diff --git a/tests/nexus/test_1_2_MATN_TC_1.cpp b/tests/nexus/test_1_2_MATN_TC_1.cpp
index 9a5c91ff1..c82c67c14 100644
--- a/tests/nexus/test_1_2_MATN_TC_1.cpp
+++ b/tests/nexus/test_1_2_MATN_TC_1.cpp
@@ -152,9 +152,6 @@ void TestMatnTc1(void)
 
     VerifyOrQuit(router.Get<Mle::Mle>().IsRouter());
 
-    host.mInfraIf.Init(host);
-    host.mInfraIf.AddAddress(host.mInfraIf.GetLinkLocalAddress());
-
     nexus.AdvanceTime(kStabilizationTime);
 
     // Add multicast variables to test info manually to ensure verify script sees them.
diff --git a/tests/nexus/test_1_2_MATN_TC_10.cpp b/tests/nexus/test_1_2_MATN_TC_10.cpp
index 74ed8c3ee..e6a579f9f 100644
--- a/tests/nexus/test_1_2_MATN_TC_10.cpp
+++ b/tests/nexus/test_1_2_MATN_TC_10.cpp
@@ -181,9 +181,6 @@ void TestMatnTc10(void)
         SuccessOrQuit(br2.Get<BackboneRouter::Local>().SetConfig(config));
     }
 
-    host.mInfraIf.Init(host);
-    host.mInfraIf.AddAddress(host.mInfraIf.GetLinkLocalAddress());
-
     {
         Ip6::Address hostGua;
         SuccessOrQuit(hostGua.FromString(kHostGua));
diff --git a/tests/nexus/test_1_2_MATN_TC_21.cpp b/tests/nexus/test_1_2_MATN_TC_21.cpp
index b1e170202..5e45ecfd7 100644
--- a/tests/nexus/test_1_2_MATN_TC_21.cpp
+++ b/tests/nexus/test_1_2_MATN_TC_21.cpp
@@ -204,9 +204,6 @@ void TestMatnTc21(void)
     SuccessOrQuit(br2.Get<BorderRouter::RoutingManager>().SetEnabled(true));
     br2.Get<BackboneRouter::Local>().SetEnabled(true);
 
-    host.mInfraIf.Init(host);
-    host.mInfraIf.AddAddress(host.mInfraIf.GetLinkLocalAddress());
-
     nexus.AdvanceTime(kStabilizationTime * 2);
 
     VerifyOrQuit(br1.Get<BackboneRouter::Local>().IsPrimary());
diff --git a/tests/nexus/test_1_2_MATN_TC_5.cpp b/tests/nexus/test_1_2_MATN_TC_5.cpp
index f1886e842..95fdde9ff 100644
--- a/tests/nexus/test_1_2_MATN_TC_5.cpp
+++ b/tests/nexus/test_1_2_MATN_TC_5.cpp
@@ -183,9 +183,6 @@ void TestMatnTc5(void)
     SuccessOrQuit(br2.Get<BorderRouter::RoutingManager>().SetEnabled(true));
     br2.Get<BackboneRouter::Local>().SetEnabled(true);
 
-    host.mInfraIf.Init(host);
-    host.mInfraIf.AddAddress(host.mInfraIf.GetLinkLocalAddress());
-
     nexus.AdvanceTime(kStabilizationTime * 2);
 
     VerifyOrQuit(br1.Get<BackboneRouter::Local>().IsPrimary());
diff --git a/tests/nexus/test_1_3_DBR_TC_1.cpp b/tests/nexus/test_1_3_DBR_TC_1.cpp
index 5cc4fc264..b89b55a6d 100644
--- a/tests/nexus/test_1_3_DBR_TC_1.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_1.cpp
@@ -116,8 +116,6 @@ void Test_1_3_DBR_TC_1(void)
      * - Pass Criteria: N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
-
     Log("---------------------------------------------------------------------------------------");
     Log("Step 2: Device: BR 1 (DUT) Description (DBR-1.1): Enable.");
 
diff --git a/tests/nexus/test_1_3_DBR_TC_10.cpp b/tests/nexus/test_1_3_DBR_TC_10.cpp
index 2979f22ea..8c908347a 100644
--- a/tests/nexus/test_1_3_DBR_TC_10.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_10.cpp
@@ -162,8 +162,6 @@ void Test_1_3_DBR_TC_10(const char *aJsonFileName)
      */
     Log("Step 0: Eth_1 configures Ethernet link with GUA_1 prefix and multicasts ND RA.");
 
-    eth1.mInfraIf.Init(eth1);
-
     {
         Ip6::Address eth1Gua;
         SuccessOrQuit(eth1Gua.FromString(kEth1Gua));
@@ -188,7 +186,6 @@ void Test_1_3_DBR_TC_10(const char *aJsonFileName)
      */
     Log("Step 1: BR_1 enables and configures OMR prefix and external route to GUA_1.");
 
