diff --git a/WORKSPACE b/WORKSPACE
index c14b710ee8..c9bf457a94 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -47,13 +47,6 @@ http_archive(
     patch_cmds = ["find google -type f -name BUILD.bazel -delete"],
 )
 
-http_archive(
-    name = "rules_fuzzing",
-    sha256 = "d9002dd3cd6437017f08593124fdd1b13b3473c7b929ceb0e60d317cb9346118",
-    strip_prefix = "rules_fuzzing-0.3.2",
-    urls = ["https://github.com/bazelbuild/rules_fuzzing/archive/v0.3.2.zip"],
-)
-
 http_archive(
     name = "com_google_absl",
     sha256 = "e7fdfe0bed87702a22c5b73b6b5fe08bedd25f17d617e52df6061b0f47d480b0",
@@ -63,14 +56,6 @@ http_archive(
     ],
 )
 
-load("@rules_fuzzing//fuzzing:repositories.bzl", "rules_fuzzing_dependencies")
-
-rules_fuzzing_dependencies()
-
-load("@rules_fuzzing//fuzzing:init.bzl", "rules_fuzzing_init")
-
-rules_fuzzing_init()
-
 load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
 
 rules_pkg_dependencies()
@@ -96,6 +81,3 @@ pip_parse(
 
 load("@pip_deps//:requirements.bzl", "install_deps")
 install_deps()
-
-load("@system_python//:fuzzing_py.bzl", "fuzzing_py_install_deps")
-fuzzing_py_install_deps()
diff --git a/upb/fuzz/BUILD b/upb/fuzz/BUILD
deleted file mode 100644
index fa0767e3df..0000000000
--- a/upb/fuzz/BUILD
+++ /dev/null
@@ -1,13 +0,0 @@
-load("@rules_fuzzing//fuzzing:cc_defs.bzl", "cc_fuzz_test")
-
-licenses(["notice"])
-
-cc_fuzz_test(
-    name = "file_descriptor_parsenew_fuzzer",
-    srcs = ["file_descriptor_parsenew_fuzzer.cc"],
-    deps = [
-        "//:descriptor_upb_proto",
-        "//:reflection",
-        "//:upb",
-    ],
-)
diff --git a/upb/fuzz/file_descriptor_parsenew_fuzzer.cc b/upb/fuzz/file_descriptor_parsenew_fuzzer.cc
deleted file mode 100644
index 3d9c4c6f05..0000000000
--- a/upb/fuzz/file_descriptor_parsenew_fuzzer.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (c) 2009-2021, Google LLC
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above copyright
-//       notice, this list of conditions and the following disclaimer in the
-//       documentation and/or other materials provided with the distribution.
-//     * Neither the name of Google LLC nor the
-//       names of its contributors may be used to endorse or promote products
-//       derived from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-// ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT,
-// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <cstdint>
-
-#include "google/protobuf/descriptor.upb.h"
-#include "upb/def.hpp"
-#include "upb/upb.hpp"
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  upb::Arena arena;
-  google_protobuf_FileDescriptorProto* proto =
-      google_protobuf_FileDescriptorProto_parse(
-          reinterpret_cast<const char*>(data), size, arena.ptr());
-  if (proto) {
-    upb::SymbolTable symtab;
-    upb::Status status;
-    symtab.AddFile(proto, &status);
-  }
-  return 0;
-}