diff --git a/settings.py b/settings.py
index 1314f11..5ec5f46 100644
--- a/settings.py
+++ b/settings.py
@@ -206,7 +206,7 @@ class Settings:
 		if self.NumChal.lower() == 'random':
 			self.NumChal = "random"
 
-		if len(self.NumChal) is not 16 and not "random":
+		if len(self.NumChal) != 16 and self.NumChal != "random":
 			print(utils.color("[!] The challenge must be exactly 16 chars long.\nExample: 1122334455667788", 1))
 			sys.exit(-1)
 
diff --git a/tools/MultiRelay.py b/tools/MultiRelay.py
index ac34d3d..db4416d 100755
--- a/tools/MultiRelay.py
+++ b/tools/MultiRelay.py
@@ -412,12 +412,12 @@ class SMBRelay(BaseRequestHandler):
                 data = self.request.recv(4096)
 
             ## Make sure it's not a Kerberos auth.
-            if data.find("NTLM") is not -1:
+            if data.find("NTLM") != -1:
                ## Start with nego protocol + session setup negotiate to our target.
                data, smbdata, s, challenge = GrabNegotiateFromTarget(data, s, Pivoting)
 
             ## Make sure it's not a Kerberos auth.
-            if data.find("NTLM") is not -1:
+            if data.find("NTLM") != -1:
                 ##Relay all that to our client.
                 if data[8:10] == "\x73\x00":
                    head = SMBHeader(cmd="\x73",flag1="\x98", flag2="\x43\xc8", errorcode="\x16\x00\x00\xc0", pid=pidcalc(data),mid=midcalc(data))
diff --git a/tools/RunFingerPackets.py b/tools/RunFingerPackets.py
index e5ce645..d6ab48b 100644
--- a/tools/RunFingerPackets.py
+++ b/tools/RunFingerPackets.py
@@ -11,7 +11,7 @@ else:
 
 def StructWithLenPython2or3(endian,data):
     #Python2...
-    if PY2OR3 is "PY2":
+    if PY2OR3 == "PY2":
         return struct.pack(endian, data)
     #Python3...
     else: