diff --git a/contracts/Reactant/Models/Reactant.php b/contracts/Reactant/Models/Reactant.php
index 30a463ab..ea2b8d53 100644
--- a/contracts/Reactant/Models/Reactant.php
+++ b/contracts/Reactant/Models/Reactant.php
@@ -35,7 +35,7 @@ public function getReactions(): iterable;
      */
     public function getReactionCounters(): iterable;
 
-    public function getReactionCounterOfType(ReactionType $type): ReactionCounter;
+    public function getReactionCounterOfType(ReactionType $reactionType): ReactionCounter;
 
     public function getReactionTotal(): ReactionTotal;
 
@@ -51,7 +51,7 @@ public function isNull(): bool;
 
     public function isNotNull(): bool;
 
-    public function createReactionCounterOfType(ReactionType $type): void;
+    public function createReactionCounterOfType(ReactionType $reactionType): void;
 
     public function createReactionTotal(): void;
 }
diff --git a/contracts/Reactant/ReactionCounter/Models/ReactionCounter.php b/contracts/Reactant/ReactionCounter/Models/ReactionCounter.php
index bf300a2c..26cfa944 100644
--- a/contracts/Reactant/ReactionCounter/Models/ReactionCounter.php
+++ b/contracts/Reactant/ReactionCounter/Models/ReactionCounter.php
@@ -22,9 +22,9 @@ public function getReactant(): Reactant;
 
     public function getReactionType(): ReactionType;
 
-    public function isReactionOfType(ReactionType $type): bool;
+    public function isReactionOfType(ReactionType $reactionType): bool;
 
-    public function isNotReactionOfType(ReactionType $type): bool;
+    public function isNotReactionOfType(ReactionType $reactionType): bool;
 
     public function getCount(): int;
 
diff --git a/contracts/Reaction/Models/Reaction.php b/contracts/Reaction/Models/Reaction.php
index 552790d6..d5cbc57c 100644
--- a/contracts/Reaction/Models/Reaction.php
+++ b/contracts/Reaction/Models/Reaction.php
@@ -31,9 +31,9 @@ public function getRate(): float;
 
     public function getWeight(): float;
 
-    public function isOfType(ReactionType $type): bool;
+    public function isOfType(ReactionType $reactionType): bool;
 
-    public function isNotOfType(ReactionType $type): bool;
+    public function isNotOfType(ReactionType $reactionType): bool;
 
     public function isToReactant(Reactant $reactant): bool;