diff --git a/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none.py b/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none.py
new file mode 100644
index 000000000..d9adfb013
--- /dev/null
+++ b/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none.py
@@ -0,0 +1,26 @@
+import pytest
+from pysnmp.hlapi.asyncio import *
+
+@pytest.mark.asyncio
+async def test_usm_sha_none():
+    snmpEngine = SnmpEngine()
+    authData = UsmUserData(
+        "usr-sha-none",
+        "authkey1",
+        authProtocol=usmHMACSHAAuthProtocol,
+    )
+    errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
+        snmpEngine,
+        authData,
+        UdpTransportTarget(("demo.pysnmp.com", 161), retries=0),
+        ContextData(),
+        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"
+    isinstance(varBinds[0][1], OctetString)
+
+    snmpEngine.transportDispatcher.closeDispatcher()
diff --git a/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none_wrong_user.py b/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none_wrong_user.py
new file mode 100644
index 000000000..4eaf84e4d
--- /dev/null
+++ b/tests/hlapi/asyncio/manager/cmdgen/test_usm_sha_none_wrong_user.py
@@ -0,0 +1,24 @@
+import pytest
+from pysnmp.hlapi.asyncio import *
+from pysnmp.proto.errind import UnknownUserName
+
+@pytest.mark.asyncio
+async def test_usm_sha_none_wrong_user():
+    snmpEngine = SnmpEngine()
+    authData = UsmUserData(
+        "usr-sha-none-not-exist",
+        "authkey1",
+        authProtocol=usmHMACSHAAuthProtocol,
+    )
+    errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
+        snmpEngine,
+        authData,
+        UdpTransportTarget(("demo.pysnmp.com", 161), retries=0),
+        ContextData(),
+        ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
+    )
+
+    assert isinstance(errorIndication, UnknownUserName)
+    assert str(errorIndication) == 'Unknown USM user'
+
+    snmpEngine.transportDispatcher.closeDispatcher()