diff --git a/test/unit/util_test.js b/test/unit/util_test.js
index 6ad27ed81..12a16999e 100644
--- a/test/unit/util_test.js
+++ b/test/unit/util_test.js
@@ -78,11 +78,11 @@ describe('util', function() {
     })
 
     it('should recognize this sample hashed address', function() {
-      const address = '0x5Fda30Bb72B8Dfe20e48A00dFc108d0915BE9BbA'
+      const address = '0x5Fda30Bb72B8Dfe20e48A00dFc108d0915BE9Bb0'
       const result = util.isValidAddress(address)
-      const hashed = ethUtil.toChecksumAddress(address)
+      const hashed = ethUtil.toChecksumAddress(address.toLowerCase())
       assert.equal(hashed, address, 'example is hashed correctly')
-      assert.ok(result)
+      assert.ok(result, 'is valid by our check')
     })
   })
 
diff --git a/ui/app/util.js b/ui/app/util.js
index 91f85e43f..6ece28a9e 100644
--- a/ui/app/util.js
+++ b/ui/app/util.js
@@ -52,7 +52,7 @@ function addressSummary(address) {
 
 function isValidAddress(address) {
   var prefixed = ethUtil.addHexPrefix(address)
-  return isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed) || ethUtil.isValidChecksumAddress(prefixed)
+  return (isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed)) || ethUtil.isValidChecksumAddress(prefixed)
 }
 
 function isAllOneCase(address) {