diff --git a/compiler-rt/test/fuzzer/fork-sigusr.test b/compiler-rt/test/fuzzer/fork-sigusr.test
index 4f796171fbd11..088e63cae4311 100644
--- a/compiler-rt/test/fuzzer/fork-sigusr.test
+++ b/compiler-rt/test/fuzzer/fork-sigusr.test
@@ -1,5 +1,6 @@
 # Check that libFuzzer honors SIGUSR1/SIGUSR2
 # Disabled on Windows which does not have SIGUSR1/SIGUSR2.
+REQUIRES: shell
 UNSUPPORTED: darwin, target={{.*windows.*}}, target=aarch64{{.*}}
 RUN: rm -rf %t
 RUN: mkdir -p %t
diff --git a/compiler-rt/test/fuzzer/merge-sigusr.test b/compiler-rt/test/fuzzer/merge-sigusr.test
index 762ae0d106d28..4e492775400b9 100644
--- a/compiler-rt/test/fuzzer/merge-sigusr.test
+++ b/compiler-rt/test/fuzzer/merge-sigusr.test
@@ -1,6 +1,7 @@
 # Check that libFuzzer honors SIGUSR1/SIGUSR2
 # FIXME: Disabled on Windows for now because of reliance on posix only features
 # (eg: export, "&", pkill).
+REQUIRES: shell
 UNSUPPORTED: darwin, target={{.*windows.*}}
 RUN: rm -rf %t
 RUN: mkdir -p %t
diff --git a/compiler-rt/test/fuzzer/sigint.test b/compiler-rt/test/fuzzer/sigint.test
index 0e239c3ce5385..ac482d79b8e28 100644
--- a/compiler-rt/test/fuzzer/sigint.test
+++ b/compiler-rt/test/fuzzer/sigint.test
@@ -1,4 +1,4 @@
-REQUIRES: msan
+REQUIRES: shell, msan
 UNSUPPORTED: target=arm{{.*}}
 
 # Check that libFuzzer exits gracefully under SIGINT with MSan.
diff --git a/compiler-rt/test/fuzzer/sigusr.test b/compiler-rt/test/fuzzer/sigusr.test
index c3d7adf8ea99b..c8a77ac63a6d7 100644
--- a/compiler-rt/test/fuzzer/sigusr.test
+++ b/compiler-rt/test/fuzzer/sigusr.test
@@ -1,5 +1,6 @@
 # FIXME: Disabled on Windows for now because of reliance on posix only features
 # (eg: export, "&", pkill).
+REQUIRES: shell
 UNSUPPORTED: darwin, target={{.*windows.*}}
 # Check that libFuzzer honors SIGUSR1/SIGUSR2
 RUN: rm -rf %t