diff --git a/libcxx/test/libcxx/utilities/assert.exception_guard.no_exceptions.pass.cpp b/libcxx/test/libcxx/utilities/assert.exception_guard.no_exceptions.pass.cpp
--- a/libcxx/test/libcxx/utilities/assert.exception_guard.no_exceptions.pass.cpp
+++ b/libcxx/test/libcxx/utilities/assert.exception_guard.no_exceptions.pass.cpp
@@ -10,7 +10,7 @@
 
 // REQUIRES: has-unix-headers
 // XFAIL: availability-verbose_abort-missing
-// ADDITIONAL_COMPILE_FLAGS: -fno-exceptions -D_LIBCPP_ENABLE_ASSERTIONS
+// ADDITIONAL_COMPILE_FLAGS: -fno-exceptions -D_LIBCPP_ENABLE_ASSERTIONS=1
 
 // ADDITIONAL_COMPILE_FLAGS: -Wno-private-header
 
diff --git a/libcxx/test/libcxx/utilities/exception_guard.no_exceptions.pass.cpp b/libcxx/test/libcxx/utilities/exception_guard.no_exceptions.pass.cpp
--- a/libcxx/test/libcxx/utilities/exception_guard.no_exceptions.pass.cpp
+++ b/libcxx/test/libcxx/utilities/exception_guard.no_exceptions.pass.cpp
@@ -8,7 +8,7 @@
 
 // UNSUPPORTED: c++03
 
-// ADDITIONAL_COMPILE_FLAGS: -fno-exceptions -D_LIBCPP_ENABLE_ASSERTIONS
+// ADDITIONAL_COMPILE_FLAGS: -fno-exceptions
 
 #include <utility>