diff --git a/test/test_addition.c b/test/test_addition.c
index 85143ac..0b3058a 100644
--- a/test/test_addition.c
+++ b/test/test_addition.c
@@ -7,9 +7,9 @@
 num carry[1];
 
 union {
-    float f;
-    unsigned int i;
-} a[5];
+    float floating;
+    unsigned int integer;
+} number[5];
 
 void setUp(void)
 {
@@ -138,19 +138,13 @@ void test_addition_addition_allunsignedinteger(void)
     TEST_ASSERT_EQUAL_UINT(expected[4], result[4]);
 }
 
-void test_addition_signnumber(void) {
+void test_addition_signfloatingnumber(void) {
     unsigned int result[2];
     unsigned int expected[2] = { 0, 1 };
-    union {
-        float f;
-        unsigned int i;
-    }a;
-
-    a.f = 1;
-    result[0] = s(a.i);
-
-    a.f = -1;
-    result[1] = s(a.i);
+    number[0].floating = 1, number[1].floating = -1;
+    
+    result[0] = s(number[0].integer);
+    result[1] = s(number[1].integer);
 
     TEST_ASSERT_EQUAL_UINT(expected[0], result[0]);
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
@@ -158,14 +152,14 @@ void test_addition_signnumber(void) {
 
 void test_addition_precisionfloatingnumber(void) {
     unsigned int result[5];
-    a[0].f = 0, a[1].f = -34753168, a[2].f = 75613594, a[3].f = -0.00000044568721, a[4].f = 0.0000004796123;
-    unsigned int expected[5] = { ( a[0].i << 9) >> 9 , ( a[1].i << 9) >> 9, ( a[2].i << 9) >> 9, ( a[3].i << 9) >> 9, ( a[4].i << 9) >> 9};
+    number[0].floating = 0, number[1].floating = -34753168, number[2].floating = 75613594, number[3].floating = -0.00000044568721, number[4].floating = 0.0000004796123;
+    unsigned int expected[5] = { ( number[0].integer << 9) >> 9 , ( number[1].integer << 9) >> 9, ( number[2].integer << 9) >> 9, ( number[3].integer << 9) >> 9, ( number[4].integer << 9) >> 9};
 
-    result[0] = m( a[0].i );
-    result[1] = m( a[1].i );
-    result[2] = m( a[2].i );
-    result[3] = m( a[3].i );
-    result[4] = m( a[4].i );
+    result[0] = m( number[0].integer );
+    result[1] = m( number[1].integer );
+    result[2] = m( number[2].integer );
+    result[3] = m( number[3].integer );
+    result[4] = m( number[4].integer );
 
     TEST_ASSERT_EQUAL_UINT(expected[0], result[0]);
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
@@ -176,9 +170,9 @@ void test_addition_precisionfloatingnumber(void) {
 
 void test_addition_addition_float_0plus0gleich0(void) {
     float result;
-    float expected = 0.0;
+    float expected = (float) 0.0;
 
-    result = addition_float(0.0, 0.0);
+    result = addition_float( (float) 0.0, (float) 0.0);
 
     TEST_ASSERT_EQUAL_FLOAT(expected, result);
 }