diff --git a/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerAuditSinkTests.cs b/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerAuditSinkTests.cs
index 4afebc9..33389ad 100644
--- a/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerAuditSinkTests.cs
+++ b/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerAuditSinkTests.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Data;
 using Moq;
 using Serilog.Events;
 using Serilog.Parsing;
@@ -157,6 +156,16 @@ public void EmitCallsSqlLogEventWriter()
             _sqlLogEventWriter.Verify(w => w.WriteEvent(logEvent), Times.Once);
         }
 
+        [Fact]
+        public void OnDisposeDisposesSqlLogEventWriterDependency()
+        {
+            // Arrange + act
+            using (new MSSqlServerAuditSink(_sinkOptions, _columnOptions, _sinkDependencies)) { }
+
+            // Assert
+            _sqlLogEventWriter.Verify(w => w.Dispose(), Times.Once);
+        }
+
         private void SetupSut(bool autoCreateSqlDatabase = false, bool autoCreateSqlTable = false)
         {
             _sinkOptions.AutoCreateSqlDatabase = autoCreateSqlDatabase;
diff --git a/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerSinkTests.cs b/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerSinkTests.cs
index 9c2b9a6..f6a6b01 100644
--- a/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerSinkTests.cs
+++ b/test/Serilog.Sinks.MSSqlServer.Tests/Sinks/MSSqlServer/MSSqlServerSinkTests.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Data;
 using System.Threading.Tasks;
 using Moq;
 using Serilog.Events;
@@ -185,6 +184,26 @@ public void OnEmptyBatchAsyncReturnsCompletedTask()
             Assert.True(task.IsCompleted);
         }
 
+        [Fact]
+        public void OnDisposeDisposesSqlBulkBatchWriterDependency()
+        {
+            // Arrange + act
+            using (new MSSqlServerSink(_sinkOptions, _sinkDependencies)) { }
+
+            // Assert
+            _sqlBulkBatchWriter.Verify(w => w.Dispose(), Times.Once);
+        }
+
+        [Fact]
+        public void OnDisposeDisposesSqlLogEventWriterDependency()
+        {
+            // Arrange + act
+            using (new MSSqlServerSink(_sinkOptions, _sinkDependencies)) { }
+
+            // Assert
+            _sqlLogEventWriter.Verify(w => w.Dispose(), Times.Once);
+        }
+
         private void SetupSut(
             bool autoCreateSqlDatabase = false,
             bool autoCreateSqlTable = false,