diff --git a/nova/tests/unit/virt/libvirt/test_host.py b/nova/tests/unit/virt/libvirt/test_host.py
index 33f6b1ac90..a21abac471 100644
--- a/nova/tests/unit/virt/libvirt/test_host.py
+++ b/nova/tests/unit/virt/libvirt/test_host.py
@@ -16,6 +16,7 @@
 
 import os
 
+import ddt
 import eventlet
 from eventlet import greenthread
 from eventlet import tpool
@@ -1947,6 +1948,7 @@ class TestLibvirtSEV(test.NoDBTestCase):
         self.host = host.Host("qemu:///system")
 
 
+@ddt.ddt
 class TestLibvirtSEVUnsupported(TestLibvirtSEV):
     @mock.patch.object(os.path, 'exists', return_value=False)
     def test_kernel_parameter_missing(self, fake_exists):
@@ -1954,19 +1956,26 @@ class TestLibvirtSEVUnsupported(TestLibvirtSEV):
         fake_exists.assert_called_once_with(
             '/sys/module/kvm_amd/parameters/sev')
 
+    @ddt.data(
+        ('0\n', False),
+        ('N\n', False),
+        ('1\n', True),
+        ('Y\n', True),
+    )
+    @ddt.unpack
     @mock.patch.object(os.path, 'exists', return_value=True)
-    @mock.patch('builtins.open', mock.mock_open(read_data="0\n"))
-    def test_kernel_parameter_zero(self, fake_exists):
-        self.assertFalse(self.host._kernel_supports_amd_sev())
-        fake_exists.assert_called_once_with(
-            '/sys/module/kvm_amd/parameters/sev')
-
-    @mock.patch.object(os.path, 'exists', return_value=True)
-    @mock.patch('builtins.open', mock.mock_open(read_data="1\n"))
-    def test_kernel_parameter_one(self, fake_exists):
-        self.assertTrue(self.host._kernel_supports_amd_sev())
-        fake_exists.assert_called_once_with(
-            '/sys/module/kvm_amd/parameters/sev')
+    def test_kernel_parameter(
+        self, sev_param_value, expected_support, mock_exists
+    ):
+        with mock.patch(
+            'builtins.open', mock.mock_open(read_data=sev_param_value)
+        ):
+            self.assertIs(
+                expected_support,
+                self.host._kernel_supports_amd_sev()
+            )
+            mock_exists.assert_called_once_with(
+                '/sys/module/kvm_amd/parameters/sev')
 
     @mock.patch.object(os.path, 'exists', return_value=True)
     @mock.patch('builtins.open', mock.mock_open(read_data="1\n"))
diff --git a/nova/virt/libvirt/host.py b/nova/virt/libvirt/host.py
index e71d053b8e..98fd13ce6e 100644
--- a/nova/virt/libvirt/host.py
+++ b/nova/virt/libvirt/host.py
@@ -46,6 +46,7 @@ from oslo_log import log as logging
 from oslo_serialization import jsonutils
 from oslo_utils import excutils
 from oslo_utils import importutils
+from oslo_utils import strutils
 from oslo_utils import units
 from oslo_utils import versionutils
 
@@ -1699,9 +1700,9 @@ class Host(object):
             return False
 
         with open(SEV_KERNEL_PARAM_FILE) as f:
-            contents = f.read()
-            LOG.debug("%s contains [%s]", SEV_KERNEL_PARAM_FILE, contents)
-            return contents == "1\n"
+            content = f.read()
+            LOG.debug("%s contains [%s]", SEV_KERNEL_PARAM_FILE, content)
+            return strutils.bool_from_string(content)
 
     @property
     def supports_amd_sev(self) -> bool: