diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index 4423ae8..b0f2bd4 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -55,4 +55,11 @@ void test_power(void) {
     // Add more test cases for different inputs and expected outputs
 }
 
+void test_factorial(void) {
+    int result = factorial(5);
+    TEST_ASSERT_EQUAL_INT(120, result);
+    // Add more test cases for different inputs and expected outputs
+}
+
+
 #endif
\ No newline at end of file