diff --git a/src/IF.Lastfm.Core.Tests/TestHelper.cs b/src/IF.Lastfm.Core.Tests/TestHelper.cs
index 1fbcede..3767969 100644
--- a/src/IF.Lastfm.Core.Tests/TestHelper.cs
+++ b/src/IF.Lastfm.Core.Tests/TestHelper.cs
@@ -26,15 +26,22 @@ public static string TestSerialise<T>(this T poco)
             return JsonConvert.SerializeObject(poco, Formatting.Indented, _testSerialiserSettings);
         }
 
+        public static string DifferencesTo<T>(this IEnumerable<T> expected, IEnumerable<T> actual)
+        {
+            var first = String.Join(Environment.NewLine, expected);
+            var second = String.Join(Environment.NewLine, actual);
+
+            return first.DifferencesTo(second);
+        }
+
         public static string DifferencesTo(this string first, string second)
         {
-            const string start = "\n\nDifferences:\n";
+            const string lineDiffTemplate = "{0}A: {1}\n{0}B: {2}";
+            var start = Environment.NewLine + Environment.NewLine + "Differences:" + Environment.NewLine;
 
             var sb = new StringBuilder(start);
-
             var sr1 = new StringReader(first);
             var sr2 = new StringReader(second);
-
             int count = 1;
             using (sr1)
             {
@@ -42,18 +49,26 @@ public static string DifferencesTo(this string first, string second)
                 {
                     while (true)
                     {
-                        string line1, line2;
-                        var lineWasRead = sr1.LineRead(out line1);
-                        lineWasRead &= sr2.LineRead(out line2);
+                        var line1 = sr1.ReadLine();
+                        var line1Read = !String.IsNullOrEmpty(line1);
+                        var line2 = sr2.ReadLine();
+                        var line2Read = !String.IsNullOrEmpty(line2);
 
-                        if (!lineWasRead)
+                        if (line1Read && line2Read)
+                        {
+                            if (line1 != line2)
+                            {
+                                var line = string.Format(lineDiffTemplate, count, line1, line2);
+                                sb.AppendLine(line);
+                            }
+                        }
+                        else if (!line1Read && !line2Read)
                         {
                             break;
                         }
-
-                        if (line1 != line2)
+                        else // one string still has lines
                         {
-                            var line = string.Format("{0}A: {1}\n{0}B: {2}", count, line1, line2);
+                            var line = string.Format(lineDiffTemplate, count, line1, line2);
                             sb.AppendLine(line);
                         }
 
@@ -61,7 +76,6 @@ public static string DifferencesTo(this string first, string second)
                     }
                 }
             }
-
             return sb.ToString();
         }
 
@@ -81,18 +95,23 @@ public static DateTime RoundToNearestSecond(this DateTime dt)
         {
             var ms = dt.Millisecond;
 
-            return ms < 500 
+            return ms < 500
                 ? dt.AddMilliseconds(-ms)
                 : dt.AddMilliseconds(1000 - ms);
         }
 
-        public static void AssertValues<T>(this PageResponse<T> pageResponse, bool success, int totalItems, int pageSize, int page, int totalPages)
-            where T : new()
+        public static void AssertValues<T>(
+            this PageResponse<T> pageResponse,
+            bool success,
+            int totalItems,
+            int pageSize,
+            int page,
+            int totalPages) where T : new()
         {
             const string messageFormat = "Page response:\n{0}\n\nExpected {1} to equal {2}";
             var json = pageResponse.TestSerialise();
             Func<string, dynamic, string> testMessage = (property, count) => string.Format(messageFormat, json, property, count);
-            
+
             Assert.IsTrue(pageResponse.Success == success, testMessage("success", success));
             Assert.IsTrue(pageResponse.TotalItems == totalItems, testMessage("totalitems", totalItems));
             Assert.IsTrue(pageResponse.PageSize == pageSize, testMessage("pagesize", pageSize));