diff --git a/src/library_path.js b/src/library_path.js
index 5daa4e646198f..21c2e12982525 100644
--- a/src/library_path.js
+++ b/src/library_path.js
@@ -6,7 +6,14 @@
 
 mergeInto(LibraryManager.library, {
   $PATH: {
-    isAbs: (path) => path.charAt(0) === '/',
+    isAbs: (path) => {
+#if ENVIRONMENT_MAY_BE_NODE
+      if (typeof ENVIRONMENT_IS_NODE != 'undefined' && ENVIRONMENT_IS_NODE && typeof nodePath !== 'undefined' && nodePath.isAbsolute !== undefined) {
+          return nodePath.isAbsolute(path);
+      }
+#endif
+      return path.charAt(0) === '/';
+    },
     // split a filename into [root, dir, basename, ext], unix version
     // 'root' is just a slash, or nothing.
     splitPath: (filename) => {
@@ -37,6 +44,14 @@ mergeInto(LibraryManager.library, {
       return parts;
     },
     normalize: (path) => {
+#if ENVIRONMENT_MAY_BE_NODE
+      if (typeof ENVIRONMENT_IS_NODE != 'undefined' && ENVIRONMENT_IS_NODE && typeof nodePath !== 'undefined' && nodePath.normalize !== undefined) {
+        const normalized = nodePath.normalize(path);
+        if (normalized) {
+            return normalized.replace(/\\/g, '/');
+        }
+    }
+#endif
       var isAbsolute = PATH.isAbs(path),
           trailingSlash = path.substr(-1) === '/';
       // Normalize the path
diff --git a/test/common.py b/test/common.py
index b4155c37ed334..9d516963ff20e 100644
--- a/test/common.py
+++ b/test/common.py
@@ -32,7 +32,7 @@
 from tools.shared import TEMP_DIR, EMCC, EMXX, DEBUG, EMCONFIGURE, EMCMAKE
 from tools.shared import EMSCRIPTEN_TEMP_DIR
 from tools.shared import get_canonical_temp_dir, path_from_root
-from tools.utils import MACOS, WINDOWS, read_file, read_binary, write_file, write_binary, exit_with_error
+from tools.utils import MACOS, WINDOWS, LINUX, read_file, read_binary, write_file, write_binary, exit_with_error
 from tools import shared, line_endings, building, config, utils
 
 logger = logging.getLogger('common')
@@ -154,6 +154,13 @@ def no_mac(note=''):
   return lambda f: f
 
 
+def no_linux(note=''):
+  assert not callable(note)
+  if LINUX:
+    return unittest.skip(note)
+  return lambda f: f
+
+
 def no_windows(note=''):
   assert not callable(note)
   if WINDOWS:
diff --git a/test/dirent/test_readdir_windows.c b/test/dirent/test_readdir_windows.c
new file mode 100644
index 0000000000000..180981ab7a9d0
--- /dev/null
+++ b/test/dirent/test_readdir_windows.c
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2013 The Emscripten Authors.  All rights reserved.
+ * Emscripten is available under two separate licenses, the MIT license and the
+ * University of Illinois/NCSA Open Source License.  Both these licenses can be
+ * found in the LICENSE file.
