diff --git a/exercises/practice/simple-linked-list/SimpleLinkedListTests.cs b/exercises/practice/simple-linked-list/SimpleLinkedListTests.cs
index 35a89822d2..c6c7e966eb 100644
--- a/exercises/practice/simple-linked-list/SimpleLinkedListTests.cs
+++ b/exercises/practice/simple-linked-list/SimpleLinkedListTests.cs
@@ -1,4 +1,5 @@
 using System.Linq;
+using System.Collections.Generic;
 using Xunit;
 
 public class SimpleLinkedListTests
@@ -41,8 +42,16 @@ public void Two_item_list_second_item_has_no_next()
     [Fact(Skip = "Remove this Skip property to run this test")]
     public void Implements_enumerable()
     {
-        var values = new SimpleLinkedList<int>(2).Add(1);
-        Assert.Equal(new[] { 2, 1 }, values);
+        var list = new SimpleLinkedList<int>(2).Add(1).Add(3);
+        var enumerable = Assert.IsAssignableFrom<IEnumerable<int>>(list);
+        var enumerator = enumerable.GetEnumerator();
+        Assert.True(enumerator.MoveNext());
+        Assert.Equal(2, enumerator.Current);
+        Assert.True(enumerator.MoveNext());
+        Assert.Equal(1, enumerator.Current);
+        Assert.True(enumerator.MoveNext());
+        Assert.Equal(3, enumerator.Current);
+        Assert.False(enumerator.MoveNext());
     }
 
     [Fact(Skip = "Remove this Skip property to run this test")]
@@ -56,28 +65,22 @@ public void From_enumerable()
         Assert.Equal(2, list.Next.Next.Next.Next.Value);
     }
 
-    [Theory(Skip = "Remove this Skip property to run this test")]
-    [InlineData(1)]
-    [InlineData(2)]
-    [InlineData(10)]
-    [InlineData(100)]
-    public void Reverse(int length)
+    [Fact(Skip = "Remove this Skip property to run this test")]
+    public void Reverse()
     {
-        var values = Enumerable.Range(1, length).ToArray();
+        var values = Enumerable.Range(1, 5).ToArray();
         var list = new SimpleLinkedList<int>(values);
-        var reversed = list.Reverse();
+        var enumerable = Assert.IsAssignableFrom<IEnumerable<int>>(list);    
+        var reversed = enumerable.Reverse();
         Assert.Equal(values.Reverse(), reversed);
     }
 
-    [Theory(Skip = "Remove this Skip property to run this test")]
-    [InlineData(1)]
-    [InlineData(2)]
-    [InlineData(10)]
-    [InlineData(100)]
-    public void Roundtrip(int length)
+    [Fact(Skip = "Remove this Skip property to run this test")]
+    public void Roundtrip()
     {
-        var values = Enumerable.Range(1, length);
-        var listValues = new SimpleLinkedList<int>(values);
-        Assert.Equal(values, listValues);
+        var values = Enumerable.Range(1, 7);
+        var list = new SimpleLinkedList<int>(values);
+        var enumerable = Assert.IsAssignableFrom<IEnumerable<int>>(list);    
+        Assert.Equal(values, enumerable);
     }
 }
\ No newline at end of file