diff --git a/.gitignore b/.gitignore
index 2c30abf..d5c6496 100644
--- a/.gitignore
+++ b/.gitignore
@@ -201,3 +201,8 @@ FakesAssemblies/
 # Visual Studio 6 workspace options file
 *.opt
 .project
+
+__pycache__/
+*.py[cod]
+*$py.class
+test-reports/
diff --git a/Makefile b/Makefile
index 19c9068..1b3b814 100644
--- a/Makefile
+++ b/Makefile
@@ -29,3 +29,6 @@ iocBoot_DEPEND_DIRS += $(filter %App,$(DIRS))
 # Add any additional dependency rules here:
 
 include $(TOP)/configure/RULES_TOP
+
+ioctests:
+	.\system_tests\run_tests.bat
diff --git a/system_tests/__init__.py b/system_tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/system_tests/run_tests.bat b/system_tests/run_tests.bat
new file mode 100644
index 0000000..65ab1d6
--- /dev/null
+++ b/system_tests/run_tests.bat
@@ -0,0 +1,10 @@
+@echo off
+setlocal
+REM Run this directory's tests using the IOC Testing Framework
+
+call "%~dp0..\..\..\..\config_env.bat"
+
+REM Command line arguments always passed to the test script
+SET ARGS=--test_and_emulator %~dp0
+call %PYTHON3% -u "%EPICS_KIT_ROOT%\support\IocTestFramework\master\run_tests.py" %ARGS% %*
+IF %ERRORLEVEL% NEQ 0 EXIT /b %ERRORLEVEL%
diff --git a/system_tests/tests/__init__.py b/system_tests/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/system_tests/tests/mk3chopper.py b/system_tests/tests/mk3chopper.py
new file mode 100644
index 0000000..e1bb9ec
--- /dev/null
+++ b/system_tests/tests/mk3chopper.py
@@ -0,0 +1,50 @@
+import unittest
+
+from utils.channel_access import ChannelAccess
+from utils.ioc_launcher import IOCRegister, get_default_ioc_dir
+from utils.test_modes import TestModes
+from utils.testing import skip_if_devsim
+
+DEVICE_PREFIX = "MK3CHOPR_01"
+
+IOCS = [
+    {
+        "name": DEVICE_PREFIX,
+        "directory": get_default_ioc_dir("MK3CHOPR"),
+        "macros": {
+            "NUM_CHANNELS": 1
+        },
+    },
+]
+
+
+TEST_MODES = [TestModes.RECSIM, TestModes.DEVSIM]
+
+
+class Mk3chopperTests(unittest.TestCase):
+
+    # Remote access modes
+    LOCAL = "LOCAL"
+    REMOTE = "REMOTE"
+    COMP_MODE_PV = "COMP:MODE"
+
+    def setUp(self):
+        self._ioc = IOCRegister.get_running(DEVICE_PREFIX)
+        # Comp mode is on a slow 10s read. Needs a longer timeout than default
+        self.ca = ChannelAccess(device_prefix=DEVICE_PREFIX, default_timeout=30)
+        self.ca.assert_that_pv_exists(self.COMP_MODE_PV)
+
+    def test_WHEN_ioc_is_in_remote_mode_THEN_it_has_no_alarm(self):
+        # In RECSIM, switch to remote explicitly. DEVSIM can only have remote mode so no switch needed
+        if IOCRegister.uses_rec_sim:
+            # Bug in CA channel. Reports invalid alarm severity if you set enum directly
+            self.ca.set_pv_value("SIM:{}.VAL".format(self.COMP_MODE_PV), 1)
+        self.ca.assert_that_pv_is(self.COMP_MODE_PV, self.REMOTE)
+        self.ca.assert_that_pv_alarm_is(self.COMP_MODE_PV, ChannelAccess.Alarms.NONE)
+
+    @skip_if_devsim("Can't switch to local mode in DEVSIM")
+    def test_WHEN_ioc_is_in_local_mode_THEN_it_has_a_major_alarm(self):
+        # Bug in CA channel. Reports invalid alarm severity if you set enum directly
+        self.ca.set_pv_value("SIM:{}.VAL".format(self.COMP_MODE_PV), 0)
+        self.ca.assert_that_pv_is(self.COMP_MODE_PV, self.LOCAL)
+        self.ca.assert_that_pv_alarm_is(self.COMP_MODE_PV, ChannelAccess.Alarms.MAJOR)