diff --git a/libcxx/test/libcxx/language.support/has_aligned_alloc.compile.pass.cpp b/libcxx/test/libcxx/language.support/has_aligned_alloc.compile.pass.cpp
--- a/libcxx/test/libcxx/language.support/has_aligned_alloc.compile.pass.cpp
+++ b/libcxx/test/libcxx/language.support/has_aligned_alloc.compile.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // Make sure TEST_HAS_ALIGNED_ALLOC (defined by the test suite) and
 // _LIBCPP_HAS_ALIGNED_ALLOC (defined by libc++) stay in sync.
 
diff --git a/libcxx/test/std/depr/depr.c.headers/stdlib_h.pass.cpp b/libcxx/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
--- a/libcxx/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
+++ b/libcxx/test/std/depr/depr.c.headers/stdlib_h.pass.cpp
@@ -8,8 +8,6 @@
 
 // test <stdlib.h>
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 #include <stdlib.h>
 #include <type_traits>
 #include <cassert>
diff --git a/libcxx/test/std/language.support/support.runtime/cstdlib.pass.cpp b/libcxx/test/std/language.support/support.runtime/cstdlib.pass.cpp
--- a/libcxx/test/std/language.support/support.runtime/cstdlib.pass.cpp
+++ b/libcxx/test/std/language.support/support.runtime/cstdlib.pass.cpp
@@ -8,8 +8,6 @@
 
 // test <cstdlib>
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 #include <cstdlib>
 #include <type_traits>
 #include <cassert>
diff --git a/libcxx/test/support/test_macros.h b/libcxx/test/support/test_macros.h
--- a/libcxx/test/support/test_macros.h
+++ b/libcxx/test/support/test_macros.h
@@ -209,7 +209,6 @@
 #  elif defined(_WIN32)
 #    if defined(_MSC_VER) && !defined(__MINGW32__)
 #      define TEST_HAS_QUICK_EXIT
-#      define TEST_HAS_ALIGNED_ALLOC
 #      define TEST_HAS_TIMESPEC_GET
 #    endif
 #  elif defined(__APPLE__)