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diff --git a/deps/v8/test/debugger/debug/debug-multiple-breakpoints.js b/deps/v8/test/debugger/debug/debug-multiple-breakpoints.js
new file mode 100644
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+++ b/deps/v8/test/debugger/debug/debug-multiple-breakpoints.js
@@ -0,0 +1,92 @@
+// Copyright 2008 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 Google Inc. 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 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.
+
+Debug = debug.Debug
+
+// Simple debug event handler which just counts the number of break points hit.
+var break_point_hit_count;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    break_point_hit_count++;
+  }
+};
+
+// Add the debug event listener.
+Debug.setListener(listener);
+
+// Test functions
+function f() {a=1;b=2;};
+function g() {f();}
+function h() {}
+
+// This test sets several break points at the same place and checks that
+// several break points at the same place only makes one debug break event
+// and that when the last break point is removed no more debug break events
+// occours.
+break_point_hit_count = 0;
+
+// Set a breakpoint in f.
+bp1 = Debug.setBreakPoint(f);
+f();
+assertEquals(1, break_point_hit_count);
+
+// Set another breakpoint in f at the same place.
+assertThrows(() => Debug.setBreakPoint(f));
+f();
+assertEquals(2, break_point_hit_count);
+
+// Remove the break points.
+Debug.clearBreakPoint(bp1);
+f();
+assertEquals(2, break_point_hit_count);
+
+// Perform the same test using function g (this time removing the break points
+// in the another order).
+break_point_hit_count = 0;
+bp1 = Debug.setBreakPoint(g);
+g();
+assertEquals(1, break_point_hit_count);
+assertThrows(() => Debug.setBreakPoint(g));
+g();
+assertEquals(2, break_point_hit_count);
+Debug.clearBreakPoint(bp1);
+g();
+assertEquals(2, break_point_hit_count);
+
+// Finally test with many break points.
+test_count = 10;
+break_point_hit_count = 0;
+for (var i = 0; i < test_count; i++) {
+  if (i == 0) {
+    Debug.setBreakPoint(h);
+  } else {
+    assertThrows(() => Debug.setBreakPoint(h));
+  }
+  h();
+}
+assertEquals(test_count, break_point_hit_count);