diff --git a/test/mjsunit/harmony/regexp-property-blocks.js b/test/mjsunit/harmony/regexp-property-blocks.js
new file mode 100644
index 0000000..d186e98
--- /dev/null
+++ b/test/mjsunit/harmony/regexp-property-blocks.js
@@ -0,0 +1,36 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-regexp-property --harmony-unicode-regexps
+
+function t(re, s) { assertTrue(re.test(s)); }
+function f(re, s) { assertFalse(re.test(s)); }
+
+t(/\p{InASCII}+/u, ".");
+t(/\p{InASCII}+/u, "supercalifragilisticexpialidocious");
+t(/\p{InBasic_Latin}+/u, ".");
+t(/\p{InBasic_Latin}+/u, "supercalifragilisticexpialidocious");
+
+t(/\p{InCJK}+/u, "话说天下大势，分久必合，合久必分");
+t(/\p{InCJK_Unified_Ideographs}+/u, "吾庄后有一桃园，花开正盛");
+f(/\p{InCJK}+/u, "おはようございます");
+f(/\p{InCJK_Unified_Ideographs}+/u,
+  "Something is rotten in the state of Denmark");
+
+t(/\p{InLatin_1}+/u, "Wie froh bin ich, daß ich weg bin!");
+f(/\p{InLatin_1_Supplement}+/u, "奔腾千里荡尘埃，渡水登山紫雾开");
+f(/\p{InLatin_1_Sup}+/u, "いただきます");
+
+t(/\p{InHiragana}/u, "いただきます");
+t(/\p{Hiragana}/u, "\u{1b001}");    // This refers to the script "Hiragana".
+f(/\p{InHiragana}/u, "\u{1b001}");  // This refers to the block "Hiragana".
+
+t(/\p{InGreek_And_Coptic}/u,
+  "ἄνδρα μοι ἔννεπε, μοῦσα, πολύτροπον, ὃς μάλα πολλὰ");
+t(/\p{InGreek}/u, "μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος");
+
+assertThrows("/\\p{In}/u");
+assertThrows("/\\pI/u");
+assertThrows("/\\p{I}/u");
+assertThrows("/\\p{CJK}/u");