diff --git a/tests/nexus/verify_5_1_10.py b/tests/nexus/verify_5_1_10.py
index 14fe52e2d..58771990e 100644
--- a/tests/nexus/verify_5_1_10.py
+++ b/tests/nexus/verify_5_1_10.py
@@ -67,9 +67,18 @@ def verify(pv):
     # - Description: Setup the topology without the DUT. Verify all are sending MLE Advertisements.
     # - Pass Criteria: N/A
     print("Step 1: Leader, Router_1, Router_2")
-    pkts.copy().filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(LEADER).must_next()
-    pkts.copy().filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(ROUTER_1).must_next()
-    pkts.copy().filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(ROUTER_2).must_next()
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(LEADER).\
+        must_next()
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(ROUTER_1).\
+        must_next()
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(ROUTER_2).\
+        must_next()
 
     # Step 2: Test Harness
     # - Description: Set RSSI of Router_2 at the DUT to -85dBm (Link Quality 2).
@@ -107,8 +116,14 @@ def verify(pv):
     # - Pass Criteria: N/A
     print("Step 4: Router_1, Router_2")
     # Verify that we see parent responses from expected nodes.
-    pkts.copy().filter_mle_cmd(consts.MLE_PARENT_RESPONSE).filter_wpan_src64(ROUTER_1).must_next()
-    pkts.copy().filter_mle_cmd(consts.MLE_PARENT_RESPONSE).filter_wpan_src64(ROUTER_2).must_next()
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_PARENT_RESPONSE).\
+        filter_wpan_src64(ROUTER_1).\
+        must_next()
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_PARENT_RESPONSE).\
+        filter_wpan_src64(ROUTER_2).\
+        must_next()
 
     # Step 5: Router_3 (DUT)
     # - Description: DUT sends Child ID Request to Router_1.
diff --git a/tests/nexus/verify_5_1_2.py b/tests/nexus/verify_5_1_2.py
index 8ee67bc79..3993d6844 100644
--- a/tests/nexus/verify_5_1_2.py
+++ b/tests/nexus/verify_5_1_2.py
@@ -66,8 +66,12 @@ def verify(pv):
     # - Description: Verify topology is formed correctly
     # - Pass Criteria: N/A
     print("Step 1: Verify topology is formed correctly")
-    pkts.filter_wpan_src64(LEADER).filter_mle_cmd(consts.MLE_ADVERTISEMENT).must_next()
-    pkts.filter_wpan_src64(ROUTER_1).filter_mle_cmd(consts.MLE_ADVERTISEMENT).must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        must_next()
+    pkts.filter_wpan_src64(ROUTER_1).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        must_next()
 
     # Step 2: MED_1, SED_1
     # - Description: Harness silently powers-off both devices and waits for the keep-alive timeout to expire
diff --git a/tests/nexus/verify_5_1_3.py b/tests/nexus/verify_5_1_3.py
index f8cc23497..512258cf2 100644
--- a/tests/nexus/verify_5_1_3.py
+++ b/tests/nexus/verify_5_1_3.py
@@ -73,8 +73,10 @@ def verify(pv):
     # - Description: Verify topology is formed correctly
     # - Pass Criteria: N/A
     print("Step 2: Verifying topology formation.")
-    pkts.filter_wpan_src64(LEADER).filter_mle_cmd(
-        consts.MLE_ADVERTISEMENT).filter(lambda p: p.mle.tlv.leader_data.partition_id == P1_ID).must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter(lambda p: p.mle.tlv.leader_data.partition_id == P1_ID).\
+        must_next()
 
     # Step 3: Leader
     # - Description: Harness silently powers-off the Leader
diff --git a/tests/nexus/verify_5_1_4.py b/tests/nexus/verify_5_1_4.py
index fc519bc31..94e8f5beb 100644
--- a/tests/nexus/verify_5_1_4.py
+++ b/tests/nexus/verify_5_1_4.py
@@ -77,8 +77,10 @@ def verify(pv):
     # - Description: Verify topology is formed correctly
     # - Pass Criteria: N/A
     print("Step 3: Verifying topology formation.")
-    pkt = pkts.filter_wpan_src64(LEADER).filter_mle_cmd(
-        consts.MLE_ADVERTISEMENT).filter(lambda p: p.mle.tlv.leader_data.partition_id == P1_ID).must_next()
+    pkt = pkts.filter_wpan_src64(LEADER).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter(lambda p: p.mle.tlv.leader_data.partition_id == P1_ID).\
+        must_next()
     original_leader_data = pkt.mle.tlv.leader_data
 
