diff --git a/Dapper.Tests/Tests.Async.cs b/Dapper.Tests/Tests.Async.cs
index 05361503fa546333a8b26c7be53ef8d1cc21841e..c61753e169f685a454c950498db9a2d7787f7b6a 100644
--- a/Dapper.Tests/Tests.Async.cs
+++ b/Dapper.Tests/Tests.Async.cs
@@ -30,14 +30,14 @@ public async Task TestBasicStringUsageQueryFirstAsync()
         [Fact]
         public async Task TestBasicStringUsageQueryFirstOrDefaultAsync()
         {
-            var str = await connection.QueryFirstOrDefaultAsync<string>(new CommandDefinition("select null as [Value]"));
+            var str = await connection.QueryFirstOrDefaultAsync<string>(new CommandDefinition("select null as [Value] union all select @txt", new {txt = "def"}));
             str.IsNull();
         }
 
         [Fact]
         public async Task TestBasicStringUsageQuerySingleAsync()
         {
-            var str = await connection.QuerySingleAsync<string>(new CommandDefinition("select 'abc' as [Value] union all select @txt", new {txt = "def"}));
+            var str = await connection.QuerySingleAsync<string>(new CommandDefinition("select 'abc' as [Value]"));
             str.IsEqualTo("abc");
         }