diff --git a/ophyd/tests/test_device.py b/ophyd/tests/test_device.py
index 73aeba21b..6cb48d4dc 100644
--- a/ophyd/tests/test_device.py
+++ b/ophyd/tests/test_device.py
@@ -47,24 +47,6 @@ def read_configuration(self):
         return {self.name + "_conf": {"value": 0}}
 
 
-class FakeBoolTriggerableDevice(Device):
-    """Common trigger signals expect value=1"""
-
-    strigger = Component(Signal, value=False, trigger_value=True)
-
-
-class FakeIntTriggerableDevice(Device):
-    """Common trigger signals expect value=1"""
-
-    strigger = Component(Signal, value=0, trigger_value=1)
-
-
-class FakeStrTriggerableDevice(Device):
-    """Some FPGA triggers on a custom string value."""
-
-    strigger = Component(Signal, value="", trigger_value="1!")
-
-
 def test_device_state():
     d = Device("test", name="test")
 
@@ -965,26 +947,26 @@ class MyDevice(Device):
 
 
 @pytest.mark.parametrize(
-    "klass, before, after, expected",
+    "before, after, expected",
     [
-        [FakeBoolTriggerableDevice, False, True, True],
-        [FakeBoolTriggerableDevice, False, False, False],
-        [FakeBoolTriggerableDevice, False, 1, True],  # odd, but True
-        [FakeBoolTriggerableDevice, False, "1", False],
-        [FakeIntTriggerableDevice, 0, 1, True],
-        [FakeIntTriggerableDevice, 0, "1", False],
-        [FakeIntTriggerableDevice, 0, "1!", False],
-        [FakeStrTriggerableDevice, "", "1!", True],
-        [FakeStrTriggerableDevice, "", 1, False],
-        [FakeStrTriggerableDevice, "", "1", False],
+        [False, True, True],
+        [0, 1, True],
+        [0, 0, False],
+        ["", "1!", True],
     ],
 )
-def test_trigger_value(klass, before, after, expected):
+def test_trigger_value(before, after, expected):
     """Ensure the configured trigger_value is used."""
-    d = klass("", name="test")
+
+    class FakeTriggerableDevice(Device):
+        """Common trigger signals expect value=1"""
+
+        strigger = Component(Signal, value=before, trigger_value=after)
+
+    d = FakeTriggerableDevice("", name="test")
     assert len(d.trigger_signals) == 1
     assert [d.strigger] == d.trigger_signals
     assert d.strigger.get() == before
 
     d.trigger()
-    assert (d.strigger.get() == after) == expected
+    assert d.strigger.get() == after