diff --git a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.append.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.append.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.append.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.append.pass.cpp
@@ -29,6 +29,12 @@
 #include <string_view>
 #include <cassert>
 
+#ifdef _WIN32
+// On Windows, charset conversions cause allocations in the path class in
+// cases where no allocations are done on other platforms.
+#define DISABLE_NEW_COUNT
+#endif
+
 #include "test_macros.h"
 #include "test_iterators.h"
 #include "count_new.h"
diff --git a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.assign/source.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.assign/source.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.assign/source.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.assign/source.pass.cpp
@@ -29,6 +29,12 @@
 #include <string_view>
 #include <cassert>
 
+#ifdef _WIN32
+// On Windows, charset conversions cause allocations in the path class in
+// cases where no allocations are done on other platforms.
+#define DISABLE_NEW_COUNT
+#endif
+
 #include "test_macros.h"
 #include "test_iterators.h"
 #include "count_new.h"
diff --git a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.concat.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.concat.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.concat.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.concat.pass.cpp
@@ -36,6 +36,12 @@
 #include <string_view>
 #include <cassert>
 
+#ifdef _WIN32
+// On Windows, charset conversions cause allocations in the path class in
+// cases where no allocations are done on other platforms.
+#define DISABLE_NEW_COUNT
+#endif
+
 #include "test_macros.h"
 #include "test_iterators.h"
 #include "count_new.h"
diff --git a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.generic.obs/generic_string_alloc.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.generic.obs/generic_string_alloc.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.generic.obs/generic_string_alloc.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.generic.obs/generic_string_alloc.pass.cpp
@@ -24,6 +24,12 @@
 #include <type_traits>
 #include <cassert>
 
+#ifdef _WIN32
+// On Windows, charset conversions cause allocations in the path class in
+// cases where no allocations are done on other platforms.
+#define DISABLE_NEW_COUNT
+#endif
+
 #include "test_macros.h"
 #include "test_iterators.h"
 #include "count_new.h"
diff --git a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.native.obs/string_alloc.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.native.obs/string_alloc.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.path/path.member/path.native.obs/string_alloc.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/path.member/path.native.obs/string_alloc.pass.cpp
@@ -25,6 +25,12 @@
 #include <type_traits>
 #include <cassert>
 
+#ifdef _WIN32
+// On Windows, charset conversions cause allocations in the path class in
+// cases where no allocations are done on other platforms.
+#define DISABLE_NEW_COUNT
+#endif
+
 #include "test_macros.h"
 #include "test_iterators.h"
 #include "count_new.h"