diff --git a/src/AStar.Dev.Utilities/AStar.Dev.Utilities.csproj b/src/AStar.Dev.Utilities/AStar.Dev.Utilities.csproj
index dfb4b13..dced6f5 100644
--- a/src/AStar.Dev.Utilities/AStar.Dev.Utilities.csproj
+++ b/src/AStar.Dev.Utilities/AStar.Dev.Utilities.csproj
@@ -29,12 +29,12 @@
 	<RepositoryType>git</RepositoryType>
 	<PackageProjectUrl>https://github.com/jbarden/astar-dev-utilities</PackageProjectUrl>
 	<Description>A collection of useful utilities.</Description>
-	<Version>1.5.0</Version>
+	<Version>1.5.1</Version>
 	<Authors>AStar Development, Jason Barden</Authors>
 	<DocumentationFile>$(AssemblyName).xml</DocumentationFile>
 	<PackageIcon>AStar.png</PackageIcon>
 	<PackageRequireLicenseAcceptance>True</PackageRequireLicenseAcceptance>
-	<PackageReleaseNotes>version 1.5.0 contains the initial code port from the jbarden NuGet / GitHub organisations.</PackageReleaseNotes>
+	<PackageReleaseNotes>version 1.5.1 adds the missing tests, no functionality is affected.</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/AStar.Dev.Utilities/AStar.Dev.Utilities.xml b/src/AStar.Dev.Utilities/AStar.Dev.Utilities.xml
index 0814568..7f9b520 100644
--- a/src/AStar.Dev.Utilities/AStar.Dev.Utilities.xml
+++ b/src/AStar.Dev.Utilities/AStar.Dev.Utilities.xml
@@ -16,12 +16,10 @@
         </member>
         <member name="T:AStar.Utilities.EnumExtensions">
              <summary>
-            
              </summary>
         </member>
         <member name="M:AStar.Utilities.EnumExtensions.ParseEnum``1(System.String)">
              <summary>
-            
              </summary>
              <typeparam name="T"></typeparam>
              <param name="value"></param>
diff --git a/src/AStar.Dev.Utilities/Constants.cs b/src/AStar.Dev.Utilities/Constants.cs
index c2165c2..5467e67 100644
--- a/src/AStar.Dev.Utilities/Constants.cs
+++ b/src/AStar.Dev.Utilities/Constants.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
 
-namespace AStar.Utilities;
+namespace AStar.Dev.Utilities;
 
 /// <summary>
 /// The <see href="Constants"></see>see> class contains static / constant properties to simplify and centralise various settings.
diff --git a/src/AStar.Dev.Utilities/EnumExtensions.cs b/src/AStar.Dev.Utilities/EnumExtensions.cs
index 1b46cef..cb490d2 100644
--- a/src/AStar.Dev.Utilities/EnumExtensions.cs
+++ b/src/AStar.Dev.Utilities/EnumExtensions.cs
@@ -1,4 +1,4 @@
-namespace AStar.Utilities;
+namespace AStar.Dev.Utilities;
 
 /// <summary>
 ///
@@ -6,10 +6,11 @@
 public static class EnumExtensions
 {
     /// <summary>
-    ///
+    /// The ParseEnum method will parse the supplied string and return the matching enum value.
     /// </summary>
-    /// <typeparam name="T"></typeparam>
-    /// <param name="value"></param>
-    /// <returns></returns>
+    /// <typeparam name="T">The typeof of the expected enum.</typeparam>
+    /// <param name="value">The value to parse to the enum.</param>
+    /// <returns>The parsed value as the matching enum value.</returns>
+    /// <exception cref="ArgumentException">Thrown when the string is not a valid enum value.</exception>
     public static T ParseEnum<T>(this string value) => (T)Enum.Parse(typeof(T), value, true);
 }
diff --git a/src/AStar.Dev.Utilities/ObjectExtensions.cs b/src/AStar.Dev.Utilities/ObjectExtensions.cs
index f9dc415..8a7d16c 100644
--- a/src/AStar.Dev.Utilities/ObjectExtensions.cs
+++ b/src/AStar.Dev.Utilities/ObjectExtensions.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
 
-namespace AStar.Utilities;
+namespace AStar.Dev.Utilities;
 
 /// <summary>
 /// The <see cref="ObjectExtensions" /> class contains some useful methods to enable various tasks
diff --git a/src/AStar.Dev.Utilities/StringExtensions.cs b/src/AStar.Dev.Utilities/StringExtensions.cs
index 63aa841..7246b6b 100644
--- a/src/AStar.Dev.Utilities/StringExtensions.cs
+++ b/src/AStar.Dev.Utilities/StringExtensions.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
 
-namespace AStar.Utilities;
+namespace AStar.Dev.Utilities;
 
 /// <summary>
 /// The <see cref="StringExtensions" /> class contains some useful methods to enable checks to be
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/AStar.Dev.Utilities.Unit.Tests.csproj b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AStar.Dev.Utilities.Unit.Tests.csproj
index 8bca3ab..0f44757 100644
--- a/tests/unit/AStar.Dev.Utilities.Unit.Tests/AStar.Dev.Utilities.Unit.Tests.csproj
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AStar.Dev.Utilities.Unit.Tests.csproj
@@ -14,6 +14,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
+    <PackageReference Include="FluentAssertions" Version="6.12.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
@@ -27,6 +28,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Using Include="FluentAssertions" />
     <Using Include="Xunit" />
   </ItemGroup>
 
