diff --git a/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRule.swift b/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRule.swift
index c86b9555c8..b3e6a70a81 100644
--- a/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRule.swift
+++ b/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRule.swift
@@ -25,116 +25,11 @@ public struct UnusedDeclarationRule: AutomaticTestableRule, ConfigurationProvide
         name: "Unused Declaration",
         description: "Declarations should be referenced at least once within all files linted.",
         kind: .lint,
-        nonTriggeringExamples: [
-            Example("""
-            let kConstant = 0
-            _ = kConstant
-            """),
-            Example("""
-            enum Change<T> {
-              case insert(T)
-              case delete(T)
-            }
-
-            extension Sequence {
-              func deletes<T>() -> [T] where Element == Change<T> {
-                return compactMap { operation in
-                  if case .delete(let value) = operation {
-                    return value
-                  } else {
-                    return nil
-                  }
-                }
-              }
-            }
-
-            let changes = [Change.insert(0), .delete(0)]
-            changes.deletes()
-            """),
-            Example("""
-            struct Item {}
-            struct ResponseModel: Codable {
-                let items: [Item]
-
-                enum CodingKeys: String, CodingKey {
-                    case items = "ResponseItems"
-                }
-            }
-
-            _ = ResponseModel(items: [Item()]).items
-            """),
-            Example("""
-            class ResponseModel {
-                @objc func foo() {
-                }
-            }
-            _ = ResponseModel()
-            """),
-            Example("""
-            public func foo() {}
-            """)
-        ] + platformSpecificNonTriggeringExamples,
-        triggeringExamples: [
-            Example("""
-            let ↓kConstant = 0
-            """),
-            Example("""
-            struct Item {}
-            struct ↓ResponseModel: Codable {
-                let ↓items: [Item]
-
-                enum ↓CodingKeys: String {
-                    case items = "ResponseItems"
-                }
-            }
-            """),
-            Example("""
-            class ↓ResponseModel {
-                func ↓foo() {
-                }
-            }
-            """)
-        ] + platformSpecificTriggeringExamples,
+        nonTriggeringExamples: UnusedDeclarationRuleExamples.nonTriggeringExamples,
+        triggeringExamples: UnusedDeclarationRuleExamples.triggeringExamples,
         requiresFileOnDisk: true
     )
 
-#if os(macOS)
-    private static let platformSpecificNonTriggeringExamples = [
-        Example("""
-        import Cocoa
-
-        @NSApplicationMain
-        final class AppDelegate: NSObject, NSApplicationDelegate {
-            func applicationWillFinishLaunching(_ notification: Notification) {}
-            func applicationWillBecomeActive(_ notification: Notification) {}
-        }
-        """)
-    ]
-
-    private static let platformSpecificTriggeringExamples = [
-        Example("""
-        import Cocoa
-
-        @NSApplicationMain
-        final class AppDelegate: NSObject, NSApplicationDelegate {
-            func ↓appWillFinishLaunching(_ notification: Notification) {}
-            func applicationWillBecomeActive(_ notification: Notification) {}
-        }
-        """),
-        Example("""
-        import Cocoa
-
-        final class ↓AppDelegate: NSObject, NSApplicationDelegate {
-            func applicationWillFinishLaunching(_ notification: Notification) {}
-            func applicationWillBecomeActive(_ notification: Notification) {}
-        }
-        """)
-    ]
-#else
-    private static let platformSpecificNonTriggeringExamples = [Example]()
-    private static let platformSpecificTriggeringExamples = [Example]()
-#endif
-
     public func collectInfo(for file: SwiftLintFile, compilerArguments: [String]) -> UnusedDeclarationRule.FileUSRs {
         guard !compilerArguments.isEmpty else {
             queuedPrintError("""
diff --git a/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRuleExamples.swift b/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRuleExamples.swift
new file mode 100644
index 0000000000..9496c83e28
--- /dev/null
+++ b/Source/SwiftLintFramework/Rules/Lint/UnusedDeclarationRuleExamples.swift
@@ -0,0 +1,133 @@
+struct UnusedDeclarationRuleExamples {
+    static let nonTriggeringExamples = [
+        Example("""
+        let kConstant = 0
+        _ = kConstant
+        """),
+        Example("""
+        enum Change<T> {
+          case insert(T)
+          case delete(T)
+        }
+
+        extension Sequence {
+          func deletes<T>() -> [T] where Element == Change<T> {
+            return compactMap { operation in
+              if case .delete(let value) = operation {
+                return value
+              } else {
+                return nil
+              }
+            }
+          }
+        }
+
+        let changes = [Change.insert(0), .delete(0)]
+        changes.deletes()
+        """),
+        Example("""
+        struct Item {}
+        struct ResponseModel: Codable {
+            let items: [Item]
+
+            enum CodingKeys: String, CodingKey {
+                case items = "ResponseItems"
+            }
+        }
+
+        _ = ResponseModel(items: [Item()]).items
+        """),
+        Example("""
+        class ResponseModel {
+            @objc func foo() {
+            }
+        }
+        _ = ResponseModel()
+        """),
+        Example("""
+        public func foo() {}
+        """),
+        Example("""
+        protocol Foo {}
