Index: lib/Fuzzer/test/equivalence.test
===================================================================
--- lib/Fuzzer/test/equivalence.test
+++ lib/Fuzzer/test/equivalence.test
@@ -14,3 +14,5 @@
 RUN: sleep 3
 RUN: LLVMFuzzer-EquivalenceATest -timeout=1 -use_equivalence_server=EQUIV_TEST -runs=500000 2>&1
 RUN: kill -9 $APID
+
+REQUIRES: posix