     # Step 4: Leader
diff --git a/tests/nexus/verify_5_1_5.py b/tests/nexus/verify_5_1_5.py
index 679175dd6..9fc9c1a82 100644
--- a/tests/nexus/verify_5_1_5.py
+++ b/tests/nexus/verify_5_1_5.py
@@ -69,15 +69,15 @@ def verify(pv):
     print("Step 1: Verify topology is formed correctly")
 
     # First attach of Router_1
-    _pkt = pkts.filter_wpan_src64(ROUTER_1). \
-      filter_wpan_dst16(LEADER_RLOC16). \
-      filter_coap_request(consts.ADDR_SOL_URI). \
-      must_next()
+    _pkt = pkts.filter_wpan_src64(ROUTER_1).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_coap_request(consts.ADDR_SOL_URI).\
+        must_next()
 
-    _pkt_res = pkts.filter_wpan_src64(LEADER). \
-      filter_wpan_dst16(_pkt.wpan.src16). \
-      filter_coap_ack(consts.ADDR_SOL_URI). \
-      must_next()
+    _pkt_res = pkts.filter_wpan_src64(LEADER).\
+        filter_wpan_dst16(_pkt.wpan.src16).\
+        filter_coap_ack(consts.ADDR_SOL_URI).\
+        must_next()
 
     first_router_id = _pkt_res.coap.tlv.rloc16 >> ROUTER_ID_OFFSET
     print(f"Router_1 first Router ID: {first_router_id}")
@@ -107,23 +107,23 @@ def verify(pv):
     #     - Router Mask TLV
     print("Step 4: Leader (DUT) automatically attaches Router_1 and reassigns a different Router ID")
 
-    _pkt = pkts.filter_wpan_src64(ROUTER_1). \
-      filter_wpan_dst16(LEADER_RLOC16). \
-      filter_coap_request(consts.ADDR_SOL_URI). \
-      filter(lambda p: p.coap.tlv.rloc16 >> ROUTER_ID_OFFSET == first_router_id). \
-      must_next()
+    _pkt = pkts.filter_wpan_src64(ROUTER_1).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_coap_request(consts.ADDR_SOL_URI).\
+        filter(lambda p: p.coap.tlv.rloc16 >> ROUTER_ID_OFFSET == first_router_id).\
+        must_next()
 
-    _pkt_res = pkts.filter_wpan_src64(LEADER). \
-      filter_wpan_dst16(_pkt.wpan.src16). \
-      filter_coap_ack(consts.ADDR_SOL_URI). \
-      filter(lambda p: {
-        consts.NL_STATUS_TLV,
-        consts.NL_RLOC16_TLV,
-        consts.NL_ROUTER_MASK_TLV
-      } <= set(p.coap.tlv.type) and
-        p.coap.code == consts.COAP_CODE_ACK and
-        p.coap.tlv.status == 0). \
-      must_next()
+    _pkt_res = pkts.filter_wpan_src64(LEADER).\
+        filter_wpan_dst16(_pkt.wpan.src16).\
+        filter_coap_ack(consts.ADDR_SOL_URI).\
+        filter(lambda p: {
+            consts.NL_STATUS_TLV,
+            consts.NL_RLOC16_TLV,
+            consts.NL_ROUTER_MASK_TLV
+        } <= set(p.coap.tlv.type) and
+            p.coap.code == consts.COAP_CODE_ACK and
+            p.coap.tlv.status == 0).\
+        must_next()
 
     second_router_id = _pkt_res.coap.tlv.rloc16 >> ROUTER_ID_OFFSET
     print(f"Router_1 second Router ID: {second_router_id}")
@@ -153,23 +153,23 @@ def verify(pv):
     #     - Router Mask TLV
     print("Step 7: Leader (DUT) automatically attaches Router_1 and reassigns the requested Router ID")
 
