diff --git a/test/Frontend/module-alias-diags.swift b/test/Frontend/module-alias-diags.swift
index 8608ef0c53763..85837fdb9b852 100644
--- a/test/Frontend/module-alias-diags.swift
+++ b/test/Frontend/module-alias-diags.swift
@@ -1,5 +1,4 @@
 /// Test diagnostics with module aliasing.
-///
 /// Module 'Lib' imports module 'XLogging', and 'XLogging' is aliased 'AppleLogging'.
 
 // RUN: %empty-directory(%t)
diff --git a/test/SILOptimizer/global_init_with_empty.swift b/test/SILOptimizer/global_init_with_empty.swift
index 89175c35fa6ba..ba95cc89daef0 100644
--- a/test/SILOptimizer/global_init_with_empty.swift
+++ b/test/SILOptimizer/global_init_with_empty.swift
@@ -1,5 +1,5 @@
+// REQUIRES: rdar80475018
 // RUN: %target-swift-frontend  -primary-file %s -O -module-name=test -emit-ir | %FileCheck %s
-
 // Also do an end-to-end test.
 // RUN: %empty-directory(%t) 
 // RUN: %target-build-swift -O -module-name=test %s -o %t/a.out
diff --git a/validation-test/stdlib/HashingRandomization.swift b/validation-test/stdlib/HashingRandomization.swift
index 58dfafaf82bc9..c6f555d5df374 100644
--- a/validation-test/stdlib/HashingRandomization.swift
+++ b/validation-test/stdlib/HashingRandomization.swift
@@ -1,3 +1,4 @@
+// REQUIRES: rdar80475018
 // RUN: %empty-directory(%t)
 // RUN: %target-build-swift -Xfrontend -disable-access-control -module-name main %s -o %t/hash
 // RUN: %target-codesign %t/hash