diff --git a/test/unit/blacklister-test.js b/test/unit/blacklister-test.js
new file mode 100644
index 000000000..d9290795c
--- /dev/null
+++ b/test/unit/blacklister-test.js
@@ -0,0 +1,24 @@
+const assert = require('assert')
+const Blacklister = require('../../app/scripts/blacklister')
+
+
+describe('blacklister', function () {
+  describe('#isPhish', function () {
+    it('should not flag whitelisted values', function () {
+      var result = Blacklister('www.metamask.io')
+      assert(!result)
+    })
+    it('should flag explicit values', function () {
+      var result = Blacklister('metamask.com')
+      assert(result)
+    })
+    it('should flag levenshtein values', function () {
+      var result = Blacklister('metmask.io')
+      assert(result)
+    })
+    it('should not flag not-even-close values', function () {
+      var result = Blacklister('example.com')
+      assert(!result)
+    })
+  })
+})