+ */
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <limits.h>
+
+void cleanup();
+
+#define ASSERT_WITH_CLEANUP(cond) if (!(cond)) { cleanup(); assert(cond); }
+
+#define CHECK(cond) if (!(cond)) { printf("errno: %s\n", strerror(errno)); ASSERT_WITH_CLEANUP(cond); }
+
+static void create_file(const char *path, const char *buffer, int mode) {
+  int fd = open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
+  CHECK(fd >= 0);
+
+  int err = write(fd, buffer, sizeof(char) * strlen(buffer));
+  ASSERT_WITH_CLEANUP(err ==  (sizeof(char) * strlen(buffer)));
+
+  close(fd);
+}
+
+char windir[PATH_MAX] = {0};
+char tempdir[PATH_MAX] = {0};
+char testtmp[PATH_MAX] = {0};
+
+void setup() {
+  sprintf(testtmp, "%s\\testtmp", tempdir);
+  int err;
+  err = mkdir(testtmp, 0777);  // can't call it tmp, that already exists
+  CHECK(!err);
+  chdir(testtmp);
+  err = mkdir("nocanread", 0111);
+  CHECK(!err);
+  err = mkdir("foobar", 0777);
+  CHECK(!err);
+  create_file("foobar\\file.txt", "ride into the danger zone", 0666);
+}
+
+void cleanup() {
+  rmdir("nocanread");
+  unlink("foobar\\file.txt");
+  rmdir("foobar");
+  chdir("..");
+  rmdir("testtmp");
+}
+
+void test() {
+  int err;
+  long loc, loc2;
+  DIR *dir;
+  struct dirent *ent;
+  struct dirent ent_r;
+  struct dirent *result;
+  int i;
+
+  // check bad opendir input
+  dir = opendir("noexist");
+  ASSERT_WITH_CLEANUP(!dir);
+  ASSERT_WITH_CLEANUP(errno == ENOENT);
+  char filepath[PATH_MAX] = {0};
+  sprintf(filepath, "%s\\foobar\\file.txt", testtmp);
+  dir = opendir(filepath);
+  ASSERT_WITH_CLEANUP(!dir);
+
+  //
+  // do a normal read with readdir
+  //
+  char dirpath[PATH_MAX] = {0};
+  sprintf(dirpath, "%s\\foobar", testtmp);
+  dir = opendir(dirpath);
+  ASSERT_WITH_CLEANUP(dir);
+  int seen[3] = { 0, 0, 0 };
+  for (i = 0; i < 3; i++) {
+    errno = 0;
+    ent = readdir(dir);
+    if (ent) {
+      fprintf(stderr, "%d file: %s (%d : %lu)\n", i, ent->d_name, ent->d_reclen, sizeof(*ent));
+    } else {
+      fprintf(stderr, "ent: %p, errno: %d\n", ent, errno);
+      ASSERT_WITH_CLEANUP(ent);
+    }
+    ASSERT_WITH_CLEANUP(ent->d_reclen == sizeof(*ent));
+    if (!seen[0] && !strcmp(ent->d_name, ".")) {
+      ASSERT_WITH_CLEANUP(ent->d_type & DT_DIR);
+      seen[0] = 1;
+      continue;
+    }
+    if (!seen[1] && !strcmp(ent->d_name, "..")) {
+      ASSERT_WITH_CLEANUP(ent->d_type & DT_DIR);
+      seen[1] = 1;
+      continue;
+    }
+    if (!seen[2] && !strcmp(ent->d_name, "file.txt")) {
+      ASSERT_WITH_CLEANUP(ent->d_type & DT_REG);
+      seen[2] = 1;
+      continue;
+    }
+    ASSERT_WITH_CLEANUP(0 && "odd filename");
+  }
+  ent = readdir(dir);
+  if (ent) printf("surprising ent: %p : %s\n", ent, ent->d_name);
+  ASSERT_WITH_CLEANUP(!ent);
+
+  // test rewinddir
+  rewinddir(dir);
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+
+  // test seek / tell
+  rewinddir(dir);
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  loc = telldir(dir);
+  ASSERT_WITH_CLEANUP(loc >= 0);
+  //printf("loc=%d\n", loc);
+  loc2 = ent->d_off;
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  char name_at_loc[1024];
+  strcpy(name_at_loc, ent->d_name);
+  //printf("name_at_loc: %s\n", name_at_loc);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  seekdir(dir, loc);
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  //printf("check: %s / %s\n", ent->d_name, name_at_loc);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, name_at_loc));
+
+  seekdir(dir, loc2);
