From 2364b9171f3842b525b5c6375ae77ab6b23e9c14 Mon Sep 17 00:00:00 2001
From: Jan Kotas <jkotas@microsoft.com>
Date: Thu, 20 Jun 2019 07:19:38 -0700
Subject: [PATCH] Improve test coverage for Convert.FromBase64

---
 .../tests/System/Convert.FromBase64.cs                         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/System.Runtime.Extensions/tests/System/Convert.FromBase64.cs b/src/System.Runtime.Extensions/tests/System/Convert.FromBase64.cs
index 82b56c6ab5ff..fa239815660b 100644
--- a/src/System.Runtime.Extensions/tests/System/Convert.FromBase64.cs
+++ b/src/System.Runtime.Extensions/tests/System/Convert.FromBase64.cs
@@ -186,7 +186,8 @@ public static void InvalidLength()
         [Fact]
         public static void InvalidInput()
         {
-            Assert.Throws<ArgumentNullException>(() => Convert.FromBase64CharArray(null, 0, 3));
+            Assert.Throws<ArgumentNullException>("inArray", () => Convert.FromBase64CharArray(null, 0, 3));
+            Assert.Throws<ArgumentNullException>("s", () => Convert.FromBase64String(null));
 
             // Input must be at least 4 characters long
             VerifyInvalidInput("No");