diff --git a/packages/minifier-js/tests/minifier-tests.js b/packages/minifier-js/tests/minifier-tests.js
index 20f6f51703..0805734b33 100644
--- a/packages/minifier-js/tests/minifier-tests.js
+++ b/packages/minifier-js/tests/minifier-tests.js
@@ -1,4 +1,4 @@
-
+// this test case is just for general minification tests that are not specific to any single setting
 Tinytest.add('minifier-js - verify simple JS minifications work', (test) => {
   let result = meteorJsMinify('function add(first,second){return first + second; }\n');
   test.equal(result.code, 'function add(n,d){return n+d}');
@@ -6,20 +6,33 @@ Tinytest.add('minifier-js - verify simple JS minifications work', (test) => {
   result = meteorJsMinify('let foo;if (typeof foo == "undefined") { console.log("undefined variable"); }\n');
   test.equal(result.code, 'let foo;void 0===foo&&console.log("undefined variable");');
 
+  result = meteorJsMinify('let z = [1, undefined, 3];\n');
+  test.equal(result.code, 'let z=[1,void 0,3];');
+
   result = meteorJsMinify('function a(z) { let returnValue = z == 10; return returnValue; }\n');
   test.equal(result.code,'function a(n){let t;return 10==n}');
 });
 
+
 // properties -- default(true)
 Tinytest.add('minifier-js - verify properties setting', (test) => {
   let result = meteorJsMinify('const person = {};person["name"] = "brian";person["age"] = 100; function printName(person){console.log(person["name"])};printName(person);\n');
   test.equal(result.code, 'const person={};function printName(n){console.log(n.name)}person.name="brian",person.age=100,printName(person);');
 });
 
+
 // evaluate -- default(true)
 Tinytest.add('minifier-js - verify evaluate setting', (test) => {
   let result = meteorJsMinify('let a = 10 + 20 + 30;\n');
   test.equal(result.code, 'let a=60;');
+
+});
+
+// this test is an evaluation, but since unsafe is false it won't get evaluated
+Tinytest.add('minifier-js - verify that an unsafe evaluation will fail', (test) => {
+
+  let result = meteorJsMinify('var a = [ "foo", "bar", "baz" ].join("");\n');
+  test.equal(result.code, 'var a=["foo","bar","baz"].join("");');
 });
 
 // keep_infinity -- default(false)
@@ -28,6 +41,7 @@ Tinytest.add('minifier-js - verify keep_infinity setting', (test) => {
   test.equal(result.code, 'let a=1/0;');
 });
 
+
 // sequences -- default(true)
 Tinytest.add('minifier-js - verify sequences setting', (test) => {
   let result = meteorJsMinify('var name = "meteor"; var website = "www.meteor.com";var memberCount = 56;\n');
@@ -40,9 +54,9 @@ Tinytest.add('minifier-js - verify sequences setting', (test) => {
   test.equal(result.code, 'const name="meteor",website="www.meteor.com",memberCount=56;');
 });
 
+
 // dead_code -- default(true)
-Tinytest.add('minifier-js - verify dead_code setting', (test) => {
-   
+Tinytest.add('minifier-js - verify dead_code setting', (test) => {   
   let result = meteorJsMinify('function f() {a();b();x = 10;return;if (x) {y();}}\n');
   test.equal(result.code, 'function f(){a(),b(),x=10}');
 
@@ -50,6 +64,14 @@ Tinytest.add('minifier-js - verify dead_code setting', (test) => {
   test.equal(result.code,'0;');
 });
 
+
+// unsafe_proto -- default(false)
+Tinytest.add('minifier-js - verify unsafe_proto setting', (test) => {
+  let result = meteorJsMinify('Array.prototype.slice.call(a);\n');
+  test.equal(result.code, 'Array.prototype.slice.call(a);');
+});
+
+
 //keep_numbers -- default(false)
 Tinytest.add('minifier-js - verify keep_numbers setting', (test) => {   
   let result = meteorJsMinify('let number = 1_000_000_000_000;\n');
@@ -60,13 +82,13 @@ Tinytest.add('minifier-js - verify keep_numbers setting', (test) => {
 });
 
 
-// unused -- default(true)
+// unused -- default(true) we set it to false
 Tinytest.add('minifier-js - verify unused setting', (test) => {
   let result = meteorJsMinify('function foo(){let name = "ron";let firstName = "roger";console.log(firstName)};function bar(){let name = "ron";let firstName = "roger";console.log(firstName)};foo()\n');
   test.equal(result.code, 'function foo(){let o="ron",r="roger";console.log("roger")}function bar(){let o="ron",r="roger";console.log("roger")}foo();');
 });
 
-// drop_debugger -- default(true)
+// drop_debugger -- default(true) we set it to false
 Tinytest.add('minifier-js - verify drop_debugger setting', (test) => {
   let result = meteorJsMinify('let name = "meteor"; debugger; let age = 100;\n');
   test.equal(result.code, 'let name="meteor";debugger;let age=100;');