diff --git a/docs/protocol.rst b/docs/protocol.rst
index 68c0526..5c38dce 100644
--- a/docs/protocol.rst
+++ b/docs/protocol.rst
@@ -65,28 +65,23 @@ follows.
     : B;set_led: Set LED brightness. @brightness: Brightness.\0
     \0
 
-For more complex objects, like Tuples, Objects and Vectors, some more syntax is
-needed to communicate their structure to the host.
+For more complex objects, like Tuples and Vectors, some more syntax is needed
+to communicate their structure to the host.
 
-A Tuple type is encoded as a compound type, e.g., ``hB`` (a 16-bit integer and
-a byte). It can be recognised by the absence of a space between the type
-signatures. Note that a concatenated or nested Tuple type can not be recognised
-from its signature, e.g., ``hB`` concatenated with ``ff`` is indistinguishable
-from ``hBff``.
-
-An Object type is encoded as a compound type like a Tuple, but its type
-signature is enclosed in parentheses ``(`` and ``)``, which makes it possible
+A Tuple type is encoded as a compound type enclosed in parentheses ``(`` and
+``)``, e.g., ``(hB)`` (a 16-bit integer and a byte).
+The parentheses make it possible
 to communicate its structure to the host, e.g., the concatenation of ``(hB)``
-and ``(ff)`` is ``(hB)(ff)`` and the type signature of a nested Object may look
+and ``(ff)`` is ``(hB)(ff)`` and the type signature of a nested Tuple may look
 like this ``((hB)(ff))``.
 
 A Vector type signature is enclosed in brackets ``[`` and ``]``. So a vector of
 16-bit integers will have as type signature ``[h]``.
 
-Finally, any arbitrary combination of Tuples, Objects and Vectors can be made,
-resulting in type signatures like ``[((hB)f)]``, i.e., a Vector of Objects that
-contain a Tuple of which the first element is an other Object ``(hB)`` and
-the second element is a float ``f``.
+Finally, any arbitrary combination of Tuples and Vectors can be made, resulting
+in type signatures like ``[((hB)f)]``, i.e., a Vector of Tuples of which the
+first element is an other Tuple ``(hB)`` and the second element is a float
+``f``.
 
 
 Remote procedure calls
@@ -99,9 +94,9 @@ parameters, their values are written to the I/O device. After the parameter
 values have been received, the device executes the method and writes its return
 value (if any) back to the I/O device.
 
-All native C types (``int``, ``float``, ``double``, etc.), Tuples, Objects,
-Vectors and any combination of these are currently supported. The host is
-responsible for packing and unpacking of the values.
+All native C types (``int``, ``float``, ``double``, etc.), Tuples, Vectors and
+any combination of these are currently supported. The host is responsible for
+packing and unpacking of the values.
 
 
 .. _struct: https://docs.python.org/3.5/library/struct.html#format-strings
diff --git a/docs/usage.rst b/docs/usage.rst
index 7fbdfab..6a7a615 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -173,8 +173,8 @@ Arbitrary combinations of these higher order objects can be made to construct
 complex objects.
 
 In the following example, we create a 2-dimensional matrix of integers, a
-Vector of Tuples and an Object containing an integer, a Vector and an other
-Object respectively.
+Vector of Tuples and a Tuple containing an integer, a Vector and an other
+Tuple respectively.
 
 .. code-block:: cpp
 
@@ -182,10 +182,10 @@ Object respectively.
 
     Vector<Tuple<int, char> > v;
 
-    Object<int, Vector<int>, Object<char, long> > o;
+    Tuple<int, Vector<int>, Tuple<char, long> > t;
 
-These objects can be used for parameters as well as for return values. Note
-that these objects, like any higher order data structure should be passed by
+These objects can be used as parameters as well as return values. Note that
+these objects, like any higher order data structure should be passed by
 reference.
 
 
diff --git a/tests/arduino-serial-fixture b/tests/arduino-serial-fixture
index dc077fc..2dfbba3 160000
--- a/tests/arduino-serial-fixture
+++ b/tests/arduino-serial-fixture
@@ -1 +1 @@
-Subproject commit dc077fc5d9076e6d92ef99721e1e5081f22117d7
+Subproject commit 2dfbba300fe4b808b5672e7749e7c9e55f725979