diff --git a/ABM/ABM.Core.UnitTests/ABM.Core.UnitTests.vbproj b/ABM/ABM.Core.UnitTests/ABM.Core.UnitTests.vbproj
index 26891365..587a469a 100644
--- a/ABM/ABM.Core.UnitTests/ABM.Core.UnitTests.vbproj
+++ b/ABM/ABM.Core.UnitTests/ABM.Core.UnitTests.vbproj
@@ -73,15 +73,15 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Microsoft.TestPlatform.CoreUtilities, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.4.0\lib\net462\Microsoft.TestPlatform.CoreUtilities.dll</HintPath>
+      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.5.1\lib\net462\Microsoft.TestPlatform.CoreUtilities.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Microsoft.TestPlatform.PlatformAbstractions, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.4.0\lib\net462\Microsoft.TestPlatform.PlatformAbstractions.dll</HintPath>
+      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.5.1\lib\net462\Microsoft.TestPlatform.PlatformAbstractions.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Microsoft.VisualStudio.TestPlatform.ObjectModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.4.0\lib\net462\Microsoft.VisualStudio.TestPlatform.ObjectModel.dll</HintPath>
+      <HintPath>..\packages\Microsoft.TestPlatform.ObjectModel.18.5.1\lib\net462\Microsoft.VisualStudio.TestPlatform.ObjectModel.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System" />
diff --git a/ABM/ABM.Core.UnitTests/packages.config b/ABM/ABM.Core.UnitTests/packages.config
index aaead7bb..2a5bf290 100644
--- a/ABM/ABM.Core.UnitTests/packages.config
+++ b/ABM/ABM.Core.UnitTests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.TestPlatform.ObjectModel" version="18.4.0" targetFramework="net472" />
+  <package id="Microsoft.TestPlatform.ObjectModel" version="18.5.1" targetFramework="net472" />
   <package id="System.Buffers" version="4.6.1" targetFramework="net472" />
   <package id="System.Collections.Immutable" version="10.0.6" targetFramework="net472" />
   <package id="System.Memory" version="4.6.3" targetFramework="net472" />