-    _pkt = pkts.filter_wpan_src64(ROUTER_1). \
-      filter_wpan_dst16(LEADER_RLOC16). \
-      filter_coap_request(consts.ADDR_SOL_URI). \
-      filter(lambda p: p.coap.tlv.rloc16 >> ROUTER_ID_OFFSET == second_router_id). \
-      must_next()
+    _pkt = pkts.filter_wpan_src64(ROUTER_1).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_coap_request(consts.ADDR_SOL_URI).\
+        filter(lambda p: p.coap.tlv.rloc16 >> ROUTER_ID_OFFSET == second_router_id).\
+        must_next()
 
-    _pkt_res = pkts.filter_wpan_src64(LEADER). \
-      filter_wpan_dst16(_pkt.wpan.src16). \
-      filter_coap_ack(consts.ADDR_SOL_URI). \
-      filter(lambda p: {
-        consts.NL_STATUS_TLV,
-        consts.NL_RLOC16_TLV,
-        consts.NL_ROUTER_MASK_TLV
-      } <= set(p.coap.tlv.type) and
-        p.coap.code == consts.COAP_CODE_ACK and
-        p.coap.tlv.status == 0). \
-      must_next()
+    _pkt_res = pkts.filter_wpan_src64(LEADER).\
+        filter_wpan_dst16(_pkt.wpan.src16).\
+        filter_coap_ack(consts.ADDR_SOL_URI).\
+        filter(lambda p: {
+            consts.NL_STATUS_TLV,
+            consts.NL_RLOC16_TLV,
+            consts.NL_ROUTER_MASK_TLV
+        } <= set(p.coap.tlv.type) and
+            p.coap.code == consts.COAP_CODE_ACK and
+            p.coap.tlv.status == 0).\
+        must_next()
 
     third_router_id = _pkt_res.coap.tlv.rloc16 >> ROUTER_ID_OFFSET
     print(f"Router_1 third Router ID: {third_router_id}")
diff --git a/tests/nexus/verify_5_1_6.py b/tests/nexus/verify_5_1_6.py
index e964fd1b9..96962a0b5 100755
--- a/tests/nexus/verify_5_1_6.py
+++ b/tests/nexus/verify_5_1_6.py
@@ -66,7 +66,8 @@ def verify(pv):
     # - Pass Criteria: N/A
     print("Step 0: Verify topology is formed correctly")
     pv.verify_attached('ROUTER')
-    pkts.copy().filter_wpan_src64(LEADER).\
+    pkts.copy().\
+        filter_wpan_src64(LEADER).\
         filter_coap_ack(consts.ADDR_SOL_URI).\
         filter(lambda p: {
                           consts.NL_STATUS_TLV,
diff --git a/tests/nexus/verify_5_2_6.py b/tests/nexus/verify_5_2_6.py
index 2f17a1374..47efd4154 100644
--- a/tests/nexus/verify_5_2_6.py
+++ b/tests/nexus/verify_5_2_6.py
@@ -73,8 +73,8 @@ def verify(pv):
     # - Pass Criteria: N/A
     print("Step 2: Router_24 - Harness causes Router_24 to attach to the network")
     pkts.filter_wpan_src64(ROUTER_24).\
-      filter_mle_cmd(consts.MLE_PARENT_REQUEST).\
-      must_next()
+        filter_mle_cmd(consts.MLE_PARENT_REQUEST).\
+        must_next()
 
     # Step 3: Router_1 (DUT)
     # - Description: Allow enough time for the DUT to get Network Data Updates and resign its Router ID.
@@ -91,41 +91,41 @@ def verify(pv):
 
     # Verify DUT sends Parent Request
     pkts.filter_wpan_src64(ROUTER_1).\
-      filter_mle_cmd(consts.MLE_PARENT_REQUEST).\
-      must_next()
+        filter_mle_cmd(consts.MLE_PARENT_REQUEST).\
+        must_next()
 
     # Verify DUT sends Child ID Request
     pkts.filter_wpan_src64(ROUTER_1).\
-      filter_mle_cmd(consts.MLE_CHILD_ID_REQUEST).\
-      must_next()
+        filter_mle_cmd(consts.MLE_CHILD_ID_REQUEST).\
+        must_next()
 
