diff --git a/Sources/Inference.swift b/Sources/Inference.swift
index 20e04c14..e7f4fbd7 100644
--- a/Sources/Inference.swift
+++ b/Sources/Inference.swift
@@ -898,19 +898,19 @@ private struct Inference {
                         }
                     }
                     let name = token.unescaped()
-                    if members.contains(name), !localNames.contains(name), !isAssignmentKeyword ||
-                        formatter.last(.nonSpaceOrCommentOrLinebreak, before: index) == .operator("=", .infix) {
-                        if let lastToken = formatter.last(.nonSpaceOrCommentOrLinebreak, before: index),
-                            lastToken.isOperator(".") {
-                            break
-                        }
-                        if isInit, formatter.next(.nonSpaceOrCommentOrLinebreak, after: index) == .operator("=", .infix) {
-                            initRemoved += 1
-                        } else {
-                            removed += 1
-                        }
-                        index += 1
-                        continue
+                    guard members.contains(name), !localNames.contains(name), !isAssignmentKeyword ||
+                        formatter.last(.nonSpaceOrCommentOrLinebreak, before: index) == .operator("=", .infix),
+                        formatter.next(.nonSpaceOrComment, after: index) != .delimiter(":") else {
+                        break
+                    }
+                    if let lastToken = formatter.last(.nonSpaceOrCommentOrLinebreak, before: index),
+                        lastToken.isOperator(".") {
+                        break
+                    }
+                    if isInit, formatter.next(.nonSpaceOrCommentOrLinebreak, after: index) == .operator("=", .infix) {
+                        initRemoved += 1
+                    } else {
+                        removed += 1
                     }
                 case .endOfScope("case"), .endOfScope("default"):
                     return
diff --git a/Sources/Rules.swift b/Sources/Rules.swift
index 241d3494..788311ca 100644
--- a/Sources/Rules.swift
+++ b/Sources/Rules.swift
@@ -2521,17 +2521,17 @@ public struct _FormatRules {
                         }
                     }
                     let name = token.unescaped()
-                    if members.contains(name), !localNames.contains(name), !isAssignmentKeyword ||
-                        formatter.last(.nonSpaceOrCommentOrLinebreak, before: index) == .operator("=", .infix) {
-                        if let lastToken = formatter.last(.nonSpaceOrCommentOrLinebreak, before: index),
-                            lastToken.isOperator(".") {
-                            break
-                        }
-                        if formatter.nextToken(after: index) != .delimiter(":") {
-                            formatter.insertTokens([.identifier("self"), .operator(".", .infix)], at: index)
-                            index += 2
-                        }
+                    guard members.contains(name), !localNames.contains(name), !isAssignmentKeyword ||
+                        formatter.last(.nonSpaceOrCommentOrLinebreak, before: index) == .operator("=", .infix),
+                        formatter.next(.nonSpaceOrComment, after: index) != .delimiter(":") else {
+                        break
                     }
+                    if let lastToken = formatter.last(.nonSpaceOrCommentOrLinebreak, before: index),
+                        lastToken.isOperator(".") {
+                        break
+                    }
+                    formatter.insertTokens([.identifier("self"), .operator(".", .infix)], at: index)
+                    index += 2
                 case .endOfScope("case"), .endOfScope("default"):
                     return
                 case .endOfScope:
diff --git a/Tests/RulesTests.swift b/Tests/RulesTests.swift
index a1dd97e6..40f29709 100644
--- a/Tests/RulesTests.swift
+++ b/Tests/RulesTests.swift
@@ -6554,21 +6554,19 @@ class RulesTests: XCTestCase {
 
     func testSelfNotInsertedInParameterNames() {
         let input = """
-        func foo(a _: String) {}
-        class Bar {
+        class Foo {
             let a: String
 
-            func hoge() {
+            func bar() {
                 foo(a: a)
             }
         }
         """
         let output = """
-        func foo(a _: String) {}
-        class Bar {
+        class Foo {
             let a: String
 
-            func hoge() {
+            func bar() {
                 foo(a: self.a)
             }
         }