diff --git a/test/mathutil.lua b/test/mathutil.lua
index 84cd8d3..e8e1aa2 100644
--- a/test/mathutil.lua
+++ b/test/mathutil.lua
@@ -5,24 +5,13 @@ dofile("./mods/utils/test.lua")
 -- Load the file for testing.
 dofile("./mods/utils/list.lua")
 dofile("./mods/utils/mathutil.lua")
-dofile("./mods/utils/numberutil.lua")
 dofile("./mods/utils/tableutil.lua")
 
 
-test.start("numberutil")
+test.start("mathutil")
 
 
 test.run("cantor_pairing", function()
 	test.equals(3192, mathutil.cantor_pairing(47, 32))
 end)
 
-test.run("format", function()
-	test.equals("12", numberutil.format(12))
-	test.equals("12.74632", numberutil.format(12.74632))
-	test.equals("12,121,212.74", numberutil.format(12121212.74))
-	test.equals("-12,121,212.74", numberutil.format(-12121212.74))
-	
-	test.equals("1#123#456#789$588", numberutil.format(1123456789.58823347239, 3, "$", "#"))
-	test.equals("12.00000", numberutil.format(12, 5))
-end)
-
diff --git a/test/numberutil.lua b/test/numberutil.lua
new file mode 100644
index 0000000..fa13dfa
--- /dev/null
+++ b/test/numberutil.lua
@@ -0,0 +1,24 @@
+
+-- Load the test file.
+dofile("./mods/utils/test.lua")
+
+-- Load the file for testing.
+dofile("./mods/utils/list.lua")
+dofile("./mods/utils/mathutil.lua")
+dofile("./mods/utils/numberutil.lua")
+dofile("./mods/utils/tableutil.lua")
+
+
+test.start("numberutil")
+
+
+test.run("format", function()
+	test.equals("12", numberutil.format(12))
+	test.equals("12.74632", numberutil.format(12.74632))
+	test.equals("12,121,212.74", numberutil.format(12121212.74))
+	test.equals("-12,121,212.74", numberutil.format(-12121212.74))
+	
+	test.equals("1#123#456#789$588", numberutil.format(1123456789.58823347239, 3, "$", "#"))
+	test.equals("12.00000", numberutil.format(12, 5))
+end)
+