diff --git a/test/test_convert_cm_in_dm.c b/test/test_convert_cm_in_dm.c
index 6cf23e3..112ee0d 100644
--- a/test/test_convert_cm_in_dm.c
+++ b/test/test_convert_cm_in_dm.c
@@ -22,4 +22,11 @@ void test_cm_to_dm2(void) {
     double expectedResult_2 = 5.0;
     double result_2 = cm_to_dm(value_2);
     TEST_ASSERT_EQUAL_FLOAT(expectedResult_2, result_2);
+}
+void test_cm_to_dm3(void) {
+    // Testfall 3: 200 cm sollten 20 Dezimeter sein
+    double value_3 = 200.0;
+    double expectedResult_3 = 20.0;
+    double result_3 = cm_to_dm(value_3);
+    TEST_ASSERT_EQUAL_FLOAT(expectedResult_3, result_3);
 }
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