3 files changed, 32 insertions, 5 deletions
diff --git a/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js b/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
index 1f7c7042f0..998d25e2c0 100644
--- a/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
+++ b/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
@@ -40,9 +40,7 @@ function checkDataProperty(obj, p, expect, msg)
 
 // Check a bunch of "empty" regular expressions first.
 
-var choices = [{ msg: "RegExp.prototype",
-                 get: function() { return RegExp.prototype; } },
-               { msg: "new RegExp()",
+var choices = [{ msg: "new RegExp()",
                  get: function() { return new RegExp(); } },
                { msg: "/(?:)/",
                  get: Function("return /(?:)/;") }];
@@ -55,7 +53,6 @@ function checkRegExp(r, msg, lastIndex)
   checkDataProperty(r, "lastIndex", expect, msg);
 }
 
-checkRegExp(RegExp.prototype, "RegExp.prototype", 0);
 checkRegExp(new RegExp(), "new RegExp()", 0);
 checkRegExp(/(?:)/, "/(?:)/", 0);
 checkRegExp(Function("return /(?:)/;")(), 'Function("return /(?:)/;")()', 0);
diff --git a/js/src/tests/ecma_6/RegExp/prototype.js b/js/src/tests/ecma_6/RegExp/prototype.js
new file mode 100644
index 0000000000..528142ab0c
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/prototype.js
@@ -0,0 +1,31 @@
+const t = RegExp.prototype;
+
+const properties = "toSource,toString,compile,exec,test," +
+                   "flags,global,ignoreCase,multiline,source,sticky,unicode," +
+                   "constructor," +
+                   "Symbol(Symbol.match),Symbol(Symbol.replace),Symbol(Symbol.search),Symbol(Symbol.split)";
+assertEq(Reflect.ownKeys(t).map(String).toString(), properties);
+
+
+// Invoking getters on the prototype should not throw
+function getter(name) {
+    return Object.getOwnPropertyDescriptor(t, name).get.call(t);
+}
+
+assertEq(getter("flags"), "");
+assertEq(getter("global"), undefined);
+assertEq(getter("ignoreCase"), undefined);
+assertEq(getter("multiline"), undefined);
+assertEq(getter("source"), "(?:)");
+assertEq(getter("sticky"), undefined);
+assertEq(getter("unicode"), undefined);
+
+assertEq(t.toString(), "/(?:)/");
+
+// The methods don't work with the prototype
+assertThrowsInstanceOf(() => t.compile("b", "i"), TypeError);
+assertThrowsInstanceOf(() => t.test("x"), TypeError);
+assertThrowsInstanceOf(() => t.exec("x"), TypeError);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/js1_8_5/extensions/clone-regexp.js b/js/src/tests/js1_8_5/extensions/clone-regexp.js
index 97f7557853..8541dae98c 100644
--- a/js/src/tests/js1_8_5/extensions/clone-regexp.js
+++ b/js/src/tests/js1_8_5/extensions/clone-regexp.js
@@ -22,7 +22,6 @@ function testRegExp(b, c=b) {
 testRegExp(RegExp(""));
 testRegExp(/(?:)/);
 testRegExp(/^(.*)$/gimy);
-testRegExp(RegExp.prototype);
 
 var re = /\bx\b/gi;
 re.expando = true;