diff --git a/src/RJSArray.cpp b/src/RJSArray.cpp
index 2ad920b7..3f7cb3f7 100644
--- a/src/RJSArray.cpp
+++ b/src/RJSArray.cpp
@@ -49,6 +49,14 @@ static inline ObjectArray * RJSVerifiedArray(JSObjectRef object) {
     return array;
 }
 
+static inline ObjectArray * RJSVerifiedMutableArray(JSObjectRef object) {
+    ObjectArray *array = RJSVerifiedArray(object);
+    if (!array->realm->is_in_transaction()) {
+        throw std::runtime_error("Can only mutate lists within a transaction.");
+    }
+    return array;
+}
+
 JSValueRef ArrayGetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* jsException) {
     try {
         // index subscripting
@@ -89,7 +97,7 @@ void ArrayPropertyNames(JSContextRef ctx, JSObjectRef object, JSPropertyNameAccu
 
 JSValueRef ArrayPush(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
     try {
-        ObjectArray *array = RJSVerifiedArray(thisObject);
+        ObjectArray *array = RJSVerifiedMutableArray(thisObject);
         RJSValidateArgumentCountIsAtLeast(argumentCount, 1);
         for (size_t i = 0; i < argumentCount; i++) {
             array->link_view->add(RJSAccessor::to_object_index(ctx, array->realm, const_cast<JSValueRef &>(arguments[i]), array->object_schema.name, false));
@@ -106,7 +114,7 @@ JSValueRef ArrayPush(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObj
 
 JSValueRef ArrayPop(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
     try {
-        ObjectArray *array = RJSVerifiedArray(thisObject);
+        ObjectArray *array = RJSVerifiedMutableArray(thisObject);
         RJSValidateArgumentCount(argumentCount, 0);
 
         size_t size = array->size();
@@ -128,7 +136,7 @@ JSValueRef ArrayPop(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObje
 
 JSValueRef ArrayUnshift(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
     try {
-        ObjectArray *array = RJSVerifiedArray(thisObject);
+        ObjectArray *array = RJSVerifiedMutableArray(thisObject);
         RJSValidateArgumentCountIsAtLeast(argumentCount, 1);
         for (size_t i = 0; i < argumentCount; i++) {
             array->link_view->insert(i, RJSAccessor::to_object_index(ctx, array->realm, const_cast<JSValueRef &>(arguments[i]), array->object_schema.name, false));
@@ -145,7 +153,7 @@ JSValueRef ArrayUnshift(JSContextRef ctx, JSObjectRef function, JSObjectRef this
 
 JSValueRef ArrayShift(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
     try {
-        ObjectArray *array = RJSVerifiedArray(thisObject);
+        ObjectArray *array = RJSVerifiedMutableArray(thisObject);
         RJSValidateArgumentCount(argumentCount, 0);
         if (array->size() == 0) {
             return JSValueMakeUndefined(ctx);
@@ -164,7 +172,7 @@ JSValueRef ArrayShift(JSContextRef ctx, JSObjectRef function, JSObjectRef thisOb
 
 JSValueRef ArraySplice(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
     try {
-        ObjectArray *array = RJSVerifiedArray(thisObject);
+        ObjectArray *array = RJSVerifiedMutableArray(thisObject);
         size_t size = array->size();
 
         RJSValidateArgumentCountIsAtLeast(argumentCount, 2);
diff --git a/tests/ArrayTests.js b/tests/ArrayTests.js
index c07a3d7d..667b594f 100644
--- a/tests/ArrayTests.js
+++ b/tests/ArrayTests.js
@@ -108,6 +108,7 @@ var ArrayTests = {
     testPush: function() {
         var realm = new Realm({schema: [LinkTypesObjectSchema, TestObjectSchema]});
         var array;
+
         realm.write(function() {
             var obj = realm.create('LinkTypesObject', [[1], [2], [[3]]]);
             TestCase.assertEqual(obj.arrayCol.length, 1);
@@ -128,14 +129,15 @@ var ArrayTests = {
         });   
 
         TestCase.assertEqual(array.length, 4);
-        // TestCase.assertThrows(function() {
-        //     array.push([1]);
-        // });
+        TestCase.assertThrows(function() {
+            array.push([1]);
+        }, 'can only push in a write transaction');
     },
 
     testPop: function() {
         var realm = new Realm({schema: [LinkTypesObjectSchema, TestObjectSchema]});
         var array;
+
         realm.write(function() {
             var obj = realm.create('LinkTypesObject', [[1], [2], [[3], [4]]]);
             array = obj.arrayCol;
@@ -151,14 +153,15 @@ var ArrayTests = {
             });
         });
 
-       // TestCase.assertThrows(function() {
-       //      array.pop();
-       //  });
+        TestCase.assertThrows(function() {
+            array.pop();
+        }, 'can only pop in a write transaction');
     },
 
     testUnshift: function() {
         var realm = new Realm({schema: [LinkTypesObjectSchema, TestObjectSchema]});
         var array;
+
         realm.write(function() {
             var obj = realm.create('LinkTypesObject', [[1], [2], [[3]]]);
             TestCase.assertEqual(obj.arrayCol.length, 1);
@@ -175,14 +178,15 @@ var ArrayTests = {
         });   
 
         TestCase.assertEqual(array.length, 4);
-        // TestCase.assertThrows(function() {
-        //     array.unshift([1]);
-        // });
+        TestCase.assertThrows(function() {
+            array.unshift([1]);
+        }, 'can only unshift in a write transaction');
     },
 
     testShift: function() {
         var realm = new Realm({schema: [LinkTypesObjectSchema, TestObjectSchema]});
         var array;
+
         realm.write(function() {
             var obj = realm.create('LinkTypesObject', [[1], [2], [[3], [4]]]);
             array = obj.arrayCol;
@@ -198,19 +202,21 @@ var ArrayTests = {
             });
         });
 
-       // TestCase.assertThrows(function() {
-       //      array.shift();
-       //  });
+        TestCase.assertThrows(function() {
+            array.shift();
+        }, 'can only shift in a write transaction');
     },
 
     testSplice: function() {
         var realm = new Realm({schema: [LinkTypesObjectSchema, TestObjectSchema]});
+        var array;
 
         realm.write(function() {
             var obj = realm.create('LinkTypesObject', [[1], [2], [[3], [4]]]);
-            var array = obj.arrayCol;
             var removed;
 
+            array = obj.arrayCol;
+
             removed = array.splice(0, 0, obj.objectCol, obj.objectCol1);
             TestCase.assertEqual(removed.length, 0);
             TestCase.assertEqual(array.length, 4);
@@ -248,5 +254,9 @@ var ArrayTests = {
                 array.splice(0, 0, 0);
             });
         });
+
+        TestCase.assertThrows(function() {
+            obj.arrayCol.splice(0, 0, obj.objectCol);
+        }, 'can only splice in a write transaction');
     },
 };