diff --git a/netbox/dcim/tests/test_api.py b/netbox/dcim/tests/test_api.py
index 1c6f53693..4ab682d74 100644
--- a/netbox/dcim/tests/test_api.py
+++ b/netbox/dcim/tests/test_api.py
@@ -1442,6 +1442,8 @@ class InterfaceTest(Mixins.ComponentTraceMixin, APIViewTestCases.APIViewTestCase
                 'tagged_vlans': [vlans[0].pk, vlans[1].pk],
                 'untagged_vlan': vlans[2].pk,
                 'wireless_lans': [wireless_lans[0].pk, wireless_lans[1].pk],
+                'speed': 1000000,
+                'duplex': 'full'
             },
             {
                 'device': device.pk,
@@ -1454,6 +1456,8 @@ class InterfaceTest(Mixins.ComponentTraceMixin, APIViewTestCases.APIViewTestCase
                 'tagged_vlans': [vlans[0].pk, vlans[1].pk],
                 'untagged_vlan': vlans[2].pk,
                 'wireless_lans': [wireless_lans[0].pk, wireless_lans[1].pk],
+                'speed': 100000,
+                'duplex': 'half'
             },
             {
                 'device': device.pk,
diff --git a/netbox/dcim/tests/test_filtersets.py b/netbox/dcim/tests/test_filtersets.py
index 7b2e35009..de4806498 100644
--- a/netbox/dcim/tests/test_filtersets.py
+++ b/netbox/dcim/tests/test_filtersets.py
@@ -2383,10 +2383,10 @@ class InterfaceTestCase(TestCase, ChangeLoggedFilterSetTests):
         Device.objects.filter(pk=devices[1].pk).update(virtual_chassis=virtual_chassis, vc_position=2, vc_priority=2)
 
         interfaces = (
-            Interface(device=devices[0], name='Interface 1', label='A', type=InterfaceTypeChoices.TYPE_1GE_SFP, enabled=True, mgmt_only=True, mtu=100, mode=InterfaceModeChoices.MODE_ACCESS, mac_address='00-00-00-00-00-01', description='First', vrf=vrfs[0]),
-            Interface(device=devices[1], name='Interface 2', label='B', type=InterfaceTypeChoices.TYPE_1GE_GBIC, enabled=True, mgmt_only=True, mtu=200, mode=InterfaceModeChoices.MODE_TAGGED, mac_address='00-00-00-00-00-02', description='Second', vrf=vrfs[1]),
-            Interface(device=devices[2], name='Interface 3', label='C', type=InterfaceTypeChoices.TYPE_1GE_FIXED, enabled=False, mgmt_only=False, mtu=300, mode=InterfaceModeChoices.MODE_TAGGED_ALL, mac_address='00-00-00-00-00-03', description='Third', vrf=vrfs[2]),
-            Interface(device=devices[3], name='Interface 4', label='D', type=InterfaceTypeChoices.TYPE_OTHER, enabled=True, mgmt_only=True, tx_power=40),
+            Interface(device=devices[0], name='Interface 1', label='A', type=InterfaceTypeChoices.TYPE_1GE_SFP, enabled=True, mgmt_only=True, mtu=100, mode=InterfaceModeChoices.MODE_ACCESS, mac_address='00-00-00-00-00-01', description='First', vrf=vrfs[0], speed=1000000, duplex='half'),
+            Interface(device=devices[1], name='Interface 2', label='B', type=InterfaceTypeChoices.TYPE_1GE_GBIC, enabled=True, mgmt_only=True, mtu=200, mode=InterfaceModeChoices.MODE_TAGGED, mac_address='00-00-00-00-00-02', description='Second', vrf=vrfs[1], speed=1000000, duplex='full'),
+            Interface(device=devices[2], name='Interface 3', label='C', type=InterfaceTypeChoices.TYPE_1GE_FIXED, enabled=False, mgmt_only=False, mtu=300, mode=InterfaceModeChoices.MODE_TAGGED_ALL, mac_address='00-00-00-00-00-03', description='Third', vrf=vrfs[2], speed=100000, duplex='half'),
+            Interface(device=devices[3], name='Interface 4', label='D', type=InterfaceTypeChoices.TYPE_OTHER, enabled=True, mgmt_only=True, tx_power=40, speed=100000, duplex='full'),
             Interface(device=devices[3], name='Interface 5', label='E', type=InterfaceTypeChoices.TYPE_OTHER, enabled=True, mgmt_only=True, tx_power=40),
             Interface(device=devices[3], name='Interface 6', label='F', type=InterfaceTypeChoices.TYPE_OTHER, enabled=False, mgmt_only=False, tx_power=40),
             Interface(device=devices[3], name='Interface 7', type=InterfaceTypeChoices.TYPE_80211AC, rf_role=WirelessRoleChoices.ROLE_AP, rf_channel=WirelessChannelChoices.CHANNEL_24G_1, rf_channel_frequency=2412, rf_channel_width=22),
@@ -2423,6 +2423,14 @@ class InterfaceTestCase(TestCase, ChangeLoggedFilterSetTests):
         params = {'mtu': [100, 200]}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_speed(self):
+        params = {'speed': [1000000, 100000]}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
+
+    def test_duplex(self):
+        params = {'duplex': ['half', 'full']}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
+
     def test_mgmt_only(self):
         params = {'mgmt_only': 'true'}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 4)
diff --git a/netbox/dcim/tests/test_views.py b/netbox/dcim/tests/test_views.py
index 1b39285d4..4afa8a9f4 100644
--- a/netbox/dcim/tests/test_views.py
+++ b/netbox/dcim/tests/test_views.py
@@ -2124,6 +2124,8 @@ class InterfaceTestCase(ViewTestCases.DeviceComponentViewTestCase):
             'mac_address': EUI('01:02:03:04:05:06'),
             'wwn': EUI('01:02:03:04:05:06:07:08', version=64),
             'mtu': 65000,
+            'speed': 1000000,
+            'duplex': 'full',
             'mgmt_only': True,
             'description': 'A front port',
             'mode': InterfaceModeChoices.MODE_TAGGED,
@@ -2145,6 +2147,8 @@ class InterfaceTestCase(ViewTestCases.DeviceComponentViewTestCase):
             'mac_address': EUI('01:02:03:04:05:06'),
             'wwn': EUI('01:02:03:04:05:06:07:08', version=64),
             'mtu': 2000,
+            'speed': 100000,
+            'duplex': 'half',
             'mgmt_only': True,
             'description': 'A front port',
             'mode': InterfaceModeChoices.MODE_TAGGED,
@@ -2162,6 +2166,8 @@ class InterfaceTestCase(ViewTestCases.DeviceComponentViewTestCase):
             'mac_address': EUI('01:02:03:04:05:06'),
             'wwn': EUI('01:02:03:04:05:06:07:08', version=64),
             'mtu': 2000,
+            'speed': 1000000,
+            'duplex': 'full',
             'mgmt_only': True,
             'description': 'New description',
             'mode': InterfaceModeChoices.MODE_TAGGED,