diff --git a/src/main/scala/com.github.mgifos.workouts/model/WeeklyPlan.scala b/src/main/scala/com.github.mgifos.workouts/model/WeeklyPlan.scala
index 88aef36..1fb0808 100644
--- a/src/main/scala/com.github.mgifos.workouts/model/WeeklyPlan.scala
+++ b/src/main/scala/com.github.mgifos.workouts/model/WeeklyPlan.scala
@@ -10,15 +10,14 @@ class WeeklyPlan(csv: Array[Byte]) {
 
   private lazy val processed: Seq[Option[Workout]] = {
 
-    def weekPlan(week: Week, acc: Seq[Option[Workout]]): Seq[Option[Workout]] = Seq.tabulate(7) { weekDayNo =>
-      val maybeDayText = week.lift(weekDayNo + 1).flatMap(text => Option(text.trim).filter(_.nonEmpty))
-      maybeDayText.map { dayText =>
-        Workout.parseDef(dayText) match {
-          case Right(definition) => definition
-          case Left(_) => onlyDefs(acc).find(_.name == dayText).map(_.toRef).getOrElse(WorkoutNote(dayText))
-        }
+    def weekPlan(week: Week, previousWeeks: Seq[Option[Workout]]): Seq[Option[Workout]] = Seq.tabulate(7) { weekDayNo =>
+      week.lift(weekDayNo + 1).flatMap(text => Option(text.trim).filter(_.nonEmpty))
+    }.foldLeft(Seq.empty[Option[Workout]])((acc, maybeDayText) => acc :+ maybeDayText.map { dayText =>
+      Workout.parseDef(dayText) match {
+        case Right(definition) => definition
+        case Left(_) => onlyDefs(previousWeeks ++ acc).find(_.name == dayText).map(_.toRef).getOrElse(WorkoutNote(dayText))
       }
-    }
+    })
 
     def loop(weeks: List[Week], acc: Seq[Option[Workout]]): Seq[Option[Workout]] = weeks match {
       case Nil => acc
diff --git a/src/test/scala/com/github/mgifos/workouts/WeekPlanSpec.scala b/src/test/scala/com/github/mgifos/workouts/WeekPlanSpec.scala
new file mode 100644
index 0000000..b48567a
--- /dev/null
+++ b/src/test/scala/com/github/mgifos/workouts/WeekPlanSpec.scala
@@ -0,0 +1,17 @@
+package com.github.mgifos.workouts
+
+import com.github.mgifos.workouts.model._
+import org.scalatest.{ FlatSpec, Matchers }
+
+class WeekPlanSpec extends FlatSpec with Matchers {
+
+  val runFast = "running: run-fast\n- warmup: 10:00\n- repeat: 2\n  - run: 1500m @ 4:30-5:00\n  - recover: 01:30 @ z2\n- cooldown: lap-button"
+  val runSlow = "running: run-slow\n- warmup: 10:00\n- run: 5km @ z2\n- cooldown: lap-button"
+  val testPlan = s"""1,"$runFast",,run-fast,,run-fast,,,\n2,,run-fast,"$runSlow",run-fast,,run-slow,,"""
+
+  "WeekPlan" should "detect workout definitions and references properly" in {
+    val plan = new WeeklyPlan(testPlan.getBytes)
+    plan.get.flatten should have size 7
+    plan.workouts should have size 2
+  }
+}
diff --git a/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala b/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala
index caf1d3b..3622ae6 100644
--- a/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala
+++ b/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala
@@ -40,7 +40,6 @@ class WorkoutSpec extends FlatSpec with Matchers {
 
     testNames.foreach { testName =>
       val x = Workout.parseDef(testWO.replace("run-fast", testName))
-      println(x)
       x.right.get.name should be(testName)
     }
   }