diff --git a/tests/Dapper.Tests/MiscTests.cs b/tests/Dapper.Tests/MiscTests.cs
index d1571e6c9..aef94823d 100644
--- a/tests/Dapper.Tests/MiscTests.cs
+++ b/tests/Dapper.Tests/MiscTests.cs
@@ -222,8 +222,6 @@ public async Task TestConversionExceptionMessages()
             Assert.Null(Assert.Single(list));
             list = await connection.QueryAsync<int?>(sql);
             Assert.Null(Assert.Single(list));
-            list = await connection.QueryAsync<int?>(sql);
-            Assert.Null(Assert.Single(list));
 
 #if NETCOREAPP3_1 || NET5_0
             list = await connection.StreamAsync<int?>(sql).ToListAsync();