diff --git a/Test/praktikum02/TriangleCheckerTest.java b/Test/praktikum02/TriangleCheckerTest.java
index e9d4b00..5922e86 100644
--- a/Test/praktikum02/TriangleCheckerTest.java
+++ b/Test/praktikum02/TriangleCheckerTest.java
@@ -14,4 +14,17 @@ class TriangleCheckerTest {
     void checkEquilateralTriangle(){
         assertEquals(TriangleChecker.TriangleType.EQUILATERAL,TriangleChecker.checkTriangle(1, 1, 1));
     }
+    @Test
+    void checkNegativ() {
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(-1, 3, 5));
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(3, 0, 5));
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(3, 5, -10));
+    }
+    @Test
+    void checkLength() {
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(20, 3, 5));
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(10, 20, 10));
+        assertEquals(TriangleChecker.TriangleType.NONE, TriangleChecker.checkTriangle(1, 1, 60));
+    }
+
 }
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