diff --git a/src/test/scala/com/github/agourlay/cornichon/examples/math/MathScenario.scala b/src/test/scala/com/github/agourlay/cornichon/examples/math/MathScenario.scala
index 0cbbe570c..d4f525de9 100644
--- a/src/test/scala/com/github/agourlay/cornichon/examples/math/MathScenario.scala
+++ b/src/test/scala/com/github/agourlay/cornichon/examples/math/MathScenario.scala
@@ -18,7 +18,7 @@ class MathScenario extends CornichonFeature with MathSteps {
 
     }
 
-    Scenario("Random draw should eventually converge") {
+    Scenario("Random draw should eventually be identical") {
 
       When I generate_random_int("random-1")
 
@@ -33,7 +33,7 @@ class MathScenario extends CornichonFeature with MathSteps {
 
     Scenario("MonteCarlo approximation of PI") {
 
-      Repeat(1000) {
+      Repeat(5000) {
 
         Given I generate_random_double("x")
 
@@ -45,7 +45,9 @@ class MathScenario extends CornichonFeature with MathSteps {
 
       And I estimate_pi_from_ratio("inside", "pi")
 
-      Then assert double_value_between("pi", 3.10, 3.16)
+      Then assert double_value("pi").isBetween(3.1, 3.2)
+
+      And I show_session("pi")
 
     }
   }
diff --git a/src/test/scala/com/github/agourlay/cornichon/examples/math/MathSteps.scala b/src/test/scala/com/github/agourlay/cornichon/examples/math/MathSteps.scala
index b7161c4b4..42f2c67cb 100644
--- a/src/test/scala/com/github/agourlay/cornichon/examples/math/MathSteps.scala
+++ b/src/test/scala/com/github/agourlay/cornichon/examples/math/MathSteps.scala
@@ -20,7 +20,7 @@ trait MathSteps {
 
   def generate_random_int(target: String, max: Int = 100) =
     EffectStep(
-      title = s"Generate random Int into $target (max=$max)",
+      title = s"Generate random Int into '$target' (max=$max)",
       effect = s ⇒ {
       s.addValue(target, Random.nextInt(max).toString)
     }
@@ -28,22 +28,24 @@ trait MathSteps {
 
   def generate_random_double(target: String) =
     EffectStep(
-      title = s"Generate random Double into $target",
+      title = s"Generate random Double into '$target'",
       effect = s ⇒ {
       s.addValue(target, Random.nextDouble().toString)
     }
     )
 
-  def double_value_between(source: String, low: Double, high: Double) =
-    AssertStep(
-      title = s"Double value of $source is between $low and $high",
-      action = s ⇒ {
-      val v = s.get(source).toDouble
-      DetailedStepAssertion(true, v > low && v < high, ratioError(v, low, high))
-    }
-    )
+  case class double_value(source: String) {
+    def isBetween(low: Double, high: Double) =
+      AssertStep(
+        title = s"Double value of '$source' is between '$low' and '$high'",
+        action = s ⇒ {
+        val v = s.get(source).toDouble
+        DetailedStepAssertion(true, v > low && v < high, ratioError(v, low, high))
+      }
+      )
+  }
 
-  def ratioError(v: Double, low: Double, high: Double): Boolean ⇒ String = b ⇒ s"$v is not between $low and $high"
+  private def ratioError(v: Double, low: Double, high: Double): Boolean ⇒ String = b ⇒ s"$v is not between $low and $high"
 
   def calculate_point_in_circle(target: String) = EffectStep(
     title = s"Calculate points inside circle",
@@ -57,7 +59,7 @@ trait MathSteps {
 
   def estimate_pi_from_ratio(inside: String, target: String) =
     EffectStep(
-      title = s"Estimate PI from ration into $target",
+      title = s"Estimate PI from ration into key '$target'",
       effect = s ⇒ {
       val insides = s.getHistory(inside)
       val trial = insides.size