diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index 1ccee94..9fe8f3a 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -74,4 +74,10 @@ void test_absoluteDifference(void) {
     // Add more test cases for different inputs and expected outputs
 }
 
+void test_maximum(void) {
+    float result = maximum(5.0, 9.0);
+    TEST_ASSERT_FLOAT_WITHIN(0.000001, 9.0, result);
+    // Add more test cases for different inputs and expected outputs
+}
+
 #endif
\ No newline at end of file