diff --git a/src/unity.c b/src/unity.c
index c755ebb367234d7053eca97131d99d5c80193546..af5f838aff280086b918c09dfa66e62cb1553621 100644
--- a/src/unity.c
+++ b/src/unity.c
@@ -688,11 +688,11 @@ void UnityAssertEqualIntArray(UNITY_INTERNAL_PTR expected,
 /*-----------------------------------------------*/
 /* Wrap this define in a function with variable types as float or double */
 #define UNITY_FLOAT_OR_DOUBLE_WITHIN(delta, expected, actual, diff)                       \
-    if (isinf(expected) && isinf(actual) && (isneg(expected) == isneg(actual))) return 1; \
+    if (isinf(expected) && isinf(actual) && ((expected < 0) == (actual < 0))) return 1;   \
     if (UNITY_NAN_CHECK) return 1;                                                        \
     diff = actual - expected;                                                             \
-    if (diff < 0.0f) diff = 0.0f - diff;                                                  \
-    if (delta < 0.0f) delta = 0.0f - delta;                                               \
+    if (diff < 0) diff = -diff;                                                           \
+    if (delta < 0) delta = -delta;                                                        \
     return !(isnan(diff) || isinf(diff) || (diff > delta))
     /* This first part of this condition will catch any NaN or Infinite values */
 #ifndef UNITY_NAN_NOT_EQUAL_NAN
@@ -793,11 +793,11 @@ void UnityAssertFloatSpecial(const UNITY_FLOAT actual,
     {
         case UNITY_FLOAT_IS_INF:
         case UNITY_FLOAT_IS_NOT_INF:
-            is_trait = isinf(actual) & ispos(actual);
+            is_trait = isinf(actual) && (actual > 0);
             break;
         case UNITY_FLOAT_IS_NEG_INF:
         case UNITY_FLOAT_IS_NOT_NEG_INF:
-            is_trait = isinf(actual) & isneg(actual);
+            is_trait = isinf(actual) && (actual < 0);
             break;
 
         case UNITY_FLOAT_IS_NAN:
@@ -805,13 +805,9 @@ void UnityAssertFloatSpecial(const UNITY_FLOAT actual,
             is_trait = isnan(actual) ? 1 : 0;
             break;
 
-        /* A determinate number is non infinite and not NaN. (therefore the opposite of the two above) */
-        case UNITY_FLOAT_IS_DET:
+        case UNITY_FLOAT_IS_DET: /* A determinate number is non infinite and not NaN. */
         case UNITY_FLOAT_IS_NOT_DET:
-            if (isinf(actual) || isnan(actual))
-                is_trait = 0;
-            else
-                is_trait = 1;
+            is_trait = !isinf(actual) && !isnan(actual);
             break;
 
         default:
@@ -922,11 +918,11 @@ void UnityAssertDoubleSpecial(const UNITY_DOUBLE actual,
     {
         case UNITY_FLOAT_IS_INF:
         case UNITY_FLOAT_IS_NOT_INF:
-            is_trait = isinf(actual) & ispos(actual);
+            is_trait = isinf(actual) && (actual > 0);
             break;
         case UNITY_FLOAT_IS_NEG_INF:
         case UNITY_FLOAT_IS_NOT_NEG_INF:
-            is_trait = isinf(actual) & isneg(actual);
+            is_trait = isinf(actual) && (actual < 0);
             break;
 
         case UNITY_FLOAT_IS_NAN:
@@ -934,13 +930,9 @@ void UnityAssertDoubleSpecial(const UNITY_DOUBLE actual,
             is_trait = isnan(actual) ? 1 : 0;
             break;
 
-        /* A determinate number is non infinite and not NaN. (therefore the opposite of the two above) */
-        case UNITY_FLOAT_IS_DET:
+        case UNITY_FLOAT_IS_DET: /* A determinate number is non infinite and not NaN. */
         case UNITY_FLOAT_IS_NOT_DET:
-            if (isinf(actual) || isnan(actual))
-                is_trait = 0;
-            else
-                is_trait = 1;
+            is_trait = !isinf(actual) && !isnan(actual);
             break;
 
         default:
diff --git a/src/unity_internals.h b/src/unity_internals.h
index 34f0bd3a76f9b046c215af87ce0f5de55fb2499b..b0311dcdeeb0ae6ee19ed857712ac072702020f3 100644
--- a/src/unity_internals.h
+++ b/src/unity_internals.h
@@ -187,6 +187,7 @@
 #endif
 typedef UNITY_FLOAT_TYPE UNITY_FLOAT;
 
+/* isinf & isnan macros should be provided by math.h */
 #ifndef isinf
 /* The value of Inf - Inf is NaN */
 #define isinf(n) (isnan((n) - (n)) && !isnan(n))
@@ -198,14 +199,6 @@ typedef UNITY_FLOAT_TYPE UNITY_FLOAT;
 #define isnan(n) ((n != n) ? 1 : 0)
 #endif
 
-#ifndef isneg
-#define isneg(n) ((n < 0.0f) ? 1 : 0)
-#endif
-
-#ifndef ispos
-#define ispos(n) ((n > 0.0f) ? 1 : 0)
-#endif
-
 #endif
 
 /*-------------------------------------------------------
@@ -243,7 +236,7 @@ typedef UNITY_FLOAT_TYPE UNITY_FLOAT;
 
   /* Double Floating Point Support */
   #ifndef UNITY_DOUBLE_PRECISION
-  #define UNITY_DOUBLE_PRECISION (1e-12f)
+  #define UNITY_DOUBLE_PRECISION (1e-12)
   #endif
 
   #ifndef UNITY_DOUBLE_TYPE
diff --git a/test/tests/testunity.c b/test/tests/testunity.c
index 08c621af3425036feb14ba0d60ed0b6a5c1cec41..e81e57a45f86e7ece77c9c1eb036ffc00cda26db 100644
--- a/test/tests/testunity.c
+++ b/test/tests/testunity.c
@@ -3274,8 +3274,9 @@ void testFloatPrinting(void)
     TEST_ASSERT_EQUAL_PRINT_FLOATING("8.3099991e+09",  8309999104.0f);
     TEST_ASSERT_EQUAL_PRINT_FLOATING("1.0e+10",        1.0e+10f);
     TEST_ASSERT_EQUAL_PRINT_FLOATING("1.0e+10",        10000000000.0f);
-    TEST_ASSERT_EQUAL_PRINT_FLOATING("1.00005499e+10", 1.000055e+10f);
-    TEST_ASSERT_EQUAL_PRINT_FLOATING("1.10000006e+38", 1.10000005e+38f);
+    /* Some compilers have trouble with inexact float constants, a float cast works generally */
+    TEST_ASSERT_EQUAL_PRINT_FLOATING("1.00005499e+10", (float)1.000055e+10f);
+    TEST_ASSERT_EQUAL_PRINT_FLOATING("1.10000006e+38", (float)1.10000005e+38f);
     TEST_ASSERT_EQUAL_PRINT_FLOATING("1.63529943e+10", 1.63529943e+10f);
     TEST_ASSERT_EQUAL_PRINT_FLOATING("3.40282347e+38", 3.40282346638e38f);