diff --git a/spec/parser.spec.js b/spec/parser.spec.js
index 5266bc9..5842ef4 100644
--- a/spec/parser.spec.js
+++ b/spec/parser.spec.js
@@ -17,6 +17,10 @@ describe("PEG.js grammar parser", function() {
     };
   }
 
+  function ruleRefGrammar(name) {
+    return oneRuleGrammar(null, { type: "rule_ref", name: name });
+  }
+
   function literalGrammar(value) {
     var ignoreCase = arguments.length > 1 ? arguments[1] : false;
 
@@ -121,6 +125,20 @@ describe("PEG.js grammar parser", function() {
     });
   });
 
+  /* Canonical identifier is "a". */
+  it("parses identifier", function() {
+    expect('start = a'   ).toParseAs(ruleRefGrammar("a"));
+    expect('start = _'   ).toParseAs(ruleRefGrammar("_"));
+    expect('start = $'   ).toParseAs(ruleRefGrammar("$"));
+    expect('start = aa'  ).toParseAs(ruleRefGrammar("aa"));
+    expect('start = a0'  ).toParseAs(ruleRefGrammar("a0"));
+    expect('start = a_'  ).toParseAs(ruleRefGrammar("a_"));
+    expect('start = a$'  ).toParseAs(ruleRefGrammar("a$"));
+    expect('start = abcd').toParseAs(ruleRefGrammar("abcd"));
+
+    expect('start = a\n').toParseAs(ruleRefGrammar("a"));
+  });
+
   /* Canonical literal is "\"abcd\"". */
   it("parses literal", function() {
     expect('start = "abcd"' ).toParseAs(literalGrammar("abcd"));
diff --git a/test/parser-test.js b/test/parser-test.js
index bf86baf..451ba38 100644
--- a/test/parser-test.js
+++ b/test/parser-test.js
@@ -317,25 +317,4 @@ test("parses braced", function() {
 
 /* Trivial character rules are not tested. */
 
-/* Canonical identifier is "a". */
-test("parses identifier", function() {
-  parserParses('start = a',    identifierGrammar("a"));
-  parserParses('start = z',    identifierGrammar("z"));
-  parserParses('start = A',    identifierGrammar("A"));
-  parserParses('start = Z',    identifierGrammar("Z"));
-  parserParses('start = _',    identifierGrammar("_"));
-  parserParses('start = $',    identifierGrammar("$"));
-  parserParses('start = aa',   identifierGrammar("aa"));
-  parserParses('start = az',   identifierGrammar("az"));
-  parserParses('start = aA',   identifierGrammar("aA"));
-  parserParses('start = aZ',   identifierGrammar("aZ"));
-  parserParses('start = a0',   identifierGrammar("a0"));
-  parserParses('start = a9',   identifierGrammar("a9"));
-  parserParses('start = a_',   identifierGrammar("a_"));
-  parserParses('start = a$',   identifierGrammar("a$"));
-  parserParses('start = abcd', identifierGrammar("abcd"));
-
-  parserParses('start = a\n',  identifierGrammar("a"));
-});
-
 })();