diff --git a/.swiftlint.yml b/.swiftlint.yml
index a8fa31b..89a3481 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -170,7 +170,7 @@ only_rules:
   - sorted_first_last
 #  - sorted_imports # Managed by SwiftFormat.
   - statement_position
-#  - static_operator
+  - static_operator
   - strict_fileprivate
   - strong_iboutlet
   - superfluous_disable_command
diff --git a/passKit/Parser/AdditionField.swift b/passKit/Parser/AdditionField.swift
index 31a6b49..91203b0 100644
--- a/passKit/Parser/AdditionField.swift
+++ b/passKit/Parser/AdditionField.swift
@@ -38,6 +38,9 @@ extension AdditionField {
 }
 
 infix operator =>: MultiplicationPrecedence
-public func => (key: String, value: String) -> AdditionField {
-    AdditionField(title: key, content: value)
+
+public extension String {
+    static func => (key: String, value: String) -> AdditionField {
+        AdditionField(title: key, content: value)
+    }
 }
diff --git a/passKitTests/Testbase/TestBase.swift b/passKitTests/Testbase/TestBase.swift
index 2939bf3..5c816cb 100644
--- a/passKitTests/Testbase/TestBase.swift
+++ b/passKitTests/Testbase/TestBase.swift
@@ -50,11 +50,14 @@ func assertDefaults(
 }
 
 infix operator ∈: AdditionPrecedence
-func ∈ (field: AdditionField, password: Password) -> Bool { // swiftlint:disable:this identifier_name
-    password.getFilteredAdditions().contains(field)
-}
-
 infix operator ∉: AdditionPrecedence
-func ∉ (field: AdditionField, password: Password) -> Bool { // swiftlint:disable:this identifier_name
-    !(field ∈ password)
+
+extension AdditionField {
+    static func ∈ (field: AdditionField, password: Password) -> Bool { // swiftlint:disable:this identifier_name
+        password.getFilteredAdditions().contains(field)
+    }
+
+    static func ∉ (field: AdditionField, password: Password) -> Bool { // swiftlint:disable:this identifier_name
+        !(field ∈ password)
+    }
 }