diff --git a/ansi-styles/ansi-styles-tests.ts b/ansi-styles/ansi-styles-tests.ts
new file mode 100644
index 00000000000000..dc3187ef5b6857
--- /dev/null
+++ b/ansi-styles/ansi-styles-tests.ts
@@ -0,0 +1,54 @@
+/// <reference path="ansi-styles.d.ts" />
+
+import ansi = require('ansi-styles');
+
+
+var styles = [
+    ansi.reset, 
+
+    ansi.bold, 
+    ansi.dim, 
+    ansi.italic, 
+    ansi.underline, 
+    ansi.inverse, 
+    ansi.hidden, 
+    ansi.strikethrough, 
+
+    ansi.black, 
+    ansi.red, 
+    ansi.green, 
+    ansi.yellow, 
+    ansi.blue, 
+    ansi.magenta, 
+    ansi.cyan, 
+    ansi.white, 
+    ansi.gray, 
+
+    ansi.bgBlack, 
+    ansi.bgRed, 
+    ansi.bgGreen, 
+    ansi.bgYellow, 
+    ansi.bgBlue, 
+    ansi.bgMagenta, 
+    ansi.bgCyan, 
+    ansi.bgWhite
+]
+
+for (var key in styles) {
+    check(key, styles[key])
+}
+
+function check(key:string, escapeCodes:ansi.EscapeCodePair): void {
+    if (uninitialized(escapeCodes.open)) {
+        throw new Error('key not found ~> ' + key + '.open')
+    }
+    if (uninitialized(escapeCodes.close)) {
+        throw new Error('key not found ~> ' + key + '.close')
+    }
+}
+
+function uninitialized(val:any): boolean {
+    return val === null || val === undefined
+}
+
+