diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_binmap.py b/tests/test_binmap.py
index 9f136b7..7d494d7 100644
--- a/tests/test_binmap.py
+++ b/tests/test_binmap.py
@@ -109,11 +109,11 @@ def test_value_bounds(self):
         t = Temp()
         with pytest.raises(struct.error) as excinfo:
             t.temp = 256
-        assert "ubyte format requires 0 <= number <= 255" in str(excinfo)
+        assert "format requires 0 <= number <= 255" in str(excinfo)
 
         with pytest.raises(struct.error) as excinfo:
             t.temp = -1
-        assert "ubyte format requires 0 <= number <= 255" in str(excinfo)
+        assert "format requires 0 <= number <= 255" in str(excinfo)
 
     def test_compare_equal(self):
         t1 = Temp(temp=10)