diff --git a/test/Tooling/auto-detect-from-source-parent-of-cwd.cpp b/test/Tooling/auto-detect-from-source-parent-of-cwd.cpp
index 7a4f9af..9692edc 100644
--- a/test/Tooling/auto-detect-from-source-parent-of-cwd.cpp
+++ b/test/Tooling/auto-detect-from-source-parent-of-cwd.cpp
@@ -6,3 +6,5 @@
 
 // CHECK: C++ requires
 invalid;
+
+// REQUIRES: shell
diff --git a/test/Tooling/auto-detect-from-source-parent.cpp b/test/Tooling/auto-detect-from-source-parent.cpp
index cb5fd56..ea7eb15 100644
--- a/test/Tooling/auto-detect-from-source-parent.cpp
+++ b/test/Tooling/auto-detect-from-source-parent.cpp
@@ -6,3 +6,5 @@
 
 // CHECK: C++ requires
 invalid;
+
+// REQUIRES: shell
diff --git a/test/Tooling/auto-detect-from-source.cpp b/test/Tooling/auto-detect-from-source.cpp
index 40a2a1c..d8e82e7 100644
--- a/test/Tooling/auto-detect-from-source.cpp
+++ b/test/Tooling/auto-detect-from-source.cpp
@@ -6,3 +6,5 @@
 
 // CHECK: C++ requires
 invalid;
+
+// REQUIRES: shell