diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index a587b27..5af7fb7 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -266,8 +266,8 @@ void test_weight_at_mass100(void)
     float expected = 981;
 
     /* act */;
-    float m = 100;
-    actual = calculateWeight(m);
+    float mass = 100;
+    actual = calculateWeight(mass);
 
     /* assert */
     TEST_ASSERT_EQUAL_FLOAT(expected, actual);