-    br1.mInfraIf.Init(br1);
     br1.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
 
     br1.Get<BorderRouter::RoutingManager>().Init();
diff --git a/tests/nexus/test_1_3_DBR_TC_2.cpp b/tests/nexus/test_1_3_DBR_TC_2.cpp
index c74e8fca2..25cdeb5ff 100644
--- a/tests/nexus/test_1_3_DBR_TC_2.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_2.cpp
@@ -124,8 +124,6 @@ void Test_1_3_DBR_TC_2(void)
      * - Pass Criteria: N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
-
     br2.AllowList(br1);
 
     br2.Form();
diff --git a/tests/nexus/test_1_3_DBR_TC_6.cpp b/tests/nexus/test_1_3_DBR_TC_6.cpp
index d98abe084..b0bf9ac86 100644
--- a/tests/nexus/test_1_3_DBR_TC_6.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_6.cpp
@@ -127,8 +127,6 @@ void Test_1_3_DBR_TC_6(void)
     Log("Step 0: Device: Eth 1 Description (DBR-1.6): Harness configures Ethernet link with an on-link IPv6 GUA prefix "
         "GUA 1. Eth 1 is configured to multicast ND RAS.");
 
-    eth1.mInfraIf.Init(eth1);
-
     {
         Ip6::Address eth1Gua;
         SuccessOrQuit(eth1Gua.FromString(kEth1Gua));
@@ -147,7 +145,6 @@ void Test_1_3_DBR_TC_6(void)
     Log("Step 1: Device: Eth 1, BR 2 Description (DBR-1.6): Form topology. Wait for BR_2 to: 1. Register as border "
         "router in Thread Network Data with an OMR prefix OMR_1 2. Send multicast ND RAS");
 
-    br2.mInfraIf.Init(br2);
     br2.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
 
     br2.Get<BorderRouter::RoutingManager>().Init();
@@ -167,7 +164,6 @@ void Test_1_3_DBR_TC_6(void)
     Log("---------------------------------------------------------------------------------------");
     Log("Step 2: Device: BR 1 (DUT) Description (DBR-1.6): Enable: switch on.");
 
-    br1.mInfraIf.Init(br1);
     br1.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
 
     br1.AllowList(br2);
diff --git a/tests/nexus/test_1_3_DBR_TC_7A.cpp b/tests/nexus/test_1_3_DBR_TC_7A.cpp
index 0a73784d7..8c54a3d5a 100644
--- a/tests/nexus/test_1_3_DBR_TC_7A.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_7A.cpp
@@ -134,7 +134,6 @@ void Test_1_3_DBR_TC_7A(void)
      *   - N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
     static const char kGua1Prefix[] = "2001:db8:1::/64";
     Ip6::Prefix       gua1Prefix;
     SuccessOrQuit(gua1Prefix.FromString(kGua1Prefix));
@@ -203,7 +202,6 @@ void Test_1_3_DBR_TC_7A(void)
     br2.Get<NetworkData::Notifier>().HandleServerDataUpdated();
 
     br2.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
-    br2.mInfraIf.Init(br2);
     Ip6::Prefix pre1Prefix;
     SuccessOrQuit(pre1Prefix.FromString(kPre1Prefix));
     br2.mInfraIf.StartRouterAdvertisement(pre1Prefix);
diff --git a/tests/nexus/test_1_3_DBR_TC_7B.cpp b/tests/nexus/test_1_3_DBR_TC_7B.cpp
index 1f4ba0677..e68cbf1a7 100644
--- a/tests/nexus/test_1_3_DBR_TC_7B.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_7B.cpp
@@ -134,7 +134,6 @@ void Test_1_3_DBR_TC_7B(void)
      *   - N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
     static const char kGua1Prefix[] = "2001:db8:1::/64";
     Ip6::Prefix       gua1Prefix;
     SuccessOrQuit(gua1Prefix.FromString(kGua1Prefix));
@@ -203,7 +202,6 @@ void Test_1_3_DBR_TC_7B(void)
     br2.Get<NetworkData::Notifier>().HandleServerDataUpdated();
 
     br2.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
-    br2.mInfraIf.Init(br2);
     Ip6::Prefix pre1Prefix;
     SuccessOrQuit(pre1Prefix.FromString(kPre1Prefix));
     br2.mInfraIf.StartRouterAdvertisement(pre1Prefix);
diff --git a/tests/nexus/test_1_3_DBR_TC_7C.cpp b/tests/nexus/test_1_3_DBR_TC_7C.cpp
index 886c5d360..b99d21cad 100644
--- a/tests/nexus/test_1_3_DBR_TC_7C.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_7C.cpp
@@ -144,7 +144,6 @@ void Test_1_3_DBR_TC_7C(void)
      *   - N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
     Ip6::Prefix gua1Prefix;
     SuccessOrQuit(gua1Prefix.FromString(kGua1Prefix));
 