     # Verify DUT sends Address Release with required TLVs
     pkts.filter_wpan_src64(ROUTER_1).\
-      filter_coap_request(consts.ADDR_REL_URI).\
-      filter(lambda p: {
-        consts.NL_MAC_EXTENDED_ADDRESS_TLV,
-        consts.NL_RLOC16_TLV
-      } <= {int(t, 16) if isinstance(t, str) else t for t in p.coap.tlv.type}).\
-      must_next()
+        filter_coap_request(consts.ADDR_REL_URI).\
+        filter(lambda p: {
+            consts.NL_MAC_EXTENDED_ADDRESS_TLV,
+            consts.NL_RLOC16_TLV
+        } <= {int(t, 16) if isinstance(t, str) else t for t in p.coap.tlv.type}).\
+        must_next()
 
     # Step 4: Leader
     # - Description: Receives Address Release message and automatically sends a 2.04 Changed CoAP response.
     # - Pass Criteria: N/A
     print("Step 4: Leader - Receives Address Release message and automatically sends a 2.04 Changed CoAP response.")
     pkts.filter_wpan_src64(LEADER).\
-      filter_coap_ack(consts.ADDR_REL_URI).\
-      filter(lambda p: p.coap.code == consts.COAP_CODE_ACK).\
-      must_next()
+        filter_coap_ack(consts.ADDR_REL_URI).\
+        filter(lambda p: p.coap.code == consts.COAP_CODE_ACK).\
+        must_next()
 
     # Step 5: Leader
     # - Description: Harness verifies connectivity by instructing the device to send an ICMPv6 Echo Request to the DUT
     # - Pass Criteria: The DUT MUST respond with an ICMPv6 Echo Reply
     print("Step 5: Leader - Harness verifies connectivity by instructing the device to send an ICMPv6 Echo Request")
     _pkt = pkts.filter_ping_request().\
-      filter_wpan_src64(LEADER).\
-      must_next()
+        filter_wpan_src64(LEADER).\
+        must_next()
     pkts.filter_ping_reply(identifier=_pkt.icmpv6.echo.identifier).\
-      must_next()
+        must_next()
 
 
 if __name__ == '__main__':
diff --git a/tests/nexus/verify_5_3_2.py b/tests/nexus/verify_5_3_2.py
index dcdd4a522..3f03e5ebb 100644
--- a/tests/nexus/verify_5_3_2.py
+++ b/tests/nexus/verify_5_3_2.py
@@ -78,35 +78,39 @@ def verify(pv):
     # - Description: Build the topology as described and begin the wireless sniffer.
     # - Pass Criteria: N/A
     print("Step 1: All")
-    pkts.filter_wpan_src64(LEADER).filter_mle_cmd(consts.MLE_ADVERTISEMENT).must_next()
-    pkts.filter_wpan_src64(DUT).filter_mle_cmd(consts.MLE_ADVERTISEMENT).must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        must_next()
 
     # Step 2: Leader
     # - Description: Harness instructs the device to send an ICMPv6 Echo Request to the DUT ML-EID.
     # - Pass Criteria: The DUT MUST respond with an ICMPv6 Echo Reply.
     print("Step 2: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(DUT_MLEID) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(DUT_MLEID).\
+        filter_ping_request(identifier=ECHO_ID).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
 
     # Step 3: Leader
     # - Description: Harness instructs the device to send a fragmented ICMPv6 Echo Request to the DUT ML-EID.
     # - Pass Criteria: The DUT MUST respond with an ICMPv6 Echo Reply.
     print("Step 3: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(DUT_MLEID) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(DUT_MLEID).\
+        filter_ping_request(identifier=ECHO_ID).\
+        filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
 
     # Step 4: Leader
     # - Description: Harness instructs the device to send an ICMPv6 Echo Request to the Realm-Local All-Nodes
@@ -115,18 +119,19 @@ def verify(pv):
     #   - The DUT MUST respond with an ICMPv6 Echo Reply.
     #   - The DUT MUST NOT forward the ICMPv6 Echo Request to SED_1.
     print("Step 4: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
-    pkts.copy().filter_wpan_src64(DUT) \
-        .filter_wpan_dst64(SED_1) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS) \
-        .must_not_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS).\
+        filter_ping_request(identifier=ECHO_ID).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
+    pkts.copy().\
+        filter_wpan_src64(DUT).\
+        filter_wpan_dst64(SED_1).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS).\
+        must_not_next()
 