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyClass.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyClass.cs
new file mode 100644
index 0000000..0b94202
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyClass.cs
@@ -0,0 +1,8 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+internal class AnyClass
+{
+    public int AnyInt { get; set; }
+
+    public string AnyString { get; set; } = string.Empty;
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyEnum.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyEnum.cs
new file mode 100644
index 0000000..96f084a
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/AnyEnum.cs
@@ -0,0 +1,7 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+internal enum AnyEnum
+{
+    NotDefined,
+    Defined
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/ConstantsShould.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/ConstantsShould.cs
new file mode 100644
index 0000000..f87f168
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/ConstantsShould.cs
@@ -0,0 +1,11 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+public class ConstantsShould
+{
+    [Fact]
+    public void ContainTheExpectedWebDeserialisationSettingsSetting()
+        => Constants.WebDeserialisationSettings
+                        .ToJson()
+                        .Should()
+                        .Be("{\"Converters\":[],\"TypeInfoResolver\":null,\"TypeInfoResolverChain\":[],\"AllowTrailingCommas\":false,\"DefaultBufferSize\":16384,\"Encoder\":null,\"DictionaryKeyPolicy\":null,\"IgnoreNullValues\":false,\"DefaultIgnoreCondition\":0,\"NumberHandling\":1,\"PreferredObjectCreationHandling\":0,\"IgnoreReadOnlyProperties\":false,\"IgnoreReadOnlyFields\":false,\"IncludeFields\":false,\"MaxDepth\":0,\"PropertyNamingPolicy\":{},\"PropertyNameCaseInsensitive\":true,\"ReadCommentHandling\":0,\"UnknownTypeHandling\":0,\"UnmappedMemberHandling\":0,\"WriteIndented\":false,\"ReferenceHandler\":null,\"IsReadOnly\":false}");
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/EnumExtensionsShould.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/EnumExtensionsShould.cs
new file mode 100644
index 0000000..62e3185
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/EnumExtensionsShould.cs
@@ -0,0 +1,16 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+public class EnumExtensionsShould
+{
+    [Fact]
+    public void ContainTheParseMethodReturningTheExpectedValue()
+            => "Defined".ParseEnum<AnyEnum>().Should().Be(AnyEnum.Defined);
+
+    [Fact]
+    public void ContainTheParseMethodWhichThrowsArgumentExceptionWhenTheValueIsNotFound()
+    {
+        Action parseStringAction = () => "ThisDoesntExitst".ParseEnum<AnyEnum>();
+
+        _ = parseStringAction.Should().Throw<ArgumentException>();
+    }
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/ObjectExtensionsShould.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/ObjectExtensionsShould.cs
new file mode 100644
index 0000000..11a52f5
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/ObjectExtensionsShould.cs
@@ -0,0 +1,10 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+public class ObjectExtensionsShould
+{
+    [Fact]
+    public void ContainTheToJsonMethodWhichReturnsTheExpectedString()
+        => ObjectExtensions
+                .ToJson(new AnyClass())
+                .Should().Be("{\"AnyInt\":0,\"AnyString\":\"\"}");
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/StringExtensionsShould.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/StringExtensionsShould.cs
new file mode 100644
index 0000000..5943c47
--- /dev/null
+++ b/tests/unit/AStar.Dev.Utilities.Unit.Tests/StringExtensionsShould.cs
@@ -0,0 +1,33 @@
+namespace AStar.Dev.Utilities.Unit.Tests;
+
+public class StringExtensionsShould
+{
+    private readonly string? nullString = null;
+    private readonly string notNullString = "value does not matter";
+    private readonly string whitespaceString = " ";
+    private readonly string anyJson = "{\"AnyInt\":0,\"AnyString\":\"\"}";
+
+    [Fact]
+    public void ContainTheIsNullMethodWhichReturnsTheResult()
+        => nullString.IsNull().Should().BeTrue();
+
+    [Fact]
+    public void ContainTheIsNotNullMethodWhichReturnsTheResult()
+        => notNullString.IsNotNull().Should().BeTrue();
+
+    [Fact]
+    public void ContainTheIsNullOrWhiteSpaceMethodWhichReturnsTheResult()
+        => whitespaceString.IsNullOrWhiteSpace().Should().BeTrue();
+
+    [Fact]
+    public void ContainTheIsNotNullOrWhiteSpaceMethodWhichReturnsTheResult()
+        => notNullString.IsNotNullOrWhiteSpace().Should().BeTrue();
+
+    [Fact]
+    public void ContainTheFromJsonMethodWhichReturnsTheResult()
+        => anyJson.FromJson<AnyClass>().Should().BeEquivalentTo<AnyClass>(new() { });
+
+    [Fact]
+    public void ContainTheFromJsonTakingJsonSerializerOptionsMethodWhichReturnsTheResult()
+        => anyJson.FromJson<AnyClass>(new()).Should().BeEquivalentTo<AnyClass>(new() { });
+}
diff --git a/tests/unit/AStar.Dev.Utilities.Unit.Tests/UnitTest1.cs b/tests/unit/AStar.Dev.Utilities.Unit.Tests/UnitTest1.cs
deleted file mode 100644
index 6386f98..0000000
--- a/tests/unit/AStar.Dev.Utilities.Unit.Tests/UnitTest1.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-namespace AStar.Dev.Utilities.Unit.Tests;
-
-public class UnitTest1
-{
-    [Fact]
-    public void Test1()
-    {
-
-    }
-}
\ No newline at end of file