diff --git a/Tests/ArgumentParserUnitTests/HelpGenerationTests.swift b/Tests/ArgumentParserUnitTests/HelpGenerationTests.swift
index f3a11abc9..cf1774acc 100644
--- a/Tests/ArgumentParserUnitTests/HelpGenerationTests.swift
+++ b/Tests/ArgumentParserUnitTests/HelpGenerationTests.swift
@@ -16,7 +16,7 @@ import ArgumentParserTestHelpers
 final class HelpGenerationTests: XCTestCase {
 }
 
-extension URL: ExpressibleByArgument {
+extension Foundation.URL: ArgumentParser.ExpressibleByArgument {
   public init?(argument: String) {
     guard let url = URL(string: argument) else {
       return nil
diff --git a/Tests/ArgumentParserUnitTests/SplitArgumentTests.swift b/Tests/ArgumentParserUnitTests/SplitArgumentTests.swift
index 5b1c1c2c9..ffd61613a 100644
--- a/Tests/ArgumentParserUnitTests/SplitArgumentTests.swift
+++ b/Tests/ArgumentParserUnitTests/SplitArgumentTests.swift
@@ -13,7 +13,7 @@ import XCTest
 @testable import ArgumentParser
 import ArgumentParserTestHelpers
 
-extension SplitArguments.InputIndex: ExpressibleByIntegerLiteral {
+extension ArgumentParser.SplitArguments.InputIndex: Swift.ExpressibleByIntegerLiteral {
   public init(integerLiteral value: Int) {
     self.init(rawValue: value)
   }
diff --git a/Tools/generate-manual/Extensions/Date+ExpressibleByArgument.swift b/Tools/generate-manual/Extensions/Date+ExpressibleByArgument.swift
index cf1709783..0d0f5ed08 100644
--- a/Tools/generate-manual/Extensions/Date+ExpressibleByArgument.swift
+++ b/Tools/generate-manual/Extensions/Date+ExpressibleByArgument.swift
@@ -12,7 +12,7 @@
 import ArgumentParser
 import Foundation
 
-extension Date: ExpressibleByArgument {
+extension Foundation.Date: ArgumentParser.ExpressibleByArgument {
   // parsed as `yyyy-mm-dd`
   public init?(argument: String) {
     // ensure the input argument is composed of exactly 3 components separated