     # Step 5: Leader
     # - Description: Harness instructs the device to send a fragmented ICMPv6 Echo Request to the Realm-Local
@@ -135,19 +140,20 @@ def verify(pv):
     #   - The DUT MUST respond with an ICMPv6 Echo Reply.
     #   - The DUT MUST NOT forward the ICMPv6 Echo Request to SED_1.
     print("Step 5: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
-    pkts.copy().filter_wpan_src64(DUT) \
-        .filter_wpan_dst64(SED_1) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS) \
-        .must_not_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS).\
+        filter_ping_request(identifier=ECHO_ID).\
+        filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
+    pkts.copy().\
+        filter_wpan_src64(DUT).\
+        filter_wpan_dst64(SED_1).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_NODES_ADDRESS).\
+        must_not_next()
 
     # Step 6: Leader
     # - Description: Harness instructs the device to send an ICMPv6 Echo Request to the Realm-Local All-Routers
@@ -156,18 +162,19 @@ def verify(pv):
     #   - The DUT MUST respond with an ICMPv6 Echo Reply.
     #   - The DUT MUST NOT forward the ICMPv6 Echo Request to SED_1.
     print("Step 6: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
-    pkts.copy().filter_wpan_src64(DUT) \
-        .filter_wpan_dst64(SED_1) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS) \
-        .must_not_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS).\
+        filter_ping_request(identifier=ECHO_ID).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
+    pkts.copy().\
+        filter_wpan_src64(DUT).\
+        filter_wpan_dst64(SED_1).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS).\
+        must_not_next()
 
     # Step 7: Leader
     # - Description: Harness instructs the device to send a fragmented ICMPv6 Echo Request to the Realm-Local
@@ -176,19 +183,20 @@ def verify(pv):
     #   - The DUT MUST respond with an ICMPv6 Echo Reply.
     #   - The DUT MUST NOT forward the ICMPv6 Echo Request to SED_1.
     print("Step 7: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')) \
-        .must_next()
-    pkts.filter_wpan_src64(DUT) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
-    pkts.copy().filter_wpan_src64(DUT) \
-        .filter_wpan_dst64(SED_1) \
-        .filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS) \
-        .must_not_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS).\
+        filter_ping_request(identifier=ECHO_ID).\
+        filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')).\
+        must_next()
+    pkts.filter_wpan_src64(DUT).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
+    pkts.copy().\
+        filter_wpan_src64(DUT).\
+        filter_wpan_dst64(SED_1).\
+        filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS).\
+        must_not_next()
 
     # Step 8: Leader
     # - Description: Harness instructs the device to send a Fragmented ICMPv6 Echo Request to the Realm-Local All
@@ -203,24 +211,24 @@ def verify(pv):
     #     - group ID set to 1
     #   - The DUT MUST use IEEE 802.15.4 indirect transmissions to forward packet to SED_1.
     print("Step 8: Leader")
-    pkts.filter_wpan_src64(LEADER) \
-        .filter_ipv6_dst(realm_local_all_thread_nodes) \
-        .filter_ping_request(identifier=ECHO_ID) \
-        .filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')) \
-        .must_next()
-    pkts.filter(lambda p: p.wpan.src16 == SED_1_RLOC16) \
-        .filter_wpan_cmd(consts.WPAN_DATA_REQUEST) \
-        .must_next()
+    pkts.filter_wpan_src64(LEADER).\
+        filter_ipv6_dst(realm_local_all_thread_nodes).\
+        filter_ping_request(identifier=ECHO_ID).\
+        filter(lambda p: hasattr(p, 'lowpan') and hasattr(p.lowpan, 'fragment')).\
+        must_next()
+    pkts.filter(lambda p: p.wpan.src16 == SED_1_RLOC16).\
+        filter_wpan_cmd(consts.WPAN_DATA_REQUEST).\
+        must_next()
     # DUT forwards the packet to SED_1 responding to the Data Request.
     # We use RLOC16 filters because decryption might fail for these packets.
-    pkts.filter(lambda p: p.wpan.src16 == DUT_RLOC16 and p.wpan.dst16 == SED_1_RLOC16) \
-        .must_next()
+    pkts.filter(lambda p: p.wpan.src16 == DUT_RLOC16 and p.wpan.dst16 == SED_1_RLOC16).\
+        must_next()
     # SED_1 sends Echo Reply (unicast to Leader).
     # Unicast packets are usually mapped and decrypted correctly if mapping was learned.
-    pkts.filter(lambda p: p.wpan.src16 == SED_1_RLOC16) \
-        .filter_ipv6_dst(LEADER_MLEID) \
-        .filter_ping_reply(identifier=ECHO_ID) \
-        .must_next()
+    pkts.filter(lambda p: p.wpan.src16 == SED_1_RLOC16).\
+        filter_ipv6_dst(LEADER_MLEID).\
+        filter_ping_reply(identifier=ECHO_ID).\
+        must_next()
 
