diff --git a/src/file.js.c b/src/file.js.c
index 1236919d..a1dc7a14 100644
--- a/src/file.js.c
+++ b/src/file.js.c
@@ -15,7 +15,7 @@
 #endif
 
 static JSValue _file_make_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
-static JSValue _file_read_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
+static JSValue _file_remove_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _file_read_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _file_rename_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _file_stat(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
@@ -39,13 +39,11 @@ void tf_file_register(JSContext* context)
 	JS_SetPropertyStr(context, global, "File", file);
 	JS_SetPropertyStr(context, file, "readFile", JS_NewCFunction(context, _file_read_file, "readFile", 1));
 	JS_SetPropertyStr(context, file, "writeFile", JS_NewCFunction(context, _file_write_file, "writeFile", 2));
-
-	/* TODO: async */
 	JS_SetPropertyStr(context, file, "makeDirectory", JS_NewCFunction(context, _file_make_directory, "makeDirectory", 1));
-	JS_SetPropertyStr(context, file, "readDirectory", JS_NewCFunction(context, _file_read_directory, "readDirectory", 1));
+	JS_SetPropertyStr(context, file, "removeDirectory", JS_NewCFunction(context, _file_remove_directory, "removeDirectory", 1));
+	JS_SetPropertyStr(context, file, "unlinkFile", JS_NewCFunction(context, _file_unlink_file, "unlinkFile", 1));
 	JS_SetPropertyStr(context, file, "renameFile", JS_NewCFunction(context, _file_rename_file, "renameFile", 2));
 	JS_SetPropertyStr(context, file, "stat", JS_NewCFunction(context, _file_stat, "stat", 1));
-	JS_SetPropertyStr(context, file, "unlinkFile", JS_NewCFunction(context, _file_unlink_file, "unlinkFile", 1));
 	JS_FreeValue(context, global);
 }
 
@@ -204,7 +202,7 @@ static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int a
 		JS_FreeCString(context, (const char*)buffer);
 	}
 
-	int result = uv_fs_open(tf_task_get_loop(task), req, file_name, UV_FS_O_CREAT | UV_FS_O_WRONLY, 0755, _file_write_open_callback);
+	int result = uv_fs_open(tf_task_get_loop(task), req, file_name, UV_FS_O_CREAT | UV_FS_O_WRONLY, 0644, _file_write_open_callback);
 	if (result < 0)
 	{
 		tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, uv_strerror(result)));
@@ -213,63 +211,63 @@ static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int a
 	return promise_value;
 }
 
+static void _file_async_callback(uv_fs_t* req)
+{
+	uv_fs_req_cleanup(req);
+	tf_task_t* task = req->loop->data;
+	JSContext* context = tf_task_get_context(task);
+	promiseid_t promise = (promiseid_t)(intptr_t)req->data;
+	if (req->result == 0)
+	{
+		tf_task_resolve_promise(task, promise, JS_NewInt32(context, req->result));
+	}
+	else
+	{
+		tf_task_reject_promise(task, promise, JS_NewInt32(context, req->result));
+	}
+	free(req);
+}
+
 static JSValue _file_rename_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
 {
 	void* task = JS_GetContextOpaque(context);
-	const char* oldName = JS_ToCString(context, argv[0]);
-	const char* newName = JS_ToCString(context, argv[1]);
-	uv_fs_t req;
-	int result = uv_fs_rename(tf_task_get_loop(task), &req, oldName, newName, 0);
-	JS_FreeCString(context, oldName);
-	JS_FreeCString(context, newName);
-	return JS_NewInt32(context, result);
+	const char* old_name = JS_ToCString(context, argv[0]);
+	const char* new_name = JS_ToCString(context, argv[1]);
+	promiseid_t promise = tf_task_allocate_promise(task);
+	JSValue promise_value = tf_task_get_promise(task, promise);
+	uv_fs_t* req = malloc(sizeof(uv_fs_t));
+	*req = (uv_fs_t)
+	{
+		.data = (void*)(intptr_t)promise,
+	};
+	int result = uv_fs_rename(tf_task_get_loop(task), req, old_name, new_name,_file_async_callback);
+	JS_FreeCString(context, old_name);
+	JS_FreeCString(context, new_name);
+	if (result < 0)
+	{
+		tf_task_reject_promise(task, promise, JS_NewInt32(context, result));
+	}
+	return promise_value;
 }
 
 static JSValue _file_unlink_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
 {
 	void* task = JS_GetContextOpaque(context);
-	const char* fileName = JS_ToCString(context, argv[0]);
-	uv_fs_t req;
-	int result = uv_fs_unlink(tf_task_get_loop(task), &req, fileName, 0);
-	JS_FreeCString(context, fileName);
-	return JS_NewInt32(context, result);
-}
-
-static JSValue _file_read_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
-{
-	const char* directory = JS_ToCString(context, argv[0]);
-	JSValue array = JS_NewArray(context);
-
-#ifdef _WIN32
-	WIN32_FIND_DATA find;
-	std::string pattern = directory;
-	pattern += "\\*";
-	HANDLE handle = FindFirstFile(pattern.c_str(), &find);
-	if (handle != INVALID_HANDLE_VALUE)
+	const char* file_name = JS_ToCString(context, argv[0]);
+	promiseid_t promise = tf_task_allocate_promise(task);
+	JSValue promise_value = tf_task_get_promise(task, promise);
+	uv_fs_t* req = malloc(sizeof(uv_fs_t));
+	*req = (uv_fs_t)
 	{
-		int index = 0;
-		do {
-			JS_SetPropertyUint32(context, array, index++, JS_NewString(context, find.cFileName));
-		} while (FindNextFile(handle, &find) != 0);
-		FindClose(handle);
-	}
-#else
-	DIR* dir = opendir(directory);
-	if (dir)
+		.data = (void*)(intptr_t)promise,
+	};
+	int result = uv_fs_unlink(tf_task_get_loop(task), req, file_name, _file_async_callback);
+	JS_FreeCString(context, file_name);
+	if (result < 0)
 	{
-		uint32_t index = 0;
-		struct dirent* entry = readdir(dir);
-		while (entry)
-		{
-			JS_SetPropertyUint32(context, array, index++, JS_NewString(context, entry->d_name));
-			entry = readdir(dir);
-		}
-		closedir(dir);
+		tf_task_reject_promise(task, promise, JS_NewInt32(context, result));
 	}
-#endif
-
-	JS_FreeCString(context, directory);
-	return array;
+	return promise_value;
 }
 
