diff --git a/test/Incremental/CrossModule/external-cascade.swift b/test/Incremental/CrossModule/external-cascade.swift
index 83407e1573124..993493a092157 100644
--- a/test/Incremental/CrossModule/external-cascade.swift
+++ b/test/Incremental/CrossModule/external-cascade.swift
@@ -4,6 +4,9 @@
 // rdar://problem/70012853
 // XFAIL: OS=windows-msvc
 
+// rdar://70175753
+// REQUIRES: rdar70175753
+
 //
 // This test establishes a chain of modules that all depend on a set of
 // bridging headers. This test ensures that changes to external dependencies -
diff --git a/test/Incremental/CrossModule/linear.swift b/test/Incremental/CrossModule/linear.swift
index 488c715320159..084392d1c88c8 100644
--- a/test/Incremental/CrossModule/linear.swift
+++ b/test/Incremental/CrossModule/linear.swift
@@ -4,6 +4,9 @@
 // rdar://problem/70012853
 // XFAIL: OS=windows-msvc
 
+// rdar://70175753
+// REQUIRES: rdar70175753
+
 //
 // This test establishes a "linear" chain of modules that import one another
 // and ensures that a cross-module incremental build does not needlessly
diff --git a/test/Incremental/CrossModule/transitive.swift b/test/Incremental/CrossModule/transitive.swift
index 83f354f082ed9..8c5d29b096c01 100644
--- a/test/Incremental/CrossModule/transitive.swift
+++ b/test/Incremental/CrossModule/transitive.swift
@@ -4,6 +4,9 @@
 // rdar://problem/70012853
 // XFAIL: OS=windows-msvc
 
+// rdar://70175753
+// REQUIRES: rdar70175753
+
 //
 // This test establishes a "transitive" chain of modules that import one another
 // and ensures that a cross-module incremental build rebuilds all modules