diff --git a/src/Chapter18.Tests/Listing18.06.Tests.cs b/src/Chapter18.Tests/Listing18.06.Tests.cs
new file mode 100644
index 000000000..d93ac1489
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.06.Tests.cs
@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_06.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"Type parameter: System.Int32";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter18.Tests/Listing18.16.Tests.cs b/src/Chapter18.Tests/Listing18.16.Tests.cs
new file mode 100644
index 000000000..c56636e37
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.16.Tests.cs
@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_16.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"Help(?)";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter18.Tests/Listing18.24.Tests.cs b/src/Chapter18.Tests/Listing18.24.Tests.cs
new file mode 100644
index 000000000..17ee040ca
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.24.Tests.cs
@@ -0,0 +1,19 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_24.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"Begin...
+MethodA() executing...
+End...";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter18.Tests/Listing18.26.Tests.cs b/src/Chapter18.Tests/Listing18.26.Tests.cs
new file mode 100644
index 000000000..64771a207
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.26.Tests.cs
@@ -0,0 +1,18 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_26.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            string expected = $@"Hello!  My name is Inigo Montoya
+{140.6} makes for a long triathlon.";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter18.Tests/Listing18.27.Tests.cs b/src/Chapter18.Tests/Listing18.27.Tests.cs
new file mode 100644
index 000000000..5e2558e2b
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.27.Tests.cs
@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_27.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"InigoMontoya";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter18.Tests/Listing18.28.Tests.cs b/src/Chapter18.Tests/Listing18.28.Tests.cs
new file mode 100644
index 000000000..415a87f25
--- /dev/null
+++ b/src/Chapter18.Tests/Listing18.28.Tests.cs
@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter18.Listing18_28.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"Inigo Montoya";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Chapter19.Tests/Listing19.06.Tests.cs b/src/Chapter19.Tests/Listing19.06.Tests.cs
new file mode 100644
index 000000000..0643e0015
--- /dev/null
+++ b/src/Chapter19.Tests/Listing19.06.Tests.cs
@@ -0,0 +1,17 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter19.Listing19_06.Tests
+{
+    [TestClass]
+    public class ProgramTests
+    {
+        [TestMethod]
+        public void MainTest()
+        {
+            const string expected = @"ERROR: Operation is not valid due to the current state of the object.";
+
+            IntelliTect.TestTools.Console.ConsoleAssert.Expect(
+                expected, Program.Main);
+        }
+    }
+}
\ No newline at end of file