 JSValue _file_make_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
@@ -277,10 +275,41 @@ JSValue _file_make_directory(JSContext* context, JSValueConst this_val, int argc
 	void* task = JS_GetContextOpaque(context);
 	const char* directory = JS_ToCString(context, argv[0]);
 
-	uv_fs_t req;
-	int result = uv_fs_mkdir(tf_task_get_loop(task), &req, directory, 0755, 0);
+	promiseid_t promise = tf_task_allocate_promise(task);
+	JSValue promise_value = tf_task_get_promise(task, promise);
+	uv_fs_t* req = malloc(sizeof(uv_fs_t));
+	*req = (uv_fs_t)
+	{
+		.data = (void*)(intptr_t)promise,
+	};
+	int result = uv_fs_mkdir(tf_task_get_loop(task), req, directory, 0755, _file_async_callback);
 	JS_FreeCString(context, directory);
-	return JS_NewInt32(context, result);
+	if (result < 0)
+	{
+		tf_task_reject_promise(task, promise, JS_NewInt32(context, result));
+	}
+	return promise_value;
+}
+
+JSValue _file_remove_directory(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+{
+	void* task = JS_GetContextOpaque(context);
+	const char* directory = JS_ToCString(context, argv[0]);
+
+	promiseid_t promise = tf_task_allocate_promise(task);
+	JSValue promise_value = tf_task_get_promise(task, promise);
+	uv_fs_t* req = malloc(sizeof(uv_fs_t));
+	*req = (uv_fs_t)
+	{
+		.data = (void*)(intptr_t)promise,
+	};
+	int result = uv_fs_rmdir(tf_task_get_loop(task), req, directory, _file_async_callback);
+	JS_FreeCString(context, directory);
+	if (result < 0)
+	{
+		tf_task_reject_promise(task, promise, JS_NewInt32(context, result));
+	}
+	return promise_value;
 }
 
 JSValue _file_stat(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
diff --git a/src/tests.c b/src/tests.c
index cb8344cb..b5f76717 100644
--- a/src/tests.c
+++ b/src/tests.c
@@ -496,7 +496,6 @@ static void _test_file(const tf_test_options_t* options)
 	fprintf(file,
 		"'use strict';\n"
 		"File.readFile('out/test.js').then(function(data) {\n"
-		"	print('READ', utf8Decode(data));\n"
 		"}).catch(function(error) {\n"
 		"	print('ERROR', error);\n"
 		"	exit(1);\n"
@@ -507,19 +506,35 @@ static void _test_file(const tf_test_options_t* options)
 		"}).catch(function(error) {\n"
 		"	print('expected error', error);\n"
 		"});\n"
-		"File.writeFile('out/new.txt', 'hello').then(function(result) {\n"
-		"	File.readFile('out/new.txt').then(function(data) {\n"
-		"		print('READ', utf8Decode(data));\n"
-		"		if (utf8Decode(data) != 'hello') {\n"
+		"File.unlinkFile('out/test/new.txt').finally(function() {\n"
+		"	return File.removeDirectory('out/test');\n"
+		"}).finally(function() {\n"
+		"	return File.makeDirectory('out/test').then(function() {\n"
+		"		return File.writeFile('out/test/new.txt', 'hello').then(function(result) {\n"
+		"			return File.readFile('out/test/new.txt').then(function(data) {\n"
+		"				if (utf8Decode(data) != 'hello') {\n"
+		"					print('READ', utf8Decode(data));\n"
+		"					exit(1);\n"
+		"				}\n"
+		"			}).catch(function(error) {\n"
+		"				print('unexpected read error', error);\n"
+		"				exit(1);\n"
+		"			});\n"
+		"		}).catch(function(error) {\n"
+		"			print('unexpected write error', error);\n"
 		"			exit(1);\n"
-		"		}\n"
+		"		});\n"
 		"	}).catch(function(error) {\n"
-		"		print('unexpected read error', error);\n"
+		"		print('unexpected make directory error', error);\n"
 		"		exit(1);\n"
 		"	});\n"
-		"}).catch(function(error) {\n"
-		"	print('unexpected write error', error);\n"
-		"	exit(1);\n"
+		"}).finally(function() {\n"
+		"	return File.renameFile('out/test/new.txt', 'out/test/renamed.txt').catch(x => print(x)).finally(function() {\n"
+		"		return File.unlinkFile('out/test/renamed.txt').catch(x => print(x)).finally(function() {\n"
+		"			print('removing directory');\n"
+		"			return File.removeDirectory('out/test').catch(x => print(x));\n"
+		"		});\n"
+		"	});\n"
 		"});\n");
 	fclose(file);