diff --git a/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/InheritanceHelper.kt b/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/InheritanceHelper.kt
index bdb1498..81901d5 100644
--- a/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/InheritanceHelper.kt
+++ b/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/InheritanceHelper.kt
@@ -61,11 +61,9 @@ internal class Graph<E, D>(
         }
 
         while (!queue.isEmpty()) {
-            println("Queue: ${queue.map { "${it.descriptor}"  }}")
             val vertex = queue.remove()
             orderedList.add(vertex)
             visitedNodes++
-            println("${vertex.descriptor} has incoming ${adjacencyMap[vertex]!!.map { it.descriptor }}")
             adjacencyMap[vertex]!!.forEach {
                 it.inDegree--
                 if (it.inDegree == 0) queue.add(it)
diff --git a/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/Processor.kt b/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/Processor.kt
index 8438398..72a483e 100644
--- a/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/Processor.kt
+++ b/koru-processor/src/jvmMain/kotlin/com/futuremind/koru/processor/Processor.kt
@@ -67,7 +67,6 @@ class Processor : AbstractProcessor() {
                     generatedInterfaces = generatedInterfaces,
                     targetDir = kaptGeneratedDir
                 )
-                println("Generated: ${generatedInterface.name} from $typeName")
                 generatedInterfaces[typeName] = generatedInterface
             }
 
diff --git a/koru-processor/src/jvmTest/kotlin/com/futuremind/koru/processor/InheritanceSortTest.kt b/koru-processor/src/jvmTest/kotlin/com/futuremind/koru/processor/InheritanceSortTest.kt
index 4c31e79..dbb90e2 100644
--- a/koru-processor/src/jvmTest/kotlin/com/futuremind/koru/processor/InheritanceSortTest.kt
+++ b/koru-processor/src/jvmTest/kotlin/com/futuremind/koru/processor/InheritanceSortTest.kt
@@ -3,6 +3,7 @@ package com.futuremind.koru.processor
 import com.futuremind.koru.processor.InheritanceSortTest.Ver.*
 import org.junit.jupiter.api.Assertions.*
 import org.junit.jupiter.api.Test
+import java.lang.IllegalArgumentException
 
 internal class InheritanceSortTest {
 
@@ -60,6 +61,24 @@ internal class InheritanceSortTest {
 
     }
 
+    @Test
+    fun `should throw on cyclic graph`() {
+        val graph = Graph(listOf(a, b))
+        graph.addEdge(a, b)
+        graph.addEdge(b, a)
+        assertThrows(IllegalArgumentException::class.java) { graph.topologicalOrder() }
+    }
+
+    @Test
+    fun `should throw on cyclic graph (larger)`() {
+        val graph = Graph(listOf(a, b, c, d))
+        graph.addEdge(a, b)
+        graph.addEdge(b, c)
+        graph.addEdge(c, d)
+        graph.addEdge(d, a)
+        assertThrows(IllegalArgumentException::class.java) { graph.topologicalOrder() }
+    }
+
     private fun test(
         graph: Graph<Ver, Ver>,
         expectedSorted: List<Vertex<Ver, Ver>>