diff --git a/compiler-rt/test/asan/TestCases/Linux/allocator_oom_test.cpp b/compiler-rt/test/asan/TestCases/Linux/allocator_oom_test.cpp
index b096624a7f95b..f60a6a4ef79e6 100644
--- a/compiler-rt/test/asan/TestCases/Linux/allocator_oom_test.cpp
+++ b/compiler-rt/test/asan/TestCases/Linux/allocator_oom_test.cpp
@@ -31,7 +31,7 @@
 // ASan shadow memory on s390 is too large for this test.
 // AArch64 bots fail on this test.
 // TODO(alekseys): Android lit do not run ulimit on device.
-// REQUIRES: shadow-scale-3
+// REQUIRES: shell, shadow-scale-3
 // UNSUPPORTED: android, target={{(s390|aarch64|powerpc64le).*}}
 
 #include <stdlib.h>
diff --git a/compiler-rt/test/asan/TestCases/Posix/deep_call_stack.cpp b/compiler-rt/test/asan/TestCases/Posix/deep_call_stack.cpp
index e6e82a4757205..37aa7b11a231a 100644
--- a/compiler-rt/test/asan/TestCases/Posix/deep_call_stack.cpp
+++ b/compiler-rt/test/asan/TestCases/Posix/deep_call_stack.cpp
@@ -1,4 +1,5 @@
 // Check that UAR mode can handle very deep recusrion.
+// REQUIRES: shell
 // RUN: %clangxx_asan -O2 %s -o %t
 // RUN: ulimit -s 4096
 // RUN: %env_asan_opts=detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s
diff --git a/compiler-rt/test/fuzzer/merge-posix.test b/compiler-rt/test/fuzzer/merge-posix.test
index 9fece647ca60b..2721668fb9706 100644
--- a/compiler-rt/test/fuzzer/merge-posix.test
+++ b/compiler-rt/test/fuzzer/merge-posix.test
@@ -1,5 +1,5 @@
+REQUIRES: shell
 XFAIL: ios
-UNSUPPORTED: target={{.*windows.*}}
 RUN: %cpp_compiler %S/FullCoverageSetTest.cpp -o %t-FullCoverageSetTest
 
 RUN: rm -rf  %tmp/T1 %tmp/T2
diff --git a/compiler-rt/test/fuzzer/ulimit.test b/compiler-rt/test/fuzzer/ulimit.test
index 223f2ac9bb6e2..e330a97cc07c5 100644
--- a/compiler-rt/test/fuzzer/ulimit.test
+++ b/compiler-rt/test/fuzzer/ulimit.test
@@ -1,5 +1,4 @@
-# FIXME: Disabled on Windows for now because Windows has no ulimit command.
-UNSUPPORTED: target={{.*windows.*}}
+REQUIRES: shell
 RUN: %cpp_compiler %S/SimpleTest.cpp -o %t-SimpleTest
 RUN: ulimit -s 1000
 RUN: not %run %t-SimpleTest
diff --git a/compiler-rt/test/hwasan/TestCases/print-memory-usage.c b/compiler-rt/test/hwasan/TestCases/print-memory-usage.c
index 2c89d4e70ebc7..13652fbd921b0 100644
--- a/compiler-rt/test/hwasan/TestCases/print-memory-usage.c
+++ b/compiler-rt/test/hwasan/TestCases/print-memory-usage.c
@@ -1,4 +1,5 @@
 // Tests __hwasan_print_memory_usage.
+// REQUIRES: shell
 // RUN: %clang_hwasan %s -o %t
 // RUN: ulimit -s 1000
 // RUN: %run %t 2>&1 | FileCheck %s
diff --git a/compiler-rt/test/msan/Linux/reexec_unlimited_stack.cpp b/compiler-rt/test/msan/Linux/reexec_unlimited_stack.cpp
index 61492ec34533f..8dee27047470e 100644
--- a/compiler-rt/test/msan/Linux/reexec_unlimited_stack.cpp
+++ b/compiler-rt/test/msan/Linux/reexec_unlimited_stack.cpp
@@ -1,5 +1,6 @@
 // MSAN re-execs on unlimited stacks. We use that to verify ReExec() uses the
 // right path.
+// REQUIRES: shell
 // RUN: %clangxx_msan -O0 %s -o %t && ulimit -s unlimited && %run %t | FileCheck %s
 
 #include <stdio.h>