diff --git a/tests/psa-client-server/psasim/src/psa_sim_serialise.c b/tests/psa-client-server/psasim/src/psa_sim_serialise.c
index 7caf4e5..264509c 100644
--- a/tests/psa-client-server/psasim/src/psa_sim_serialise.c
+++ b/tests/psa-client-server/psasim/src/psa_sim_serialise.c
@@ -319,3 +319,33 @@
 
     return 1;
 }
+
+size_t psasim_serialise_psa_status_t_needs(psa_status_t value)
+{
+    return psasim_serialise_int_needs(value);
+}
+
+int psasim_serialise_psa_status_t(uint8_t **pos, size_t *remaining, psa_status_t value)
+{
+    return psasim_serialise_int(pos, remaining, value);
+}
+
+int psasim_deserialise_psa_status_t(uint8_t **pos, size_t *remaining, psa_status_t *value)
+{
+    return psasim_deserialise_int(pos, remaining, value);
+}
+
+size_t psasim_serialise_psa_algorithm_t_needs(psa_algorithm_t value)
+{
+    return psasim_serialise_unsigned_int_needs(value);
+}
+
+int psasim_serialise_psa_algorithm_t(uint8_t **pos, size_t *remaining, psa_algorithm_t value)
+{
+    return psasim_serialise_unsigned_int(pos, remaining, value);
+}
+
+int psasim_deserialise_psa_algorithm_t(uint8_t **pos, size_t *remaining, psa_algorithm_t *value)
+{
+    return psasim_deserialise_unsigned_int(pos, remaining, value);
+}
diff --git a/tests/psa-client-server/psasim/src/psa_sim_serialise.h b/tests/psa-client-server/psasim/src/psa_sim_serialise.h
index 4ae0253..9cca7d8 100644
--- a/tests/psa-client-server/psasim/src/psa_sim_serialise.h
+++ b/tests/psa-client-server/psasim/src/psa_sim_serialise.h
@@ -270,3 +270,79 @@
  */
 int psasim_deserialise_return_buffer(uint8_t **pos, size_t *remaining,
                                      uint8_t *buffer, size_t buffer_length);
+
+/** Return how much buffer space is needed by \c psasim_serialise_psa_status_t()
+ *  to serialise a `psa_status_t`.
+ *
+ * \param value              The value that will be serialised into the buffer
+ *                           (needed in case some serialisations are value-
+ *                           dependent).
+ *
+ * \return                   The number of bytes needed in the buffer by
+ *                           \c psasim_serialise_psa_status_t() to serialise
+ *                           the given value.
+ */
+size_t psasim_serialise_psa_status_t_needs(psa_status_t value);
+
+/** Serialise a `psa_status_t` into a buffer.
+ *
+ * \param pos[in,out]        Pointer to a `uint8_t *` holding current position
+ *                           in the buffer.
+ * \param remaining[in,out]  Pointer to a `size_t` holding number of bytes
+ *                           remaining in the buffer.
+ * \param value              The value to serialise into the buffer.
+ *
+ * \return                   \c 1 on success ("okay"), \c 0 on error.
+ */
+int psasim_serialise_psa_status_t(uint8_t **pos, size_t *remaining, psa_status_t value);
+
+/** Deserialise a `psa_status_t` from a buffer.
+ *
+ * \param pos[in,out]        Pointer to a `uint8_t *` holding current position
+ *                           in the buffer.
+ * \param remaining[in,out]  Pointer to a `size_t` holding number of bytes
+ *                           remaining in the buffer.
+ * \param value              Pointer to a `psa_status_t` to receive the value
+ *                           deserialised from the buffer.
+ *
+ * \return                   \c 1 on success ("okay"), \c 0 on error.
+ */
+int psasim_deserialise_psa_status_t(uint8_t **pos, size_t *remaining, psa_status_t *value);
+
+/** Return how much buffer space is needed by \c psasim_serialise_psa_algorithm_t()
+ *  to serialise a `psa_algorithm_t`.
+ *
+ * \param value              The value that will be serialised into the buffer
+ *                           (needed in case some serialisations are value-
+ *                           dependent).
+ *
+ * \return                   The number of bytes needed in the buffer by
+ *                           \c psasim_serialise_psa_algorithm_t() to serialise
+ *                           the given value.
+ */
+size_t psasim_serialise_psa_algorithm_t_needs(psa_algorithm_t value);
+
+/** Serialise a `psa_algorithm_t` into a buffer.
+ *
+ * \param pos[in,out]        Pointer to a `uint8_t *` holding current position
+ *                           in the buffer.
+ * \param remaining[in,out]  Pointer to a `size_t` holding number of bytes
+ *                           remaining in the buffer.
+ * \param value              The value to serialise into the buffer.
+ *
+ * \return                   \c 1 on success ("okay"), \c 0 on error.
+ */
+int psasim_serialise_psa_algorithm_t(uint8_t **pos, size_t *remaining, psa_algorithm_t value);
+
+/** Deserialise a `psa_algorithm_t` from a buffer.
+ *
+ * \param pos[in,out]        Pointer to a `uint8_t *` holding current position
+ *                           in the buffer.
+ * \param remaining[in,out]  Pointer to a `size_t` holding number of bytes
+ *                           remaining in the buffer.
+ * \param value              Pointer to a `psa_algorithm_t` to receive the value
+ *                           deserialised from the buffer.
+ *
+ * \return                   \c 1 on success ("okay"), \c 0 on error.
+ */
+int psasim_deserialise_psa_algorithm_t(uint8_t **pos, size_t *remaining, psa_algorithm_t *value);
diff --git a/tests/psa-client-server/psasim/src/psa_sim_serialise.pl b/tests/psa-client-server/psasim/src/psa_sim_serialise.pl
index 092a448..2a6c388 100644
--- a/tests/psa-client-server/psasim/src/psa_sim_serialise.pl
+++ b/tests/psa-client-server/psasim/src/psa_sim_serialise.pl
@@ -32,12 +32,13 @@
 # deserialisation functions written manually (like those for the "buffer" type
 # are).
 #
-my @types = qw(unsigned-int int size_t buffer);
+my @types = qw(unsigned-int int size_t buffer psa_status_t psa_algorithm_t);
 grep(s/-/ /g, @types);
 
 # IS-A: Some data types are typedef'd; we serialise them as the other type
 my %isa = (
-    # e.g. "psa_status_t" => "int", but nothing for now
+    "psa_status_t" => "int",
+    "psa_algorithm_t" => "unsigned int",
 );
 
 if ($which eq "h") {