diff --git a/peekaboo-cli/Tests/peekabooTests/JSONOutputTests.swift b/peekaboo-cli/Tests/peekabooTests/JSONOutputTests.swift
index a98fad8..ca44c71 100644
--- a/peekaboo-cli/Tests/peekabooTests/JSONOutputTests.swift
+++ b/peekaboo-cli/Tests/peekabooTests/JSONOutputTests.swift
@@ -283,7 +283,7 @@ struct JSONOutputTests {
 
         for errorCode in errorCodes {
             #expect(!errorCode.rawValue.isEmpty)
-            #expect(errorCode.rawValue.allSatisfy(\.isASCII))
+            #expect(errorCode.rawValue.allSatisfy { $0.isASCII })
         }
     }
 }