diff --git a/katran/lib/testing/fplane_testing.py b/katran/lib/testing/fplane_testing.py
index 959d650cb..ed77c109d 100644
--- a/katran/lib/testing/fplane_testing.py
+++ b/katran/lib/testing/fplane_testing.py
@@ -13,7 +13,6 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-from __future__ import absolute_import, division, print_function
 
 import argparse
 import time
@@ -191,7 +190,7 @@ def __init__(self, args, queue):
         self._queue = queue
 
     def sniff_packets(self):
-        pcap_filter = "ether src host {}".format(self._katran_mac)
+        pcap_filter = f"ether src host {self._katran_mac}"
         sniff(filter=pcap_filter, iface=self._iface, prn=self.process_received_packet)
 
     def send_test_pckts(self):
@@ -224,9 +223,9 @@ def read_queue(self):
 
     def print_test_results(self):
         for test in self._recved_pckts.values():
-            print("test: {:70} passed".format(test))
+            print(f"test: {test:70} passed")
         for test in self._missed_pckts.values():
-            print("test: {:70} failed".format(test))
+            print(f"test: {test:70} failed")
 
     def process_received_packet(self, packet):
         if self._verbose:
diff --git a/tools/tcpdump_encap_helper/tcpdump_encap_helper.py b/tools/tcpdump_encap_helper/tcpdump_encap_helper.py
index 05862b1a0..fb70728d6 100755
--- a/tools/tcpdump_encap_helper/tcpdump_encap_helper.py
+++ b/tools/tcpdump_encap_helper/tcpdump_encap_helper.py
@@ -42,7 +42,7 @@ def ipv4_in_hex(addr):
     @param string addr ipv4 address
     @return string hex representation of this address
     """
-    return "0x{:08X}".format(int(ipaddress.ip_address(addr)))
+    return f"0x{int(ipaddress.ip_address(addr)):08X}"
 
 
 def ip6_exploded(addr):
@@ -51,8 +51,7 @@ def ip6_exploded(addr):
     @return list<string> ipv6 addresses splited into 4 groups by 32bit each
     """
     return [
-        "0x{:04X}".format(x)
-        for x in struct.unpack("!IIII", ipaddress.ip_address(addr).packed)
+        f"0x{x:04X}" for x in struct.unpack("!IIII", ipaddress.ip_address(addr).packed)
     ]
 
 
@@ -68,9 +67,7 @@ def modify_filter(tcpdump_filters, value, offset, size, v6=False):
     packet_type = "ip"
     if v6:
         packet_type = "ip6"
-    tcpdump_filters.append(
-        "({}[{}:{}] == {} )".format(packet_type, offset, size, value)
-    )
+    tcpdump_filters.append(f"({packet_type}[{offset}:{size}] == {value} )")
     return tcpdump_filters