diff --git a/tests/test_datadir_ending.py b/tests/test_datadir_ending.py
new file mode 100644
index 0000000..1b5a7ff
--- /dev/null
+++ b/tests/test_datadir_ending.py
@@ -0,0 +1,138 @@
+import os
+import sys
+import threading
+import time
+from snmpsim.commands.responder import main as responder_main
+import pytest
+from pysnmp.hlapi.asyncio import *
+from pysnmp.hlapi.asyncio.slim import Slim
+from pysnmp import debug
+
+import asyncio
+
+TIME_OUT = 5
+PORT_NUMBER = 1611
+
+
+@pytest.fixture(autouse=True)
+def setup_args():
+    # Store the original sys.argv
+    original_argv = sys.argv
+    # Define your test arguments here
+    base_dir = os.path.dirname(os.path.abspath(__file__))
+    data_dir = os.path.join(base_dir, "data", "UPS")
+    test_args = [
+        "responder.py",
+        f"--data-dir={data_dir}/",
+        f"--agent-udpv4-endpoint=127.0.0.1:{PORT_NUMBER}",
+        f"--timeout={TIME_OUT}",
+    ]
+    # Set sys.argv to your test arguments
+    sys.argv = test_args
+    # This will run before the test function
+    yield
+    # Restore the original sys.argv after the test function has finished
+    sys.argv = original_argv
+
+
+# Fixture to run the application in a separate thread
+@pytest.fixture
+def run_app_in_background():
+    def target():
+        debug.setLogger(debug.Debug("all"))
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        try:
+            responder_main()
+        except KeyboardInterrupt:
+            print("Application interrupted.")
+        finally:
+            print("Application stopped.")
+            loop.close()
+
+    app_thread = threading.Thread(target=target)
+    app_thread.start()
+    # Allow some time for the application to initialize and run
+    time.sleep(1)
+    yield
+    # Simulate KeyboardInterrupt after the test is done
+    # This part may need to be adjusted based on how your application handles shutdown
+    app_thread.join(timeout=1)
+
+
+@pytest.mark.asyncio
+async def test_main_with_specific_args(run_app_in_background, capsys):
+    snmpEngine = SnmpEngine()
+    try:
+        # Create SNMP GET request v1
+        # with Slim(1) as slim:
+        #     errorIndication, errorStatus, errorIndex, varBinds = await slim.get(
+        #         "public",
+        #         "localhost",
+        #         PORT_NUMBER,
+        #         ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
+        #     )
+
+        #     assert errorIndication is None
+        #     assert errorStatus == 0
+        #     assert errorIndex == 0
+        #     assert len(varBinds) == 1
+        #     assert varBinds[0][0].prettyPrint() == "SNMPv2-MIB::sysDescr.0"
+        #     assert (
+        #         varBinds[0][1].prettyPrint()
+        #         == "APC Web/SNMP Management Card (MB:v4.1.0 PF:v6.7.2 PN:apc_hw05_aos_672.bin AF1:v6.7.2 AN1:apc_hw05_rpdu2g_672.bin MN:AP8932 HR:02 SN: 3F503A169043 MD:01/23/2019)"
+        #     )
+        #     assert isinstance(varBinds[0][1], OctetString)
+
+        # # # v2c
+        # with Slim() as slim:
+        #     errorIndication, errorStatus, errorIndex, varBinds = await slim.get(
+        #         "public",
+        #         "localhost",
+        #         PORT_NUMBER,
+        #         ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
+        #     )
+
+        #     assert errorIndication is None
+        #     assert errorStatus == 0
+        #     assert errorIndex == 0
+        #     assert len(varBinds) == 1
+        #     assert varBinds[0][0].prettyPrint() == "SNMPv2-MIB::sysDescr.0"
+        #     assert (
+        #         varBinds[0][1].prettyPrint()
+        #         == "APC Web/SNMP Management Card (MB:v4.1.0 PF:v6.7.2 PN:apc_hw05_aos_672.bin AF1:v6.7.2 AN1:apc_hw05_rpdu2g_672.bin MN:AP8932 HR:02 SN: 3F503A169043 MD:01/23/2019)"
+        #     )
+        #     assert isinstance(varBinds[0][1], OctetString)
+
+        # v3
+        authData = UsmUserData(
+            "simulator",
+            "auctoritas",
+            "privatus",
+            authProtocol=usmHMACMD5AuthProtocol,
+            privProtocol=usmDESPrivProtocol,
+        )
+        errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
+            snmpEngine,
+            authData,
+            UdpTransportTarget(("localhost", PORT_NUMBER), retries=0),
+            ContextData(contextName=OctetString("public").asOctets()),
+            ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
+        )
+
+        assert errorIndication is None
+        assert errorStatus == 0
+        assert len(varBinds) == 1
+        assert varBinds[0][0].prettyPrint() == "SNMPv2-MIB::sysDescr.0"
+        assert (
+            varBinds[0][1].prettyPrint()
+            == "APC Web/SNMP Management Card (MB:v4.1.0 PF:v6.7.2 PN:apc_hw05_aos_672.bin AF1:v6.7.2 AN1:apc_hw05_rpdu2g_672.bin MN:AP8932 HR:02 SN: 3F503A169043 MD:01/23/2019)"
+        )
+        assert isinstance(varBinds[0][1], OctetString)
+
+    finally:
+        if snmpEngine.transportDispatcher:
+            snmpEngine.transportDispatcher.closeDispatcher()
+
+        await asyncio.sleep(TIME_OUT)
+    # Rest of your test code...