diff --git a/monkey/monkey_island/cc/server_utils/encryption/password_based_bytes_encryptor.py b/monkey/monkey_island/cc/server_utils/encryption/password_based_bytes_encryptor.py
index dd9ea329f..e28ebf4c8 100644
--- a/monkey/monkey_island/cc/server_utils/encryption/password_based_bytes_encryptor.py
+++ b/monkey/monkey_island/cc/server_utils/encryption/password_based_bytes_encryptor.py
@@ -56,8 +56,8 @@ class PasswordBasedBytesEncryptor(IEncryptor):
 
 
 class InvalidCredentialsError(Exception):
-    """ Raised when password for decryption is invalid """
+    """Raised when password for decryption is invalid"""
 
 
 class InvalidCiphertextError(Exception):
-    """ Raised when ciphertext is corrupted """
+    """Raised when ciphertext is corrupted"""
diff --git a/monkey/monkey_island/cc/services/attack/technique_reports/__init__.py b/monkey/monkey_island/cc/services/attack/technique_reports/__init__.py
index e11d6297b..785c0fe27 100644
--- a/monkey/monkey_island/cc/services/attack/technique_reports/__init__.py
+++ b/monkey/monkey_island/cc/services/attack/technique_reports/__init__.py
@@ -16,7 +16,7 @@ logger = logging.getLogger(__name__)
 
 
 class AttackTechnique(object, metaclass=abc.ABCMeta):
-    """ Abstract class for ATT&CK report components """
+    """Abstract class for ATT&CK report components"""
 
     config_schema_per_attack_technique = None
 
diff --git a/monkey/monkey_island/cc/services/attack/technique_reports/pba_technique.py b/monkey/monkey_island/cc/services/attack/technique_reports/pba_technique.py
index c370590d9..18397959b 100644
--- a/monkey/monkey_island/cc/services/attack/technique_reports/pba_technique.py
+++ b/monkey/monkey_island/cc/services/attack/technique_reports/pba_technique.py
@@ -7,7 +7,7 @@ from monkey_island.cc.services.attack.technique_reports import AttackTechnique
 
 
 class PostBreachTechnique(AttackTechnique, metaclass=abc.ABCMeta):
-    """ Class for ATT&CK report components of post-breach actions """
+    """Class for ATT&CK report components of post-breach actions"""
 
     @property
     @abc.abstractmethod