diff --git a/spec/core/asymmetric_equality/EmptySpec.js b/spec/core/asymmetric_equality/EmptySpec.js
index fbfe4823..2946057b 100644
--- a/spec/core/asymmetric_equality/EmptySpec.js
+++ b/spec/core/asymmetric_equality/EmptySpec.js
@@ -24,15 +24,21 @@ describe("Empty", function () {
   it("matches an empty map", function () {
     jasmine.getEnv().requireFunctioningMaps();
     var empty = new jasmineUnderTest.Empty();
+    var fullMap = new Map();
+    fullMap.set('thing', 2);
 
     expect(empty.asymmetricMatch(new Map())).toBe(true);
+    expect(empty.asymmetricMatch(fullMap)).toBe(false);
   });
 
   it("matches an empty map", function () {
     jasmine.getEnv().requireFunctioningSets();
     var empty = new jasmineUnderTest.Empty();
+    var fullSet = new Set();
+    fullSet.add(3);
 
     expect(empty.asymmetricMatch(new Set())).toBe(true);
+    expect(empty.asymmetricMatch(fullSet)).toBe(false);
   });
 
   it("matches an empty typed array", function() {
@@ -40,5 +46,6 @@ describe("Empty", function () {
     var empty = new jasmineUnderTest.Empty();
 
     expect(empty.asymmetricMatch(new Int16Array())).toBe(true);
+    expect(empty.asymmetricMatch(new Int16Array([1,2]))).toBe(false);
   });
 });
diff --git a/spec/core/asymmetric_equality/NotEmptySpec.js b/spec/core/asymmetric_equality/NotEmptySpec.js
index 0ae6443e..85bdce6c 100644
--- a/spec/core/asymmetric_equality/NotEmptySpec.js
+++ b/spec/core/asymmetric_equality/NotEmptySpec.js
@@ -24,19 +24,23 @@ describe("NotEmpty", function () {
   it("matches a non empty map", function () {
     jasmine.getEnv().requireFunctioningMaps();
     var notEmpty = new jasmineUnderTest.NotEmpty();
-    var fullMap = new Map([['one',1]]);
+    var fullMap = new Map();
+    fullMap.set('one', 1);
     var emptyMap = new Map();
 
     expect(notEmpty.asymmetricMatch(fullMap)).toBe(true);
     expect(notEmpty.asymmetricMatch(emptyMap)).toBe(false);
   });
 
-  it("matches a non empty map", function () {
+  it("matches a non empty set", function () {
     jasmine.getEnv().requireFunctioningMaps();
     var notEmpty = new jasmineUnderTest.NotEmpty();
-    var filledSet = new Set([1,2,2,2,2,34]);
+    var filledSet = new Set();
+    filledSet.add(1);
+    var emptySet = new Set();
 
     expect(notEmpty.asymmetricMatch(filledSet)).toBe(true);
+    expect(notEmpty.asymmetricMatch(emptySet)).toBe(false);
   });
 
   it("matches an empty typed array", function() {
@@ -44,5 +48,6 @@ describe("NotEmpty", function () {
     var notEmpty = new jasmineUnderTest.NotEmpty();
 
     expect(notEmpty.asymmetricMatch(new Int16Array([1,2,3]))).toBe(true);
+    expect(notEmpty.asymmetricMatch(new Int16Array())).toBe(false);
   });
 });