diff --git a/test/test_convert_M_in_KM.c b/test/test_convert_M_in_KM.c
new file mode 100644
index 0000000..0a0b4c3
--- /dev/null
+++ b/test/test_convert_M_in_KM.c
@@ -0,0 +1,18 @@
+#include "../src/convert_M_in_KM.h"
+#include "unity.h"
+#include "limits.h"
+
+void setUp(void) {
+    // Set up resources here if needed
+}
+
+void tearDown(void) {
+    // Clean up resources here if needed
+}
+void test_meter_to_kilometer(void) {
+    // Testfall 1: 1000 Meter sollten 1 Kilometer sein
+    double value_1 = 1000.0;
+    double expectedResult_1 = 1.0;
+    double result_1 = meter_to_kilometer(value_1);
+    TEST_ASSERT_EQUAL_FLOAT(expectedResult_1, result_1);
+}