 
 if __name__ == '__main__':
diff --git a/tests/nexus/verify_5_3_4.py b/tests/nexus/verify_5_3_4.py
index 62c77e1e2..21af9e8e8 100644
--- a/tests/nexus/verify_5_3_4.py
+++ b/tests/nexus/verify_5_3_4.py
@@ -86,13 +86,15 @@ def verify(pv):
     for mleid in MEDS_MLEID:
         # For each MED, verify a ping request exists. A fresh copy of `pkts` is used
         # to ensure the search is independent of the order of packets for other MEDs.
-        pkts.copy().filter_ping_request().\
+        pkts.copy().\
+            filter_ping_request().\
             filter_wpan_src64(SED_1).\
             filter_ipv6_dst(mleid).\
             must_next()
 
         # Verify a corresponding address query is sent by the DUT.
-        pkts.copy().filter_wpan_src64(DUT).\
+        pkts.copy().\
+            filter_wpan_src64(DUT).\
             filter_ipv6_dst(consts.REALM_LOCAL_ALL_ROUTERS_ADDRESS).\
             filter_coap_request(consts.ADDR_QRY_URI).\
             filter(lambda p: p.coap.tlv.target_eid == str(mleid)).\
@@ -146,7 +148,8 @@ def verify(pv):
             must_next()
 
     # Verify NO Address Query was sent by DUT starting from the start of Step 4
-    pkts.range(checkpoint_step4).filter_wpan_src64(DUT).\
+    pkts.range(checkpoint_step4).\
+        filter_wpan_src64(DUT).\
         filter_coap_request(consts.ADDR_QRY_URI).\
         must_not_next()
 
diff --git a/tests/nexus/verify_5_3_5.py b/tests/nexus/verify_5_3_5.py
index 14a2fbe02..1ea01d6cd 100644
--- a/tests/nexus/verify_5_3_5.py
+++ b/tests/nexus/verify_5_3_5.py
@@ -87,11 +87,16 @@ def verify(pv):
     #   - The hopsLft field of the 6LoWPAN Mesh Header MUST be greater than the route cost to the destination.
     print("Step 3: Router_3")
     # Router_3 -> DUT
-    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).filter_wpan_dst16(DUT_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).must_next()
+    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).\
+        filter_wpan_dst16(DUT_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        must_next()
     # DUT -> Leader
-    p2 = pkts.filter_wpan_src16(DUT_RLOC16).filter_wpan_dst16(LEADER_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 1).must_next()
+    p2 = pkts.filter_wpan_src16(DUT_RLOC16).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 1).\
+        must_next()
     assert get_hops(p2) == get_hops(p1) - 1, f'Hops left not decremented correctly: {get_hops(p1)} -> {get_hops(p2)}'
 
     # Step 4: Harness
@@ -106,15 +111,23 @@ def verify(pv):
     #   - The hopsLft field of the 6LoWPAN Mesh Header MUST be greater than the route cost to the destination.
     print("Step 5: Router_3")
     # Router_3 -> DUT
-    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).filter_wpan_dst16(DUT_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).must_next()
+    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).\
+        filter_wpan_dst16(DUT_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        must_next()
     # DUT -> Router_2
-    p2 = pkts.filter_wpan_src16(DUT_RLOC16).filter_wpan_dst16(ROUTER_2_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 2).must_next()
+    p2 = pkts.filter_wpan_src16(DUT_RLOC16).\
+        filter_wpan_dst16(ROUTER_2_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 2).\
+        must_next()
     assert get_hops(p2) == get_hops(p1) - 1, f'Hops left not decremented correctly: {get_hops(p1)} -> {get_hops(p2)}'
     # Router_2 -> Leader
-    p3 = pkts.filter_wpan_src16(ROUTER_2_RLOC16).filter_wpan_dst16(LEADER_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 1).must_next()
+    p3 = pkts.filter_wpan_src16(ROUTER_2_RLOC16).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 1).\
+        must_next()
     assert get_hops(p3) == get_hops(p2) - 1, f'Hops left not decremented correctly: {get_hops(p2)} -> {get_hops(p3)}'
 
