyContext
+import io.murphy.core.MurphyResponse
 
 sealed class DelayEffect : Effect {
     abstract val duration: Long
+
+    override fun apply(context: MurphyContext): MurphyResponse? {
+        val d = duration
+        if (d > 0) {
+            Thread.sleep(d)
+        }
+        return null
+    }
 }
diff --git a/murphy-core/src/main/kotlin/io/murphy/core/effect/JitterEffect.kt b/murphy-core/src/main/kotlin/io/murphy/core/effect/JitterEffect.kt
index b8fb33b..72e74a9 100644
--- a/murphy-core/src/main/kotlin/io/murphy/core/effect/JitterEffect.kt
+++ b/murphy-core/src/main/kotlin/io/murphy/core/effect/JitterEffect.kt
@@ -1,7 +1,5 @@
 package io.murphy.core.effect
 
-import io.murphy.core.MurphyContext
-import io.murphy.core.MurphyResponse
 import java.util.concurrent.ThreadLocalRandom
 
 internal class JitterEffect(
@@ -11,12 +9,4 @@ internal class JitterEffect(
 
     override val duration: Long
         get() = if (min >= max) min else ThreadLocalRandom.current().nextLong(min, max + 1)
-
-    override fun apply(context: MurphyContext): MurphyResponse? {
-        val delay = duration
-        if (delay > 0) {
-            Thread.sleep(delay)
-        }
-        return null
-    }
 }
diff --git a/murphy-core/src/main/kotlin/io/murphy/core/effect/LatencyEffect.kt b/murphy-core/src/main/kotlin/io/murphy/core/effect/LatencyEffect.kt
index e15e98d..2849c5b 100644
--- a/murphy-core/src/main/kotlin/io/murphy/core/effect/LatencyEffect.kt
+++ b/murphy-core/src/main/kotlin/io/murphy/core/effect/LatencyEffect.kt
@@ -1,14 +1,3 @@
 package io.murphy.core.effect
 
-import io.murphy.core.MurphyContext
-import io.murphy.core.MurphyResponse
-
-internal class LatencyEffect(override val duration: Long) : DelayEffect() {
-
-    override fun apply(context: MurphyContext): MurphyResponse? {
-        if (duration > 0) {
-            Thread.sleep(duration)
-        }
-        return null
-    }
-}
+internal class LatencyEffect(override val duration: Long) : DelayEffect()
diff --git a/murphy-core/src/main/kotlin/io/murphy/core/effect/ProbabilisticDelayEffect.kt b/murphy-core/src/main/kotlin/io/murphy/core/effect/ProbabilisticDelayEffect.kt
index 16dfdaf..0f53219 100644
--- a/murphy-core/src/main/kotlin/io/murphy/core/effect/ProbabilisticDelayEffect.kt
+++ b/murphy-core/src/main/kotlin/io/murphy/core/effect/ProbabilisticDelayEffect.kt
@@ -1,7 +1,5 @@
 package io.murphy.core.effect
 
-import io.murphy.core.MurphyContext
-import io.murphy.core.MurphyResponse
 import java.util.concurrent.ThreadLocalRandom
 
 internal class ProbabilisticDelayEffect(
@@ -10,17 +8,10 @@ internal class ProbabilisticDelayEffect(
 ) : DelayEffect() {
 
     override val duration: Long
-        get() = delegate.duration
+        get() {
+            val roll = ThreadLocalRandom.current().nextDouble()
+            return if (roll <= probability) delegate.duration else 0L
+        }
 
     override fun probability(): Double = probability
-
-    override fun apply(context: MurphyContext): MurphyResponse? {
-        val roll = ThreadLocalRandom.current().nextDouble()
-
-        return if (roll <= probability) {
-            delegate.apply(context)
-        } else {
-            null
-        }
-    }
 }
diff --git a/murphy-core/src/test/kotlin/io/murphy/core/EffectsTest.kt b/murphy-core/src/test/kotlin/io/murphy/core/EffectsTest.kt
index 24bc37a..ab08a8c 100644
--- a/murphy-core/src/test/kotlin/io/murphy/core/EffectsTest.kt
+++ b/murphy-core/src/test/kotlin/io/murphy/core/EffectsTest.kt
@@ -237,6 +237,5 @@ class EffectsTest {
 
         assertIs<ProbabilisticDelayEffect>(effect)
         assertEquals(0.5, effect.probability())
-        assertTrue(effect.duration in 10..20)
     }
 }