diff --git a/backends/bmv2/bmv2stf.py b/backends/bmv2/bmv2stf.py
index 473213cb69d..8b9eedde492 100755
--- a/backends/bmv2/bmv2stf.py
+++ b/backends/bmv2/bmv2stf.py
@@ -1,17 +1,7 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 # Runs the BMv2 behavioral model simulator with input from an stf file
 
@@ -907,7 +897,7 @@ def checkOutputs(self) -> int:
                 # We only care that the packet was received on this particular port.
                 if not expected_pkt:
                     continue
-                cmp_result = testutils.compare_pkt(expected_pkt, packets[idx])
+                cmp_result = testutils.compare_pkt(expected_pkt, packets[idx].build())
                 if cmp_result != testutils.SUCCESS:
                     testutils.log.error("Packet %s on port %s differs", idx, interface)
                     return cmp_result
diff --git a/backends/bmv2/run-bmv2-test.py b/backends/bmv2/run-bmv2-test.py
index 803dae4324d..83c455487a2 100755
--- a/backends/bmv2/run-bmv2-test.py
+++ b/backends/bmv2/run-bmv2-test.py
@@ -1,17 +1,7 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 # Runs the compiler on a sample P4 program generating code for the BMv2
 # behavioral model simulator
diff --git a/backends/ebpf/targets/bcc_target.py b/backends/ebpf/targets/bcc_target.py
index 357d437e534..ca74d976811 100644
--- a/backends/ebpf/targets/bcc_target.py
+++ b/backends/ebpf/targets/bcc_target.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
 # Copyright 2018 VMware, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy via target
 
 import sys
 from pathlib import Path
diff --git a/backends/ebpf/targets/kernel_target.py b/backends/ebpf/targets/kernel_target.py
index 571c0447bda..ab7a91f3581 100644
--- a/backends/ebpf/targets/kernel_target.py
+++ b/backends/ebpf/targets/kernel_target.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
 # Copyright 2018 VMware, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy via target
 
 import os
 import subprocess
diff --git a/backends/ebpf/targets/target.py b/backends/ebpf/targets/target.py
index 08d87d373c9..960994e61b6 100644
--- a/backends/ebpf/targets/target.py
+++ b/backends/ebpf/targets/target.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
 # Copyright 2018 VMware, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 """ Contains different eBPF models and specifies their individual behavior
     Currently five phases are defined:
    1. Invokes the specified compiler on a provided p4 file.
@@ -208,7 +198,7 @@ def check_outputs(self):
                 )
                 return testutils.FAILURE
             for idx, expected_pkt in enumerate(expected):
-                cmp = testutils.compare_pkt(expected_pkt, packets[idx])
+                cmp = testutils.compare_pkt(expected_pkt, packets[idx].build())
                 if cmp != testutils.SUCCESS:
                     testutils.log.error("Packet %s on port %s differs", idx, interface)
                     return cmp
diff --git a/backends/ebpf/targets/test_target.py b/backends/ebpf/targets/test_target.py
index a059e124d88..5c3888d018b 100644
--- a/backends/ebpf/targets/test_target.py
+++ b/backends/ebpf/targets/test_target.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python3
 # Copyright 2013-present Barefoot Networks, Inc.
 # Copyright 2018 VMware, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy via target
 
 import sys
 from glob import glob
diff --git a/backends/ebpf/tests/ptf/bng.py b/backends/ebpf/tests/ptf/bng.py
index d410f934af5..0ab6b06f91b 100644
--- a/backends/ebpf/tests/ptf/bng.py
+++ b/backends/ebpf/tests/ptf/bng.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python
 # Copyright 2022-present Orange
 # Copyright 2022-present Open Networking Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 from common import *
 from scapy.contrib.mpls import MPLS
diff --git a/backends/ebpf/tests/ptf/checksum.py b/backends/ebpf/tests/ptf/checksum.py
index e4139e6b11e..6d2d8e34fbe 100644
--- a/backends/ebpf/tests/ptf/checksum.py
+++ b/backends/ebpf/tests/ptf/checksum.py
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
+
 import random
 
 from common import *
diff --git a/backends/ebpf/tests/ptf/l2l3_acl.py b/backends/ebpf/tests/ptf/l2l3_acl.py
index 804f9ce30a1..dcd499e804e 100644
--- a/backends/ebpf/tests/ptf/l2l3_acl.py
+++ b/backends/ebpf/tests/ptf/l2l3_acl.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python
 # Copyright 2022-present Orange
 # Copyright 2022-present Open Networking Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 from common import *
 from ptf.mask import Mask
diff --git a/backends/ebpf/tests/ptf/table_implementation.py b/backends/ebpf/tests/ptf/table_implementation.py
index 41726cc6325..03929002c40 100644
--- a/backends/ebpf/tests/ptf/table_implementation.py
+++ b/backends/ebpf/tests/ptf/table_implementation.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python
 # Copyright 2022-present Orange
 # Copyright 2022-present Open Networking Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 from common import *
 from scapy.layers.l2 import Ether
diff --git a/backends/ebpf/tests/ptf/test.py b/backends/ebpf/tests/ptf/test.py
index 621100c6f02..1684877dc9d 100644
--- a/backends/ebpf/tests/ptf/test.py
+++ b/backends/ebpf/tests/ptf/test.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python
 # Copyright 2022-present Orange
 # Copyright 2022-present Open Networking Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 import copy
 
diff --git a/backends/ebpf/tests/ptf/upf.py b/backends/ebpf/tests/ptf/upf.py
index 74de6c7073d..23927fe90ac 100644
--- a/backends/ebpf/tests/ptf/upf.py
+++ b/backends/ebpf/tests/ptf/upf.py
@@ -1,18 +1,8 @@
 #!/usr/bin/env python
 # Copyright 2022-present Orange
 # Copyright 2022-present Open Networking Foundation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy
 
 from common import *
 from scapy.contrib.gtp import GTP_U_Header
diff --git a/backends/ubpf/targets/ubpf_target.py b/backends/ubpf/targets/ubpf_target.py
index c1c8ff32a76..17b74d60777 100644
--- a/backends/ubpf/targets/ubpf_target.py
+++ b/backends/ubpf/targets/ubpf_target.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Reason-GPL: import-scapy via target
 import sys
 from glob import glob
 from pathlib import Path
diff --git a/tools/testutils.py b/tools/testutils.py
index 82d11f5d607..da0ab415a16 100644
--- a/tools/testutils.py
+++ b/tools/testutils.py
@@ -27,8 +27,6 @@
 from pathlib import Path
 from typing import Any, Dict, List, NamedTuple, Optional, Union
 
-import scapy.packet
-
 # Set up logging.
 log = logging.getLogger(__name__)
 
@@ -93,7 +91,7 @@ def hex_to_byte(hex_str: str) -> str:
     return "".join(byte_vals)
 
 
-def compare_pkt(expected: str, received: scapy.packet.Packet) -> int:
+def compare_pkt(expected: str, received: bytes) -> int:
     """Compare two given byte sequences and check if they are the same.
     Report errors if this is not the case."""
 
@@ -104,7 +102,7 @@ def compare_pkt(expected: str, received: scapy.packet.Packet) -> int:
         strict_length_check = True
         expected = expected[:-1]
 
-    received = received.build().hex().upper()
+    received = received.hex().upper()
     expected = "".join(expected.split()).upper()
     if strict_length_check and len(received) > len(expected):
         log.error(