 }
 
 StringTests.test("stringCoreExtensibility")
-  .skip(.LinuxAny(reason: "Foundation dependency"))
+  .skip(.NativeRuntime("Foundation dependency"))
   .code {
 #if _runtime(_ObjC)
   let ascii = UTF16.CodeUnit(UnicodeScalar("X").value)

}

StringTests.test("stringCoreReserve")
  .skip(.LinuxAny(reason: "Foundation dependency"))
  .code {
#if _runtime(_ObjC)
  for k in 0...5 {

}

StringTests.test("hasPrefix")
  .skip(.NativeRuntime("String.hasPrefix undefined without _runtime(_ObjC)"))
  .code {
#if _runtime(_ObjC)
  expectFalse("".hasPrefix(""))
