diff --git a/unittests/model_tests/neuron/test_synaptic_manager.py b/unittests/model_tests/neuron/test_synaptic_manager.py
index ba1685b469..de49650bc6 100644
--- a/unittests/model_tests/neuron/test_synaptic_manager.py
+++ b/unittests/model_tests/neuron/test_synaptic_manager.py
@@ -104,7 +104,7 @@ def say_false(self, *args, **kwargs):
 
 def test_write_data_spec():
     unittest_setup()
-    set_config("Machine", "versions", VersionStrings.ANY.value)
+    set_config("Machine", "versions", VersionStrings.ANY.text)
     writer = SpynnakerDataWriter.mock()
     # UGLY but the mock transceiver NEED generate_on_machine to be False
     AbstractGenerateConnectorOnMachine.generate_on_machine = say_false
@@ -434,7 +434,7 @@ def test_pop_based_master_pop_table_standard(
         undelayed_indices_connected, delayed_indices_connected,
         n_pre_neurons, neurons_per_core, max_delay):
     unittest_setup()
-    set_config("Machine", "versions", VersionStrings.FOUR_PLUS.value)
+    set_config("Machine", "versions", VersionStrings.FOUR_PLUS.text)
     writer = SpynnakerDataWriter.mock()
 
     # Build a from list connector with the delays we want