diff --git a/ecmascript-testcases/test-bi-array-constructor.js b/ecmascript-testcases/test-bi-array-constructor.js
index 211c6272..1395b1af 100644
--- a/ecmascript-testcases/test-bi-array-constructor.js
+++ b/ecmascript-testcases/test-bi-array-constructor.js
@@ -1,4 +1,3 @@
-// FIXME: something like this to utils; perhaps Test.run()
 function run(f) {
     try {
         f();
@@ -31,7 +30,6 @@ object 20 [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
 
 function asFunctionTest() {
     function p(x) {
-        // FIXME: JSON
         print(typeof x, x.length, JSON.stringify(x));
     }
 
@@ -93,7 +91,6 @@ object 20 [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
 
 function asConstructorTest() {
     function p(x) {
-        // FIXME: JSON
         print(typeof x, x.length, JSON.stringify(x));
     }
 
diff --git a/ecmascript-testcases/test-bi-array-proto-pop.js b/ecmascript-testcases/test-bi-array-proto-pop.js
index e6465380..3c891a26 100644
--- a/ecmascript-testcases/test-bi-array-proto-pop.js
+++ b/ecmascript-testcases/test-bi-array-proto-pop.js
@@ -1,4 +1,4 @@
-// FIXME: these should be shared utils for Array testing
+// XXX: these should be shared utils for Array testing
 
 function dumpValue(v) {
     var i, n, n_clipped;
diff --git a/ecmascript-testcases/test-bi-array-proto-push.js b/ecmascript-testcases/test-bi-array-proto-push.js
index 7dab3ea8..e15c3ac8 100644
--- a/ecmascript-testcases/test-bi-array-proto-push.js
+++ b/ecmascript-testcases/test-bi-array-proto-push.js
@@ -1,8 +1,8 @@
-// FIXME: these should be shared utils for Array testing
+// XXX: these should be shared utils for Array testing
 
 function printDesc(obj, key) {
     var pd = Object.getOwnPropertyDescriptor(obj, key);
-    print(JSON.stringify(pd));  // FIXME
+    print(JSON.stringify(pd));
 }
 
 function dumpValue(v) {
diff --git a/ecmascript-testcases/test-bi-array-proto-reverse.js b/ecmascript-testcases/test-bi-array-proto-reverse.js
index 5c889def..cb94a0b0 100644
--- a/ecmascript-testcases/test-bi-array-proto-reverse.js
+++ b/ecmascript-testcases/test-bi-array-proto-reverse.js
@@ -1,4 +1,4 @@
-// FIXME: shared test utils
+// XXX: shared test utils
 
 function formatValue(v) {
     if (typeof v === 'function') {
diff --git a/ecmascript-testcases/test-bi-array-proto-shift.js b/ecmascript-testcases/test-bi-array-proto-shift.js
index 8613d47e..7dc0e8ff 100644
--- a/ecmascript-testcases/test-bi-array-proto-shift.js
+++ b/ecmascript-testcases/test-bi-array-proto-shift.js
@@ -1,4 +1,4 @@
-// FIXME: util
+// XXX: util
 
 function dumpValue(v) {
     var i, n;
@@ -909,6 +909,6 @@ try {
     print(e);
 }
 
-/* FIXME: enumeration order effects, when sparse: deleting and adding properties
+/* XXX: enumeration order effects, when sparse: deleting and adding properties
  * changes their ordering on each shift().
  */
diff --git a/ecmascript-testcases/test-bi-array-proto-slice.js b/ecmascript-testcases/test-bi-array-proto-slice.js
index f5adbdc0..c3b8f5c4 100644
--- a/ecmascript-testcases/test-bi-array-proto-slice.js
+++ b/ecmascript-testcases/test-bi-array-proto-slice.js
@@ -1,4 +1,4 @@
-// FIXME: util
+// XXX: util
 function printDesc(obj, key) {
     var pd = Object.getOwnPropertyDescriptor(obj, key);
     if (!pd) {
@@ -14,7 +14,7 @@ function printDesc(obj, key) {
           'set=' + typeof pd.set);
 }
 
-// FIXME: util
+// XXX: util
 function dumpValue(v) {
     var i, n;
     var tmp = [];