diff --git a/Sources/SKTestSupport/SwiftPMTestProject.swift b/Sources/SKTestSupport/SwiftPMTestProject.swift
index bf7d2a39f..b201e769a 100644
--- a/Sources/SKTestSupport/SwiftPMTestProject.swift
+++ b/Sources/SKTestSupport/SwiftPMTestProject.swift
@@ -100,6 +100,7 @@ package class SwiftPMTestProject: MultiFileTestProject {
         "SwiftSyntaxBuilder",
         "SwiftSyntaxMacroExpansion",
         "SwiftSyntaxMacros",
+        "_SwiftSyntaxCShims",
       ]
 
       var objectFiles: [String] = []