   }
 }
 
+if #available(SwiftStdlib 5.5, *) {
+  DemangleToMetadataTests.test("Concurrency standard substitutions") {
+    expectEqual(TaskGroup<Int>.self, _typeByName("ScGySiG")!)
+  }
+}
 
 runAllTests()
 

// RUN: %empty-directory(%t)
// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency -parse-stdlib %s -module-name main -o %t/a.out
// RUN: %target-codesign %t/a.out
// RUN: %target-run %t/a.out
// REQUIRES: executable_test


import Swift
import StdlibUnittest
import _Concurrency

let DemangleToMetadataTests = TestSuite("DemangleToMetadata")

