diff --git a/compiler-rt/test/ubsan/TestCases/Misc/Linux/sigaction.cpp b/compiler-rt/test/ubsan/TestCases/Misc/Linux/sigaction.cpp
--- a/compiler-rt/test/ubsan/TestCases/Misc/Linux/sigaction.cpp
+++ b/compiler-rt/test/ubsan/TestCases/Misc/Linux/sigaction.cpp
@@ -1,4 +1,4 @@
-// RUN: %clangxx -fsanitize=undefined -shared-libsan %s -o %t && %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx -shared-libsan %s -o %t && %run %t 2>&1 | FileCheck %s
 
 // Ensure ubsan runtime/interceptors are lazily initialized if called early.