diff --git a/src/IDisposableGenerator/DisposableCodeWriter.cs b/src/IDisposableGenerator/DisposableCodeWriter.cs
index 9ba90e7..0eba3b3 100644
--- a/src/IDisposableGenerator/DisposableCodeWriter.cs
+++ b/src/IDisposableGenerator/DisposableCodeWriter.cs
@@ -60,7 +60,7 @@ If Not Me.isDisposed AndAlso disposing Then
 
                 if (classItem.Owns.Any())
                 {
-                    _ = sourceBuilder.Append($@"                If Me.{(classItem.Stream ? "KeepOpen" : "IsOwned")} Then
+                    _ = sourceBuilder.Append($@"                If {(classItem.Stream ? "Not Me.KeepOpen" : "Me.IsOwned")} Then
 ");
                     foreach (var ownedItem in classItem.Owns)
                     {
@@ -171,7 +171,7 @@ namespace {workItem.Namespace};
 
                 if (classItem.Owns.Any())
                 {
-                    _ = sourceBuilder.Append($@"            if (this.{(classItem.Stream ? "KeepOpen" : "IsOwned")})
+                    _ = sourceBuilder.Append($@"            if ({(classItem.Stream ? "!this.KeepOpen" : "this.IsOwned")})
             {{
 ");
                     foreach (var ownedItem in classItem.Owns)
@@ -285,7 +285,7 @@ namespace {workItem.Namespace}
 
                 if (classItem.Owns.Any())
                 {
-                    _ = sourceBuilder.Append($@"                if (this.{(classItem.Stream ? "KeepOpen" : "IsOwned")})
+                    _ = sourceBuilder.Append($@"                if ({(classItem.Stream ? "!this.KeepOpen" : "this.IsOwned")})
                 {{
 ");
                     foreach (var ownedItem in classItem.Owns)
diff --git a/tests/IDisposableGeneratorTests.CSharp10.cs b/tests/IDisposableGeneratorTests.CSharp10.cs
index 9862862..feee154 100644
--- a/tests/IDisposableGeneratorTests.CSharp10.cs
+++ b/tests/IDisposableGeneratorTests.CSharp10.cs
@@ -198,7 +198,7 @@ protected override void Dispose(bool disposing)
     {
         if (!this.isDisposed && disposing)
         {
-            if (this.KeepOpen)
+            if (!this.KeepOpen)
             {
                 this.testDispose?.Dispose();
                 this.testDispose = null;
diff --git a/tests/IDisposableGeneratorTests.CSharp9.cs b/tests/IDisposableGeneratorTests.CSharp9.cs
index 67350ba..2cf649f 100644
--- a/tests/IDisposableGeneratorTests.CSharp9.cs
+++ b/tests/IDisposableGeneratorTests.CSharp9.cs
@@ -216,7 +216,7 @@ protected override void Dispose(bool disposing)
         {
             if (!this.isDisposed && disposing)
             {
-                if (this.KeepOpen)
+                if (!this.KeepOpen)
                 {
                     this.testDispose?.Dispose();
                     this.testDispose = null;
diff --git a/tests/IDisposableGeneratorTests.VisualBasic.cs b/tests/IDisposableGeneratorTests.VisualBasic.cs
index 289c188..88a9741 100644
--- a/tests/IDisposableGeneratorTests.VisualBasic.cs
+++ b/tests/IDisposableGeneratorTests.VisualBasic.cs
@@ -243,7 +243,7 @@ Friend ReadOnly Property KeepOpen As Boolean
         ''' <inheritdoc/>
         Protected Overrides Sub Dispose(ByVal disposing As Boolean)
             If Not Me.isDisposed AndAlso disposing Then
-                If Me.KeepOpen Then
+                If Not Me.KeepOpen Then
                     Me.testDispose?.Dispose()
                     Me.testDispose = Nothing
                 End If
diff --git a/tests/IDisposableGeneratorTests.cs b/tests/IDisposableGeneratorTests.cs
index b7f7f25..cce8ab3 100644
--- a/tests/IDisposableGeneratorTests.cs
+++ b/tests/IDisposableGeneratorTests.cs
@@ -4,10 +4,7 @@ public partial class IDisposableGeneratorTests
 {
     [Fact]
     public async Task TestGeneratingNoInput()
-        => _ = await Assert.ThrowsAsync<EqualWithMessageException>([ExcludeFromCodeCoverage] async () =>
-        {
-            await RunTest<CSGeneratorTest>(string.Empty, string.Empty).ConfigureAwait(false);
-        }).ConfigureAwait(false);
+        => await RunTest<CSGeneratorTest>(string.Empty, string.Empty).ConfigureAwait(false);
 
     private static async Task RunTest<TestType>(
         string generatedSource,
@@ -34,9 +31,8 @@ private static async Task RunTest<TestType>(
             case false when test is CSGeneratorTest tst:
             {
                 tst.LanguageVersion = languageVersion!.Value;
-                var generatedAttributeSource = Properties.Resources.AttributeCodeCSharp!;
                 test.TestState.GeneratedSources.Add(
-                    (typeof(IDisposableGenerator), "GeneratedAttributes.g.cs", generatedAttributeSource));
+                    (typeof(IDisposableGenerator), "GeneratedAttributes.g.cs", Properties.Resources.AttributeCodeCSharp!));
                 if (generatedSources is not null
                     && languageVersion == LanguageVersion.CSharp10)
                 {
@@ -61,14 +57,15 @@ private static async Task RunTest<TestType>(
             }
             case false when test is VBGeneratorTest:
             {
-                var generatedAttributeSource = Properties.Resources.AttributeCodeVisualBasic!;
                 test.TestState.GeneratedSources.Add(
-                    (typeof(IDisposableGeneratorVB), "GeneratedAttributes.g.vb", generatedAttributeSource));
+                    (typeof(IDisposableGeneratorVB), "GeneratedAttributes.g.vb", Properties.Resources.AttributeCodeVisualBasic!));
                 test.TestState.GeneratedSources.Add(
                     (typeof(IDisposableGeneratorVB), "Disposables.g.vb", generatedSource));
                 break;
             }
             default:
+                test.TestState.GeneratedSources.Add(
+                    (typeof(IDisposableGenerator), "GeneratedAttributes.g.cs", Properties.Resources.AttributeCodeCSharp!));
                 test.TestState.Sources.Clear();
                 break;
         }