diff --git a/src/test.it.js b/src/test.it.js
index 797a126..f3d29e9 100644
--- a/src/test.it.js
+++ b/src/test.it.js
@@ -1,46 +1,65 @@
-'use strict';
+/* Test.it v 0.5 | MIT | https://github.com/n2geoff/testit */
+(function(root, factory) {
+    // support  browser & commonjs
+    if(typeof module === "object" && module.exports) {
+        module.exports = factory(root.test);
+    } else {
+        root.test = factory(root.test);
+    }
+}(this, function() {
+    'use strict';
 
-const test = {
-    it: function(tests, next) {
-        // capture results
-        let failed = [];
-        let passed = [];
-
-        // loop through tests
-        Object.keys(tests).forEach(function(name) {
-            let test = tests[name];
-
-            // execute
-            try {
-                test();
-                passed.push(`\n+ ${name}`);
-            } catch (err) {
-                // TODO: include error stack option
-                // let back = err.stack.split('\n')[2];
-                // let re = /(?<=\()(.*?)(?=\))/g;
-                // let trace = re.exec(back)[0];
-                failed.push(`\n- ${name}`);
-                console.error(err);
-                // failed.push(`\n- ${name} - - ${trace}`);
-            }
-        });
-
-        // summary
-        if(typeof next === 'function') {
-            return next({
-                pass: passed,
-                fail: failed
+    const test = {
+        _tests: {},
+        run: function(next) {
+    
+            let tests = this._tests;
+            // capture results
+            let failed = [];
+            let passed = [];
+    
+            // loop through tests
+            Object.keys(tests).forEach(function(name) {
+                let test = tests[name];
+    
+                // execute
+                try {
+                    test();
+                    passed.push(`\n+ ${name}`);
+                } catch (err) {
+                    // TODO: include error stack option
+                    // let back = err.stack.split('\n')[2];
+                    // let re = /(?<=\()(.*?)(?=\))/g;
+                    // let trace = re.exec(back)[0];
+                    failed.push(`\n- ${name}`);
+                    console.error(err);
+                    // failed.push(`\n- ${name} - - ${trace}`);
+                }
             });
-        } else {
-            console.log(...passed, ...failed);
-            console.log(`\n# tests ${failed.length + passed.length} pass ${passed.length} fail ${failed.length}`);
+    
+            // summary
+            if(typeof next === 'function') {
+                return next({
+                    pass: passed,
+                    fail: failed
+                });
+            } else {
+                console.log(...passed, ...failed);
+                console.log(`\n# tests ${failed.length + passed.length} pass ${passed.length} fail ${failed.length}`);
+    
+                return failed.length ? false : true;
+            }
+        },
+        it: function(tests) {
+            this._tests = tests;
+            return this;
+        },
+        assert: function (e, a) { if (e != a) throw Error(`expected ${e} == ${a}`); },
+        equals: function (e, a) { if (e !== a) throw Error(`expected ${e} === ${a}`); },
+        exists: function (v) { if (!v) throw Error(`exists value ${v}`); },
+        pass: function () { return true; },
+        fail: function (m) { throw Error(m); }
+    }
 
-            return failed.length ? false : true;
-        }
-    },
-    assert: function (e, a) { if (e != a) throw Error(`expected ${e} == ${a}`); },
-    equals: function (e, a) { if (e !== a) throw Error(`expected ${e} === ${a}`); },
-    exists: function (v) { if (!v) throw Error(`exists value ${v}`); },
-    pass: function () { return true; },
-    fail: function (m) { throw Error(m); }
-}
+    return test;
+}));