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diff --git a/test/util/epoll_util.h b/test/util/epoll_util.h
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+++ b/test/util/epoll_util.h
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+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GVISOR_TEST_UTIL_EPOLL_UTIL_H_
+#define GVISOR_TEST_UTIL_EPOLL_UTIL_H_
+
+#include "test/util/file_descriptor.h"
+#include "test/util/posix_error.h"
+
+namespace gvisor {
+namespace testing {
+
+// Returns a new epoll file descriptor.
+PosixErrorOr<FileDescriptor> NewEpollFD(int size = 1);
+
+// Registers `target_fd` with the epoll instance represented by `epoll_fd` for
+// the epoll events `events`. Events on `target_fd` will be indicated by setting
+// data.u64 to `data` in the returned epoll_event.
+PosixError RegisterEpollFD(int epoll_fd, int target_fd, int events,
+                           uint64_t data);
+
+}  // namespace testing
+}  // namespace gvisor
+
+#endif  // GVISOR_TEST_UTIL_EPOLL_UTIL_H_