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diff --git a/deps/v8/test/cctest/test-fuzz-arm64.cc b/deps/v8/test/cctest/test-fuzz-arm64.cc
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+++ b/deps/v8/test/cctest/test-fuzz-arm64.cc
@@ -0,0 +1,71 @@
+// Copyright 2013 the V8 project authors. 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 ARM Limited 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 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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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 <stdlib.h>
+#include "cctest.h"
+
+#include "arm64/decoder-arm64.h"
+#include "arm64/decoder-arm64-inl.h"
+#include "arm64/disasm-arm64.h"
+
+using namespace v8::internal;
+
+TEST(FUZZ_decoder) {
+  // Feed noise into the decoder to check that it doesn't crash.
+  // 43 million = ~1% of the instruction space.
+  static const int instruction_count = 43 * 1024 * 1024;
+
+  uint16_t seed[3] = {1, 2, 3};
+  seed48(seed);
+
+  Decoder<DispatchingDecoderVisitor> decoder;
+  Instruction buffer[kInstructionSize];
+
+  for (int i = 0; i < instruction_count; i++) {
+    uint32_t instr = mrand48();
+    buffer->SetInstructionBits(instr);
+    decoder.Decode(buffer);
+  }
+}
+
+
+TEST(FUZZ_disasm) {
+  // Feed noise into the disassembler to check that it doesn't crash.
+  // 9 million = ~0.2% of the instruction space.
+  static const int instruction_count = 9 * 1024 * 1024;
+
+  uint16_t seed[3] = {42, 43, 44};
+  seed48(seed);
+
+  Decoder<DispatchingDecoderVisitor> decoder;
+  Disassembler disasm;
+  Instruction buffer[kInstructionSize];
+
+  decoder.AppendVisitor(&disasm);
+  for (int i = 0; i < instruction_count; i++) {
+    uint32_t instr = mrand48();
+    buffer->SetInstructionBits(instr);
+    decoder.Decode(buffer);
+  }
+}