diff --git a/tests/tti355.py b/tests/tti355.py
deleted file mode 100644
index 45966344..00000000
--- a/tests/tti355.py
+++ /dev/null
@@ -1,78 +0,0 @@
-import unittest
-from parameterized import parameterized
-
-from common_tests.tti_common import TtiCommon
-from utils.channel_access import ChannelAccess
-from utils.ioc_launcher import get_default_ioc_dir
-from utils.test_modes import TestModes
-from utils.testing import get_running_lewis_and_ioc, skip_if_recsim
-
-
-DEVICE_PREFIX = "TTI355_01"
-DEVICE_NAME = "tti355"
-
-VOLT_LOW_LIMIT = 0.0
-VOLT_HIGH_LIMIT = 35.0
-CURR_LOW_LIMIT = 0.01
-CURR_HIGH_LIMIT = 5.0
-
-IOCS = [
-    {
-        "name": DEVICE_PREFIX,
-        "directory": get_default_ioc_dir("TTI355"),
-        "macros": {
-            "MIN_VOLT": VOLT_LOW_LIMIT,
-            "MAX_VOLT": VOLT_HIGH_LIMIT,
-            "MIN_CURR": CURR_LOW_LIMIT,
-            "MAX_CURR": CURR_HIGH_LIMIT,
-        },
-        "emulator": DEVICE_NAME,
-    },
-]
-
-
-TEST_MODES = [TestModes.RECSIM, TestModes.DEVSIM]
-
-
-class Tti355Tests(TtiCommon, unittest.TestCase):
-    """
-    Tests for the Tti355 IOC.
-    """
-    def setUp(self):
-        self._lewis, self._ioc = get_running_lewis_and_ioc(DEVICE_NAME, DEVICE_PREFIX)
-        self.ca = ChannelAccess(device_prefix=DEVICE_PREFIX)
-        self._lewis.backdoor_run_function_on_device("reset")
-
-    def get_on_state_name(self):
-        return "ON"
-
-    def get_off_state_name(self):
-        return "OFF"
-
-    @parameterized.expand([
-        ("lt_low_limit", VOLT_LOW_LIMIT-1.0, "low_limit", VOLT_LOW_LIMIT),
-        ("gt_high_limit", VOLT_HIGH_LIMIT+1, "high_limit", VOLT_HIGH_LIMIT)])
-    @skip_if_recsim("Behaviour cannot be simulated in Recsim")
-    def test_WHEN_voltage_setpoint_is_set_outside_max_limits_THEN_setpoint_within(self, case, case_value, limit, limit_value):
-        self.ca.set_pv_value("VOLTAGE:SP", case_value)
-        self.ca.assert_that_pv_is("VOLTAGE:SP", limit_value)
-
-    @parameterized.expand([
-        ("lt_low_limit", CURR_LOW_LIMIT-1, "low_limit", CURR_LOW_LIMIT),
-        ("gt_high_limit", CURR_HIGH_LIMIT+1, "high_limit", CURR_HIGH_LIMIT)])
-    @skip_if_recsim("Behaviour cannot be simulated in Recsim")
-    def test_WHEN_voltage_setpoint_is_set_outside_max_limits_THEN_setpoint_within(self, case, case_value, limit, limit_value):
-        self.ca.set_pv_value("CURRENT:SP", case_value)
-        self.ca.assert_that_pv_is("CURRENT:SP", limit_value)
-
-    @skip_if_recsim("Behaviour cannot be simulated in Recsim")
-    def test_WHEN_identity_requested_THEN_correct_identity_returned(self):
-        expected_identity = "Thurlby Thandar,EL302P,0,v1.14"
-        self.ca.assert_that_pv_is("IDENT", expected_identity)
-
-    @skip_if_recsim("Behaviour cannot be simulated in Recsim")
-    def test_WHEN_ioc_in_error_state_2_THEN_correct_error_state_returned(self):
-        expected_value = "Cmd outside limits"
-        self._lewis.backdoor_set_on_device("error", "ERR 2")
-        self.ca.set_pv_value("ERROR.PROC", 1)
-        self.ca.assert_that_pv_is("ERROR", expected_value)