diff --git a/src/__private__/__is_float.scad b/src/__private__/__is_float.scad
new file mode 100644
index 00000000..f5889769
--- /dev/null
+++ b/src/__private__/__is_float.scad
@@ -0,0 +1 @@
+function __is_float(value) = value + 0 != undef;
\ No newline at end of file
diff --git a/src/unittest.scad b/src/unittest.scad
index 53c44acd..2adffe67 100644
--- a/src/unittest.scad
+++ b/src/unittest.scad
@@ -1,3 +1,5 @@
+include <__private__/__is_float.scad>;
+
 module fail(title, message) {
     echo(
         str( 
@@ -84,8 +86,8 @@ module assertEqualPoints(expected, actual, float_digits = 4) {
 }
 
 module assertEqual(expected, actual, float_digits = 4) {
-    r_expected = round_n(expected, float_digits);  
-    r_actual = round_n(actual, float_digits);  
+    r_expected = __is_float(expected) ? round_n(expected, float_digits) : expected;  
+    r_actual = __is_float(actual) ? round_n(actual, float_digits) : actual;  
 
     if(r_expected != r_actual) {
         fail(
diff --git a/test/test_sub_str.scad b/test/test_sub_str.scad
index d97dd389..036d20bd 100644
--- a/test/test_sub_str.scad
+++ b/test/test_sub_str.scad
@@ -1,4 +1,3 @@
-
 include <unittest.scad>;
 include <sub_str.scad>;