diff --git a/test/kgV/test_kgV.c b/test/kgV/test_kgV.c
index 2b1359f..95918dc 100644
--- a/test/kgV/test_kgV.c
+++ b/test/kgV/test_kgV.c
@@ -95,3 +95,16 @@ void test_kgVOfSecondNumberNegative(){
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }
+
+void test_kgVOfBothNumbersNegative(){
+    //arrange
+    int a = -2;
+    int b = -17;
+    int expected = 34;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}