diff --git a/spec/parser.spec.js b/spec/parser.spec.js
index fc9eb21..d2f7db8 100644
--- a/spec/parser.spec.js
+++ b/spec/parser.spec.js
@@ -72,6 +72,11 @@ describe("PEG.js grammar parser", function() {
     });
   });
 
+  /* Canonical hexEscapeSequence is "\\xFF". */
+  it("parses hexEscapeSequence", function() {
+    expect('start = "\\xFF"').toParseAs(literalGrammar("\xFF"));
+  });
+
   /* Canonical unicodeEscapeSequence is "\\uFFFF". */
   it("parses unicodeEscapeSequence", function() {
     expect('start = "\\uFFFF"').toParseAs(literalGrammar("\uFFFF"));
diff --git a/test/parser-test.js b/test/parser-test.js
index 76242d8..b08e214 100644
--- a/test/parser-test.js
+++ b/test/parser-test.js
@@ -492,16 +492,4 @@ test("parses zeroEscapeSequence", function() {
   parserDoesNotParse('start = "\\09"');
 });
 
-/* Canonical hexEscapeSequence is "\\x00". */
-test("parses hexEscapeSequence", function() {
-  parserParses('start = "\\x00"',  literalGrammar("\x00"));
-  parserParses('start = "\\x09"',  literalGrammar("\x09"));
-  parserParses('start = "\\x0a"',  literalGrammar("\x0a"));
-  parserParses('start = "\\x0f"',  literalGrammar("\x0f"));
-  parserParses('start = "\\x0A"',  literalGrammar("\x0A"));
-  parserParses('start = "\\x0F"',  literalGrammar("\x0F"));
-  parserDoesNotParse('start = "\\x0"');
-  parserParses('start = "\\x000"', literalGrammar("\x000"));
-});
-
 })();