diff --git a/src/TriangleChecker.java b/src/TriangleChecker.java
index 3584d04..490e226 100644
--- a/src/TriangleChecker.java
+++ b/src/TriangleChecker.java
@@ -48,7 +48,7 @@ public class TriangleChecker {
   // Analyse der Dreiecksart
   public static TriangleType checkTriangle(float a, float b, float c) {
 
-    if (a+b>c || b+c>a || a+c>b) {
+    if ((a+b>c || b+c>a || a+c>b) && (a>0 && b>0 && c>0)) {
 
       if (a==b && b==c) {
         return TriangleType.EQUILATERAL;
diff --git a/test/TriangleCheckerTest.java b/test/TriangleCheckerTest.java
index c6b4082..d165497 100644
--- a/test/TriangleCheckerTest.java
+++ b/test/TriangleCheckerTest.java
@@ -7,15 +7,15 @@ public class TriangleCheckerTest {
     public void testValidTriangle() {
 
         // Arrange
-        float a = 2;
-        float b = 2;
+        float a = 0;
+        float b = 0;
         float c = 2;
 
         // Act
         TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
 
         // Assert
-        assertEquals(TriangleChecker.TriangleType.EQUILATERAL, type);
+        assertEquals(TriangleChecker.TriangleType.NONE, type);
 
     }