diff --git a/lib/Crypto/Math/_IntegerBase.py b/lib/Crypto/Math/_IntegerBase.py
index 931743aa1..da1f9054e 100644
--- a/lib/Crypto/Math/_IntegerBase.py
+++ b/lib/Crypto/Math/_IntegerBase.py
@@ -409,4 +409,3 @@ def _mult_modulo_bytes(term1, term2, modulus):
             It is as long as the modulus would be, with zero padding
             on the left if needed.
         """
-        pass
diff --git a/lib/Crypto/Random/__init__.py b/lib/Crypto/Random/__init__.py
index 0f83a07e3..521820d18 100644
--- a/lib/Crypto/Random/__init__.py
+++ b/lib/Crypto/Random/__init__.py
@@ -32,15 +32,12 @@ def read(self, n):
 
     def flush(self):
         """Method provided for backward compatibility only."""
-        pass
 
     def reinit(self):
         """Method provided for backward compatibility only."""
-        pass
 
     def close(self):
         """Method provided for backward compatibility only."""
-        pass
         
 
 def new(*args, **kwargs):
diff --git a/lib/Crypto/Signature/pkcs1_15.py b/lib/Crypto/Signature/pkcs1_15.py
index 0b02d998e..a8f64375d 100644
--- a/lib/Crypto/Signature/pkcs1_15.py
+++ b/lib/Crypto/Signature/pkcs1_15.py
@@ -136,7 +136,6 @@ def verify(self, msg_hash, signature):
         #
         if em1 not in possible_em1:
             raise ValueError("Invalid signature")
-        pass
 
 
 def _EMSA_PKCS1_V1_5_ENCODE(msg_hash, emLen, with_hash_parameters=True):