diff --git a/test/assert.js b/test/assert.js
index 1d3f7c85..ee6f1b19 100644
--- a/test/assert.js
+++ b/test/assert.js
@@ -1981,11 +1981,11 @@ describe('assert', function () {
 
     err(function () {
       assert.sameMembers({}, [], 'blah');
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
 
     err(function () {
       assert.sameMembers([], {}, 'blah');
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
   });
 
   it('notSameMembers', function() {
diff --git a/test/expect.js b/test/expect.js
index d5247655..6b968930 100644
--- a/test/expect.js
+++ b/test/expect.js
@@ -3508,19 +3508,19 @@ describe('expect', function () {
 
     err(function () {
       expect({}).members([], 'blah');
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
 
     err(function () {
       expect({}, 'blah').members([]);
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
 
     err(function () {
       expect([]).members({}, 'blah');
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
 
     err(function () {
       expect([], 'blah').members({});
-    }, 'blah: expected {} to be an array');
+    }, 'blah: expected {} to be an iterator');
   });
 
   it('deep.members', function() {
diff --git a/test/should.js b/test/should.js
index adb94d94..272fc57c 100644
--- a/test/should.js
+++ b/test/should.js
@@ -2820,11 +2820,11 @@ describe('should', function() {
 
     err(function() {
       'foo'.should.include.members([12], 'blah');
-    }, "blah: expected 'foo' to be an array");
+    }, "blah: expected 'foo' to be an iterator");
 
     err(function() {
       [1, 2, 3].should.include.members('o', 'blah');
-    }, "blah: expected 'o' to be an array");
+    }, "blah: expected 'o' to be an iterator");
   });
 
   it('memberEquals', function() {
@@ -2845,7 +2845,7 @@ describe('should', function() {
 
     err(function() {
       [1, 2, 3].should.have.same.members(4, 'blah');
-    }, 'blah: expected 4 to be an array');
+    }, 'blah: expected 4 to be an iterator');
   });
 
   it('deep.members', function() {