diff --git a/eos/saveddata/drone.py b/eos/saveddata/drone.py
index 9a329e9f2..1ca07a784 100644
--- a/eos/saveddata/drone.py
+++ b/eos/saveddata/drone.py
@@ -201,7 +201,10 @@ class Drone(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
         # Do not allow to apply offensive modules on ship with offensive module immunite, with few exceptions
         # (all effects which apply instant modification are exception, generally speaking)
         if item.offensive and projectedOnto.ship.getModifiedItemAttr("disallowOffensiveModifiers") == 1:
-            offensiveNonModifiers = set(("energyDestabilizationNew", "leech", "energyNosferatuFalloff", "energyNeutralizerFalloff"))
+            offensiveNonModifiers = {"energyDestabilizationNew",
+                                     "leech",
+                                     "energyNosferatuFalloff",
+                                     "energyNeutralizerFalloff"}
             if not offensiveNonModifiers.intersection(set(item.effects)):
                 return False
         # If assistive modules are not allowed, do not let to apply these altogether
diff --git a/eos/saveddata/fighter.py b/eos/saveddata/fighter.py
index 5043f1ad6..e409b1578 100644
--- a/eos/saveddata/fighter.py
+++ b/eos/saveddata/fighter.py
@@ -236,7 +236,10 @@ class Fighter(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
         # Do not allow to apply offensive modules on ship with offensive module immunite, with few exceptions
         # (all effects which apply instant modification are exception, generally speaking)
         if item.offensive and projectedOnto.ship.getModifiedItemAttr("disallowOffensiveModifiers") == 1:
-            offensiveNonModifiers = set(("energyDestabilizationNew", "leech", "energyNosferatuFalloff", "energyNeutralizerFalloff"))
+            offensiveNonModifiers = {"energyDestabilizationNew",
+                                     "leech",
+                                     "energyNosferatuFalloff",
+                                     "energyNeutralizerFalloff"}
             if not offensiveNonModifiers.intersection(set(item.effects)):
                 return False
         # If assistive modules are not allowed, do not let to apply these altogether
diff --git a/eos/saveddata/module.py b/eos/saveddata/module.py
index be1aed929..9ae63aafd 100644
--- a/eos/saveddata/module.py
+++ b/eos/saveddata/module.py
@@ -489,7 +489,10 @@ class Module(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
             # Do not allow to apply offensive modules on ship with offensive module immunite, with few exceptions
             # (all effects which apply instant modification are exception, generally speaking)
             if item.offensive and projectedOnto.ship.getModifiedItemAttr("disallowOffensiveModifiers") == 1:
-                offensiveNonModifiers = set(("energyDestabilizationNew", "leech", "energyNosferatuFalloff", "energyNeutralizerFalloff"))
+                offensiveNonModifiers = {"energyDestabilizationNew",
+                                         "leech",
+                                         "energyNosferatuFalloff",
+                                         "energyNeutralizerFalloff"}
                 if not offensiveNonModifiers.intersection(set(item.effects)):
                     return False
             # If assistive modules are not allowed, do not let to apply these altogether