+
+        extension Foo {
+            func bar() {}
+        }
+
+        struct MyStruct: Foo {}
+        MyStruct().bar()
+        """)
+    ] + platformSpecificNonTriggeringExamples
+
+    static let triggeringExamples = [
+        Example("""
+        let ↓kConstant = 0
+        """),
+        Example("""
+        struct Item {}
+        struct ↓ResponseModel: Codable {
+            let ↓items: [Item]
+
+            enum ↓CodingKeys: String {
+                case items = "ResponseItems"
+            }
+        }
+        """),
+        Example("""
+        class ↓ResponseModel {
+            func ↓foo() {
+            }
+        }
+        """),
+        Example("""
+        protocol Foo {
+            func ↓bar1()
+        }
+
+        extension Foo {
+            func bar1() {}
+            func ↓bar2() {}
+        }
+
+        struct MyStruct: Foo {}
+        _ = MyStruct()
+        """)
+    ] + platformSpecificTriggeringExamples
+
+#if os(macOS)
+    private static let platformSpecificNonTriggeringExamples = [
+        Example("""
+        import Cocoa
+
+        @NSApplicationMain
+        final class AppDelegate: NSObject, NSApplicationDelegate {
+            func applicationWillFinishLaunching(_ notification: Notification) {}
+            func applicationWillBecomeActive(_ notification: Notification) {}
+        }
+        """)
+    ]
+
+    private static let platformSpecificTriggeringExamples = [
+        Example("""
+        import Cocoa
+
+        @NSApplicationMain
+        final class AppDelegate: NSObject, NSApplicationDelegate {
+            func ↓appWillFinishLaunching(_ notification: Notification) {}
+            func applicationWillBecomeActive(_ notification: Notification) {}
+        }
+        """),
+        Example("""
+        import Cocoa
+
+        final class ↓AppDelegate: NSObject, NSApplicationDelegate {
+            func applicationWillFinishLaunching(_ notification: Notification) {}
+            func applicationWillBecomeActive(_ notification: Notification) {}
+        }
+        """)
+    ]
+#else
+    private static let platformSpecificNonTriggeringExamples = [Example]()
+    private static let platformSpecificTriggeringExamples = [Example]()
+#endif
+}
diff --git a/SwiftLint.xcodeproj/project.pbxproj b/SwiftLint.xcodeproj/project.pbxproj
index 13f96582d0..980fd1979b 100644
--- a/SwiftLint.xcodeproj/project.pbxproj
+++ b/SwiftLint.xcodeproj/project.pbxproj
@@ -196,6 +196,7 @@
 		8F0856EB22DA8508001FF4D4 /* UnusedDeclarationRule.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F0856EA22DA8508001FF4D4 /* UnusedDeclarationRule.swift */; };
 		8F2CC1CB20A6A070006ED34F /* FileNameConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F2CC1CA20A6A070006ED34F /* FileNameConfiguration.swift */; };
 		8F2CC1CD20A6A189006ED34F /* FileNameRuleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F2CC1CC20A6A189006ED34F /* FileNameRuleTests.swift */; };
+		8F4E30D52519092800EED8CB /* UnusedDeclarationRuleExamples.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F4E30D42519092800EED8CB /* UnusedDeclarationRuleExamples.swift */; };
 		8F6AA75B211905B8009BA28A /* LintableFilesVisitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F6AA75A211905B8009BA28A /* LintableFilesVisitor.swift */; };
 		8F6AA75D21190830009BA28A /* CompilerArgumentsExtractor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F6AA75C21190830009BA28A /* CompilerArgumentsExtractor.swift */; };
 		8F715B83213B528B00427BD9 /* UnusedImportRule.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8F715B82213B528B00427BD9 /* UnusedImportRule.swift */; };
@@ -720,6 +721,7 @@
 		8F0856EA22DA8508001FF4D4 /* UnusedDeclarationRule.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UnusedDeclarationRule.swift; sourceTree = "<group>"; };
 		8F2CC1CA20A6A070006ED34F /* FileNameConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FileNameConfiguration.swift; sourceTree = "<group>"; };
 		8F2CC1CC20A6A189006ED34F /* FileNameRuleTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FileNameRuleTests.swift; sourceTree = "<group>"; };
+		8F4E30D42519092800EED8CB /* UnusedDeclarationRuleExamples.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UnusedDeclarationRuleExamples.swift; sourceTree = "<group>"; };
 		8F6AA75A211905B8009BA28A /* LintableFilesVisitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LintableFilesVisitor.swift; sourceTree = "<group>"; };
 		8F6AA75C21190830009BA28A /* CompilerArgumentsExtractor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CompilerArgumentsExtractor.swift; sourceTree = "<group>"; };
 		8F715B82213B528B00427BD9 /* UnusedImportRule.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UnusedImportRule.swift; sourceTree = "<group>"; };
@@ -1247,6 +1249,7 @@
 				D40AD0891E032F9700F48C30 /* UnusedClosureParameterRule.swift */,
 				D4D7320C21E15ED4001C07D9 /* UnusedControlFlowLabelRule.swift */,
 				8F0856EA22DA8508001FF4D4 /* UnusedDeclarationRule.swift */,
+				8F4E30D42519092800EED8CB /* UnusedDeclarationRuleExamples.swift */,
 				8F715B82213B528B00427BD9 /* UnusedImportRule.swift */,
 				8FF49E0623FC9E40003AC871 /* UnusedImportRuleExamples.swift */,
 				D4BED5F72278AECC00D86BCE /* UnownedVariableCaptureRule.swift */,
@@ -2132,6 +2135,7 @@
 				D4FBADD01E00DA0400669C73 /* OperatorUsageWhitespaceRule.swift in Sources */,
 				D4C4A3521DEFBBB700E0E04C /* FileHeaderConfiguration.swift in Sources */,
 				623675B01F960C5C009BE6F3 /* QuickDiscouragedPendingTestRule.swift in Sources */,
+				8F4E30D52519092800EED8CB /* UnusedDeclarationRuleExamples.swift in Sources */,
 				287F8B642230843000BDC504 /* NSLocalizedStringRequireBundleRule.swift in Sources */,
 				D47079AD1DFE2FA700027086 /* EmptyParametersRule.swift in Sources */,
 				E87E4A091BFB9CAE00FCFE46 /* SyntaxKind+SwiftLint.swift in Sources */,