diff --git a/Tests/SourceKitLSPTests/ExecuteCommandTests.swift b/Tests/SourceKitLSPTests/ExecuteCommandTests.swift
index 1476f4625..5ffee9897 100644
--- a/Tests/SourceKitLSPTests/ExecuteCommandTests.swift
+++ b/Tests/SourceKitLSPTests/ExecuteCommandTests.swift
@@ -310,6 +310,7 @@ final class ExecuteCommandTests: XCTestCase {
 
   func testAttachedMacroExpansion() async throws {
     try await SkipUnless.canBuildMacroUsingSwiftSyntaxFromSourceKitLSPBuild()
+    try await SkipUnless.swiftPMSupportsExperimentalPrepareForIndexing()
 
     let files: [RelativeFileLocation: String] = [
       "MyMacros/MyMacros.swift": #"""