@@ -211,7 +210,6 @@ void Test_1_3_DBR_TC_7C(void)
     br2.Get<NetworkData::Notifier>().HandleServerDataUpdated();
 
     br2.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
-    br2.mInfraIf.Init(br2);
     Ip6::Prefix pre1Prefix;
     SuccessOrQuit(pre1Prefix.FromString(kPre1Prefix));
     br2.mInfraIf.StartRouterAdvertisement(pre1Prefix);
diff --git a/tests/nexus/test_1_3_DBR_TC_8.cpp b/tests/nexus/test_1_3_DBR_TC_8.cpp
index 4137cb201..c5c5e3ed7 100644
--- a/tests/nexus/test_1_3_DBR_TC_8.cpp
+++ b/tests/nexus/test_1_3_DBR_TC_8.cpp
@@ -250,7 +250,6 @@ void Test_1_3_DBR_TC_8(void)
      */
     Log("Step 0: Eth_1 configured with GUA_1.");
 
-    eth1.mInfraIf.Init(eth1);
     Ip6::Address eth1Gua;
     SuccessOrQuit(eth1Gua.FromString(kEth1GuaAddrStr));
     eth1.mInfraIf.AddAddress(eth1Gua);
diff --git a/tests/nexus/test_1_3_DPR_TC_1.cpp b/tests/nexus/test_1_3_DPR_TC_1.cpp
index da74c21d4..44ff96ac2 100644
--- a/tests/nexus/test_1_3_DPR_TC_1.cpp
+++ b/tests/nexus/test_1_3_DPR_TC_1.cpp
@@ -185,8 +185,6 @@ void Test_1_3_DPR_TC_1(const char *aJsonFileName)
      * - Pass Criteria: N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
-
     ed1.Join(br1, Node::kAsFed);
     nexus.AdvanceTime(kJoinNetworkTime);
     VerifyOrQuit(ed1.Get<Mle::Mle>().IsAttached());
diff --git a/tests/nexus/test_1_3_SRPC_TC_4.cpp b/tests/nexus/test_1_3_SRPC_TC_4.cpp
index 8f3f2b175..47d669c93 100644
--- a/tests/nexus/test_1_3_SRPC_TC_4.cpp
+++ b/tests/nexus/test_1_3_SRPC_TC_4.cpp
@@ -168,7 +168,6 @@ void Test_1_3_SRPC_TC_4(const char *aJsonFileName)
      *   - N/A
      */
 
-    eth1.mInfraIf.Init(eth1);
     br1.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
     br1.Get<BorderRouter::RoutingManager>().Init();
     SuccessOrQuit(br1.Get<BorderRouter::RoutingManager>().SetEnabled(true));
diff --git a/tests/nexus/test_1_3_SRPC_TC_5.cpp b/tests/nexus/test_1_3_SRPC_TC_5.cpp
index cb592e364..e13105cfd 100644
--- a/tests/nexus/test_1_3_SRPC_TC_5.cpp
+++ b/tests/nexus/test_1_3_SRPC_TC_5.cpp
@@ -326,8 +326,6 @@ void Test_1_3_SRPC_TC_5(const char *aJsonFileName)
     ed2.Join(br1, Node::kAsFed);
     nexus.AdvanceTime(kJoinNetworkTime);
 
-    eth1.mInfraIf.Init(eth1);
-
     Log("---------------------------------------------------------------------------------------");
     Log("Step 2: Device: BR 1 Description (SRPC-3.5): Automatically adds its SRP Server information");
 
diff --git a/tests/nexus/test_1_4_TREL_TC_6.cpp b/tests/nexus/test_1_4_TREL_TC_6.cpp
index 498d2fa21..f6e9add19 100644
--- a/tests/nexus/test_1_4_TREL_TC_6.cpp
+++ b/tests/nexus/test_1_4_TREL_TC_6.cpp
@@ -120,7 +120,6 @@ void Test_1_4_TREL_TC_6(void)
      */
     Log("Step 1: Form the topology");
 
-    eth1.mInfraIf.Init(eth1);
     Ip6::Prefix guaPrefix;
     SuccessOrQuit(guaPrefix.FromString(kGuaPrefixStr));
     eth1.mInfraIf.StartRouterAdvertisement(guaPrefix);
@@ -128,7 +127,6 @@ void Test_1_4_TREL_TC_6(void)
     br.Form();
     nexus.AdvanceTime(kFormNetworkTime);
 
-    br.mInfraIf.Init(br);
     br.Get<BorderRouter::InfraIf>().Init(kInfraIfIndex, true);
     br.Get<BorderRouter::RoutingManager>().Init();
     SuccessOrQuit(br.Get<BorderRouter::RoutingManager>().SetEnabled(true));
@@ -149,7 +147,6 @@ void Test_1_4_TREL_TC_6(void)
      */
     Log("Step 2: Eth_1 sends mDNS query PTR for _trel._udp.local");
 
-    eth1.mInfraIf.Init(eth1);
     SuccessOrQuit(eth1.Get<Dns::Multicast::Core>().SetEnabled(true, kInfraIfIndex));
     {
         Dns::Multicast::Core::Browser browser;