diff --git a/03-roman-numerals/roman.py b/03-roman-numerals/roman.py
index d884199..57dcb9c 100644
--- a/03-roman-numerals/roman.py
+++ b/03-roman-numerals/roman.py
@@ -1,19 +1,20 @@
-def roman( self ):
+def roman( amount ):
 	romanNum = []
-	symbols = ( ( 'M', 1000 ), ( 'C', 100 ), ( 'XC', 90 ), ( 'L', 50 ), ( 'X', 10 ),
-		( 'IX', 9 ), ('V', 5 ) , ( 'IV', 4 ), ( 'I', 1 ) )
+	symbols = (
+		( 'M', 1000 ),
+		( 'C', 100 ),
+		( 'XC', 90 ),
+		( 'L', 50 ),
+		( 'X', 10 ),
+		( 'IX', 9 ),
+		('V', 5 ) ,
+		( 'IV', 4 ),
+		( 'I', 1 )
+	)
 
 	for symbol, value in symbols:
-		while self >= value:
-			self -= value
+		while amount >= value:
+			amount -= value
 			romanNum.append( symbol )
 
-	return ''.join( romanNum )
-
-assert roman( 11 ) == "XI", "11 should return XI"
-assert roman( 60 ) == "LX", "60 should return LX"
-assert roman( 78 ) == "LXXVIII", "78 should return LXXVIII"
-assert roman( 4 ) == "IV", "4 should return IV"
-assert roman( 99 ) == "XCIX", "99 should return XCIX"
-
-# Add your own assert tests below
\ No newline at end of file
+	return ''.join( romanNum )
\ No newline at end of file