diff --git a/tests/assert.js b/tests/assert.js
index c8240c8..42369ed 100644
--- a/tests/assert.js
+++ b/tests/assert.js
@@ -3,14 +3,8 @@ export function assert(actual, expected, message) {
         expected = true;
 
     if (typeof actual === typeof expected) {
-        if (actual === expected) {
-            if (actual !== 0 || (1 / actual) === (1 / expected))
-                return;
-        }
-        if (typeof actual === 'number') {
-            if (isNaN(actual) && isNaN(expected))
-                return;
-        }
+        if (Object.is(actual, expected))
+            return;
         if (typeof actual === 'object') {
             if (actual !== null && expected !== null
             &&  actual.constructor === expected.constructor
diff --git a/tests/test_language.js b/tests/test_language.js
index cda782b..4fa16c8 100644
--- a/tests/test_language.js
+++ b/tests/test_language.js
@@ -2,7 +2,7 @@ function assert(actual, expected, message) {
     if (arguments.length == 1)
         expected = true;
 
-    if (actual === expected)
+    if (Object.is(actual, expected))
         return;
 
     if (actual !== null && expected !== null
diff --git a/tests/test_std.js b/tests/test_std.js
index df02f92..0bbd9e7 100644
--- a/tests/test_std.js
+++ b/tests/test_std.js
@@ -6,7 +6,7 @@ function assert(actual, expected, message) {
     if (arguments.length == 1)
         expected = true;
 
-    if (actual === expected)
+    if (Object.is(actual, expected))
         return;
 
     if (actual !== null && expected !== null