+  ent = readdir(dir);
+  ASSERT_WITH_CLEANUP(ent && ent->d_ino);
+  //printf("check: %s / %s\n", ent->d_name, name_at_loc);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, name_at_loc));
+
+  //
+  // do a normal read with readdir_r
+  //
+  rewinddir(dir);
+  err = readdir_r(dir, &ent_r, &result);
+  ASSERT_WITH_CLEANUP(!err);
+  ASSERT_WITH_CLEANUP(&ent_r == result);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  err = readdir_r(dir, &ent_r, &result);
+  ASSERT_WITH_CLEANUP(!err);
+  ASSERT_WITH_CLEANUP(&ent_r == result);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  err = readdir_r(dir, &ent_r, &result);
+  ASSERT_WITH_CLEANUP(!err);
+  ASSERT_WITH_CLEANUP(&ent_r == result);
+  ASSERT_WITH_CLEANUP(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "file.txt"));
+  err = readdir_r(dir, &ent_r, &result);
+  ASSERT_WITH_CLEANUP(!err);
+  ASSERT_WITH_CLEANUP(!result);
+
+  err = closedir(dir);
+  ASSERT_WITH_CLEANUP(!err);
+
+  // Read the windir and verify
+  dir = opendir(windir);
+  ASSERT_WITH_CLEANUP(dir);
+  err = closedir(dir);
+  ASSERT_WITH_CLEANUP(!err);
+
+  puts("success");
+}
+
+void test_scandir() {
+  struct dirent **namelist;
+  int n;
+
+  n = scandir(".", &namelist, NULL, alphasort);
+  printf("n: %d\n", n);
+  if (n < 0)
+    return;
+  else {
+    while (n--) {
+      printf("name: %s\n", namelist[n]->d_name);
+      free(namelist[n]);
+    }
+    free(namelist);
+  }
+}
+
+int main(int argc, char * argv[]) {
+  if (argc < 3) {
+    printf("test_readdir_windows args: %%WINDIR%% %%TEMP%%\n");
+    return -1;
+  }
+  strcpy(windir, argv[1]);
+  strcpy(tempdir, argv[2]);
+  // atexit(cleanup); Doesn't work on windows
+  signal(SIGABRT, cleanup);
+  setup();
+  test();
+  test_scandir();
+  cleanup();
+
+  return EXIT_SUCCESS;
+}
diff --git a/test/dirent/test_readdir_windows.out b/test/dirent/test_readdir_windows.out
new file mode 100644
index 0000000000000..a7dd1b3e5933d
--- /dev/null
+++ b/test/dirent/test_readdir_windows.out
@@ -0,0 +1,9 @@
+0 file: . (280 : 280)
+1 file: .. (280 : 280)
+2 file: file.txt (280 : 280)
+success
+n: 4
+name: nocanread
+name: foobar
+name: ..
+name: .
diff --git a/test/test_core.py b/test/test_core.py
index 8e34ba996d674..0f0ace25dbfde 100644
--- a/test/test_core.py
+++ b/test/test_core.py
@@ -25,7 +25,7 @@
 from tools import shared, building, config, webassembly
 import common
 from common import RunnerCore, path_from_root, requires_native_clang, test_file, create_file
-from common import skip_if, needs_dylink, no_windows, no_mac, is_slow_test, parameterized
+from common import skip_if, needs_dylink, no_windows, no_mac, no_linux, is_slow_test, parameterized
 from common import env_modify, with_env_modify, disabled, node_pthreads, also_with_wasm_bigint
 from common import read_file, read_binary, requires_v8, requires_node
 from common import NON_ZERO, WEBIDL_BINDER, EMBUILDER, PYTHON
@@ -5655,6 +5655,14 @@ def test_fileno(self):
   def test_readdir(self):
     self.do_run_in_out_file_test('dirent/test_readdir.c')
 
+  @no_mac("uses windows only paths for testing")
+  @no_linux("uses windows only paths for testing")
+  @also_with_noderawfs
+  def test_readdir_windows(self):
+    self.require_node()
+    self.emcc_args += ['-sNODERAWFS']
+    self.do_run_in_out_file_test('dirent/test_readdir_windows.c', args=[os.environ["WINDIR"], os.environ["TEMP"]])
+
   @also_with_wasm_bigint
   def test_readdir_empty(self):
     self.do_run_in_out_file_test('dirent/test_readdir_empty.c')