     # Step 6: Harness
@@ -130,11 +143,16 @@ def verify(pv):
     #   - The hopsLft field of the 6LoWPAN Mesh Header MUST be greater than the route cost to the destination.
     print("Step 7: Router_3")
     # Router_3 -> DUT
-    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).filter_wpan_dst16(DUT_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).must_next()
+    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).\
+        filter_wpan_dst16(DUT_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        must_next()
     # DUT -> Leader
-    p2 = pkts.filter_wpan_src16(DUT_RLOC16).filter_wpan_dst16(LEADER_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 2).must_next()
+    p2 = pkts.filter_wpan_src16(DUT_RLOC16).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 2).\
+        must_next()
     assert get_hops(p2) == get_hops(p1) - 1, f'Hops left not decremented correctly: {get_hops(p1)} -> {get_hops(p2)}'
 
     # Step 8: Harness
@@ -149,15 +167,23 @@ def verify(pv):
     #   - The hopsLft field of the 6LoWPAN Mesh Header MUST be greater than the route cost to the destination.
     print("Step 9: Router_3")
     # Router_3 -> DUT
-    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).filter_wpan_dst16(DUT_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).must_next()
+    p1 = pkts.filter_wpan_src16(ROUTER_3_RLOC16).\
+        filter_wpan_dst16(DUT_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        must_next()
     # DUT -> Router_2
-    p2 = pkts.filter_wpan_src16(DUT_RLOC16).filter_wpan_dst16(ROUTER_2_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 2).must_next()
+    p2 = pkts.filter_wpan_src16(DUT_RLOC16).\
+        filter_wpan_dst16(ROUTER_2_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 2).\
+        must_next()
     assert get_hops(p2) == get_hops(p1) - 1, f'Hops left not decremented correctly: {get_hops(p1)} -> {get_hops(p2)}'
     # Router_2 -> Leader
-    p3 = pkts.filter_wpan_src16(ROUTER_2_RLOC16).filter_wpan_dst16(LEADER_RLOC16).filter_ping_request(
-        identifier=ECHO_IDENTIFIER).filter(lambda p: p.lowpan.mesh.hops > 1).must_next()
+    p3 = pkts.filter_wpan_src16(ROUTER_2_RLOC16).\
+        filter_wpan_dst16(LEADER_RLOC16).\
+        filter_ping_request(identifier=ECHO_IDENTIFIER).\
+        filter(lambda p: p.lowpan.mesh.hops > 1).\
+        must_next()
     assert get_hops(p3) == get_hops(p2) - 1, f'Hops left not decremented correctly: {get_hops(p2)} -> {get_hops(p3)}'
 
 
diff --git a/tests/nexus/verify_5_3_6.py b/tests/nexus/verify_5_3_6.py
index 041c0b788..ef9d15cd0 100644
--- a/tests/nexus/verify_5_3_6.py
+++ b/tests/nexus/verify_5_3_6.py
@@ -66,10 +66,16 @@ def verify(pv):
     #   - Description: Ensure topology is formed correctly.
     #   - Pass Criteria: N/A
     print("Step 1: All")
-    pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(LEADER).must_next()
-    router1_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(ROUTER_1).must_next()
+    pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(LEADER).\
+        must_next()
+    router1_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(ROUTER_1).\
+        must_next()
     router1_id = (router1_pkt.mle.tlv.source_addr >> 10)
-    router2_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(ROUTER_2).must_next()
+    router2_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(ROUTER_2).\
+        must_next()
     router2_id = (router2_pkt.mle.tlv.source_addr >> 10)
 
