diff --git a/tests/LocalAppVeyor.Engine.UnitTests/LocalAppVeyor.Engine.UnitTests.csproj b/tests/LocalAppVeyor.Engine.UnitTests/LocalAppVeyor.Engine.UnitTests.csproj
index dfbf769..a60d55c 100644
--- a/tests/LocalAppVeyor.Engine.UnitTests/LocalAppVeyor.Engine.UnitTests.csproj
+++ b/tests/LocalAppVeyor.Engine.UnitTests/LocalAppVeyor.Engine.UnitTests.csproj
@@ -11,7 +11,7 @@
 
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+    <PackageReference Include="System.IO.Abstractions.TestingHelpers" Version="21.1.3" />
     <PackageReference Include="xunit" Version="2.6.4" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
diff --git a/tests/LocalAppVeyor.Engine.UnitTests/packages.lock.json b/tests/LocalAppVeyor.Engine.UnitTests/packages.lock.json
index f72b110..ff1016e 100644
--- a/tests/LocalAppVeyor.Engine.UnitTests/packages.lock.json
+++ b/tests/LocalAppVeyor.Engine.UnitTests/packages.lock.json
@@ -32,11 +32,11 @@
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       "xunit": {
@@ -1772,24 +1772,24 @@
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