diff --git a/Snapshots/Layout/Layout/LayoutNode.swift b/Snapshots/Layout/Layout/LayoutNode.swift
index c0c8a4a9..7c741196 100755
--- a/Snapshots/Layout/Layout/LayoutNode.swift
+++ b/Snapshots/Layout/Layout/LayoutNode.swift
@@ -278,7 +278,7 @@ public class LayoutNode: NSObject {
     public override func observeValue(
         forKeyPath _: String?,
         of _: Any?,
-        change: [NSKeyValueChangeKey: Any]?,
+        change _: [NSKeyValueChangeKey: Any]?,
         context _: UnsafeMutableRawPointer?
     ) {
         guard _setupComplete, _updateLock == 0, _evaluating.isEmpty,
diff --git a/Snapshots/Layout/Layout/Shared/XMLParser.swift b/Snapshots/Layout/Layout/Shared/XMLParser.swift
index 84e140ad..023070dd 100755
--- a/Snapshots/Layout/Layout/Shared/XMLParser.swift
+++ b/Snapshots/Layout/Layout/Shared/XMLParser.swift
@@ -185,7 +185,7 @@ class XMLParser: NSObject, XMLParserDelegate {
         top = node
     }
 
-    func parser(_: Foundation.XMLParser, didEndElement elementName: String, namespaceURI _: String?, qualifiedName _: String?) {
+    func parser(_: Foundation.XMLParser, didEndElement _: String, namespaceURI _: String?, qualifiedName _: String?) {
         if !top!.isHTML {
             if top!.children.isEmpty {
                 text = text.trimmingCharacters(in: .whitespacesAndNewlines)
diff --git a/Snapshots/Layout/Layout/UIView+Layout.swift b/Snapshots/Layout/Layout/UIView+Layout.swift
index 2b624f1e..8dea2dbf 100755
--- a/Snapshots/Layout/Layout/UIView+Layout.swift
+++ b/Snapshots/Layout/Layout/UIView+Layout.swift
@@ -334,7 +334,7 @@ extension UIView: LayoutManaged {
 
     /// Called immediately before a child node is added
     /// Returning false will cancel insertion of the node
-    @objc open func shouldInsertChildNode(_ node: LayoutNode, at _: Int) -> Bool {
+    @objc open func shouldInsertChildNode(_: LayoutNode, at _: Int) -> Bool {
         return true
     }
 
diff --git a/Snapshots/Layout/Layout/UIViewController+Layout.swift b/Snapshots/Layout/Layout/UIViewController+Layout.swift
index 6d02f0b4..3906aa6c 100755
--- a/Snapshots/Layout/Layout/UIViewController+Layout.swift
+++ b/Snapshots/Layout/Layout/UIViewController+Layout.swift
@@ -315,7 +315,7 @@ extension UIViewController: LayoutManaged {
 
     /// Called immediately before a child node is added
     /// Returning false will cancel insertion of the node
-    @objc open func shouldInsertChildNode(_ node: LayoutNode, at _: Int) -> Bool {
+    @objc open func shouldInsertChildNode(_: LayoutNode, at _: Int) -> Bool {
         return true
     }
 
diff --git a/Sources/Rules.swift b/Sources/Rules.swift
index 9292571d..30839fcc 100644
--- a/Sources/Rules.swift
+++ b/Sources/Rules.swift
@@ -2840,9 +2840,11 @@ public struct _FormatRules {
                     formatter.index(of: .nonSpaceOrCommentOrLinebreak, after: externalNameIndex) else { return }
                 let nextToken = formatter.tokens[nextIndex]
                 switch nextToken {
-                case let .identifier(name) where name != "_":
-                    argNames.append(nextToken.unescaped())
-                    nameIndexPairs.append((externalNameIndex, nextIndex))
+                case let .identifier(name):
+                    if name != "_" {
+                        argNames.append(nextToken.unescaped())
+                        nameIndexPairs.append((externalNameIndex, nextIndex))
+                    }
                 case .delimiter(":"):
                     let externalNameToken = formatter.tokens[externalNameIndex]
                     if case let .identifier(name) = externalNameToken, name != "_" {
diff --git a/Tests/CommandLineTests.swift b/Tests/CommandLineTests.swift
index 915049d6..36fa9560 100644
--- a/Tests/CommandLineTests.swift
+++ b/Tests/CommandLineTests.swift
@@ -228,6 +228,7 @@ class CommandLineTests: XCTestCase {
         CLI.print = { message, _ in
             Swift.print(message)
         }
-        XCTAssertEqual(CLI.run(in: projectDirectory.path, with: "Snapshots --unexclude Snapshots --symlinks follow --lint --cache ignore"), .ok)
+        // NOTE: to update regression suite, run again without `--lint` argument
+        XCTAssertEqual(CLI.run(in: projectDirectory.path, with: "Snapshots --unexclude Snapshots --symlinks follow --cache ignore --lint"), .ok)
     }
 }
diff --git a/Tests/RulesTests.swift b/Tests/RulesTests.swift
index 92131d83..034ed018 100644
--- a/Tests/RulesTests.swift
+++ b/Tests/RulesTests.swift
@@ -7339,6 +7339,18 @@ class RulesTests: XCTestCase {
         testFormatting(for: input, rule: FormatRules.unusedArguments)
     }
 
+    func testPartiallyMarkedUnusedArguments() {
+        let input = "func foo(bar: Bar, baz _: Baz) {}"
+        let output = "func foo(bar _: Bar, baz _: Baz) {}"
+        testFormatting(for: input, output, rule: FormatRules.unusedArguments)
+    }
+
+    func testPartiallyMarkedUnusedArguments2() {
+        let input = "func foo(bar _: Bar, baz: Baz) {}"
+        let output = "func foo(bar _: Bar, baz _: Baz) {}"
+        testFormatting(for: input, output, rule: FormatRules.unusedArguments)
+    }
+
     // functions (closure-only)
 
     func testNoMarkFunctionArgument() {
diff --git a/Tests/XCTestManifests.swift b/Tests/XCTestManifests.swift
index e8522cfb..f1f35e0c 100644
--- a/Tests/XCTestManifests.swift
+++ b/Tests/XCTestManifests.swift
@@ -1259,6 +1259,8 @@ extension RulesTests {
         ("testParensRemovedBeforeTrailingClosure3", testParensRemovedBeforeTrailingClosure3),
         ("testParensRemovedBeforeTrailingClosureInsideHashIf", testParensRemovedBeforeTrailingClosureInsideHashIf),
         ("testParensRemovedOnLineAfterSelectorIdentifier", testParensRemovedOnLineAfterSelectorIdentifier),
+        ("testPartiallyMarkedUnusedArguments", testPartiallyMarkedUnusedArguments),
+        ("testPartiallyMarkedUnusedArguments2", testPartiallyMarkedUnusedArguments2),
         ("testPerformBatchUpdatesNotMadeTrailing", testPerformBatchUpdatesNotMadeTrailing),
         ("testPInExponentialNotConvertedToLower", testPInExponentialNotConvertedToLower),
         ("testPInExponentialNotConvertedToUpper", testPInExponentialNotConvertedToUpper),