     # Step 2: Router_2
@@ -108,7 +114,9 @@ def verify(pv):
     #     - The DUT MUST reset the MLE Advertisement trickle timer and send an Advertisement.
     print("Step 5: Router_2")
     # Verify Router 2 becomes router again (sends advertisement) and get its new ID
-    router2_rejoin_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).filter_wpan_src64(ROUTER_2).must_next()
+    router2_rejoin_pkt = pkts.filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+        filter_wpan_src64(ROUTER_2).\
+        must_next()
     router2_id_reattached = (router2_rejoin_pkt.mle.tlv.source_addr >> 10)
 
     # Verify Leader sends advertisement after Router 2 re-joins
diff --git a/tests/nexus/verify_5_3_7.py b/tests/nexus/verify_5_3_7.py
index b2012dbd6..46df38d08 100644
--- a/tests/nexus/verify_5_3_7.py
+++ b/tests/nexus/verify_5_3_7.py
@@ -79,7 +79,8 @@ def verify(pv):
     #     - Route64 TLV
     #     - Source Address TLV
     print("Step 2: Leader (DUT)")
-    pkts.copy().filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
+    pkts.copy().\
+        filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
         filter_wpan_src64(LEADER).\
         filter_LLANMA().\
         filter(lambda p: {
@@ -111,7 +112,8 @@ def verify(pv):
     #     - CoAP Payload:
     #       - Target EID TLV
     print("Step 5: MED_2")
-    pkts.copy().filter_wpan_src64(LEADER).\
+    pkts.copy().\
+        filter_wpan_src64(LEADER).\
         filter_RLARMA().\
         filter_coap_request(consts.ADDR_QRY_URI).\
         filter(lambda p: p.coap.tlv.target_eid == '2001::1').\
@@ -121,8 +123,14 @@ def verify(pv):
     # - Description: Automatically respond with Address Notification message with matching Target TLVs.
     # - Pass Criteria: N/A
     print("Step 6: Router_1, Router_2")
-    pkts.copy().filter_wpan_src64(ROUTER_1).filter_coap_request(consts.ADDR_NTF_URI).must_next()
-    pkts.copy().filter_wpan_src64(ROUTER_2).filter_coap_request(consts.ADDR_NTF_URI).must_next()
+    pkts.copy().\
+        filter_wpan_src64(ROUTER_1).\
+        filter_coap_request(consts.ADDR_NTF_URI).\
+        must_next()
+    pkts.copy().\
+        filter_wpan_src64(ROUTER_2).\
+        filter_coap_request(consts.ADDR_NTF_URI).\
+        must_next()
 
     # Step 7: Leader (DUT)
     # - Description: Automatically sends a Multicast Address Error Notification.
@@ -136,7 +144,8 @@ def verify(pv):
     #       - ML-EID TLV
     #   - The IPv6 Source address MUST be the RLOC of the originator,,,
     print("Step 7: Leader (DUT)")
-    pkts.copy().filter_wpan_src64(LEADER).\
+    pkts.copy().\
+        filter_wpan_src64(LEADER).\
         filter_RLARMA().\
         filter_coap_request(consts.ADDR_ERR_URI).\
         filter(lambda p: p.coap.tlv.target_eid == '2001::1' and p.ipv6.src == pv.vars['LEADER_RLOC']).\
diff --git a/tests/nexus/verify_5_3_8.py b/tests/nexus/verify_5_3_8.py
index 011bf919d..8a158246c 100644
--- a/tests/nexus/verify_5_3_8.py
+++ b/tests/nexus/verify_5_3_8.py
@@ -158,7 +158,8 @@ def _verify_echo(pv, src_ext, dst_ext, target_ip):
     end_index = pkts.index
 
     # Verify no Address Query from DUT (Leader) for the target IP in this range
-    pkts.range(start_index, end_index).filter_wpan_src64(pv.vars['LEADER']).\
+    pkts.range(start_index, end_index).\
+        filter_wpan_src64(pv.vars['LEADER']).\
         filter(lambda p: p.ipv6.src == DUT_RLOC).\
         filter_coap_request(consts.ADDR_QRY_URI).\
         filter(lambda p: Ipv6Addr(p.coap.tlv.target_eid) == target_ip_addr or\