diff --git a/tests/test_mathutils.py b/tests/test_mathutils.py
index 38d7ae1..42915e9 100644
--- a/tests/test_mathutils.py
+++ b/tests/test_mathutils.py
@@ -95,9 +95,14 @@ def test_bits():
     chk(Bits('11') >> 1, Bits('1'))
     chk(Bits('1') << 1, Bits('10'))
     assert Bits('0') != Bits('00')
-    chk(
-        Bits.from_bytes(Bits.from_hex(Bits('10101010').as_bytes()).as_hex()),
+    # test roundtrip as_/from_hex
+    chk(Bits.from_hex(Bits('10101010').as_hex()),
         Bits('10101010'))
+    # test roundtrip as_/from_bytes
+    chk(
+        Bits.from_bytes(Bits('10101010').as_bytes()),
+        Bits('10101010'))
+    # pile of roundtripping
     chk(Bits.from_int(
             Bits.from_bin(
                 Bits.from_list(