diff --git a/test/Microsoft.DotNet.Cli.Sln.Internal.Tests/Microsoft.DotNet.Cli.Sln.Internal.Tests.csproj b/test/Microsoft.DotNet.Cli.Sln.Internal.Tests/Microsoft.DotNet.Cli.Sln.Internal.Tests.csproj
index 504b25c7b..339fbd222 100644
--- a/test/Microsoft.DotNet.Cli.Sln.Internal.Tests/Microsoft.DotNet.Cli.Sln.Internal.Tests.csproj
+++ b/test/Microsoft.DotNet.Cli.Sln.Internal.Tests/Microsoft.DotNet.Cli.Sln.Internal.Tests.csproj
@@ -33,7 +33,7 @@
       <Version>2.2.0-beta4-build1194</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/test/Microsoft.DotNet.Configurer.UnitTests/Microsoft.DotNet.Configurer.UnitTests.csproj b/test/Microsoft.DotNet.Configurer.UnitTests/Microsoft.DotNet.Configurer.UnitTests.csproj
index 4db883334..793b249b9 100644
--- a/test/Microsoft.DotNet.Configurer.UnitTests/Microsoft.DotNet.Configurer.UnitTests.csproj
+++ b/test/Microsoft.DotNet.Configurer.UnitTests/Microsoft.DotNet.Configurer.UnitTests.csproj
@@ -46,7 +46,7 @@
       <Version>4.3.0</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
     <PackageReference Include="moq.netcore">
       <Version>4.4.0-beta8</Version>
diff --git a/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Microsoft.DotNet.ProjectJsonMigration.Tests.csproj b/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Microsoft.DotNet.ProjectJsonMigration.Tests.csproj
index 3adb8f19b..0b76dd001 100644
--- a/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Microsoft.DotNet.ProjectJsonMigration.Tests.csproj
+++ b/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Microsoft.DotNet.ProjectJsonMigration.Tests.csproj
@@ -50,7 +50,7 @@
       <Version>2.2.0-beta4-build3444</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
     <PackageReference Include="moq.netcore">
       <Version>4.4.0-beta8</Version>
diff --git a/test/Microsoft.DotNet.Tools.Tests.Utilities/Microsoft.DotNet.Tools.Tests.Utilities.csproj b/test/Microsoft.DotNet.Tools.Tests.Utilities/Microsoft.DotNet.Tools.Tests.Utilities.csproj
index 44d281ef5..3f4dfe997 100644
--- a/test/Microsoft.DotNet.Tools.Tests.Utilities/Microsoft.DotNet.Tools.Tests.Utilities.csproj
+++ b/test/Microsoft.DotNet.Tools.Tests.Utilities/Microsoft.DotNet.Tools.Tests.Utilities.csproj
@@ -21,7 +21,7 @@
       <Version>1.6.0</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.NETCore.App">
       <Version>1.1.0</Version>
diff --git a/test/Msbuild.Tests.Utilities/Msbuild.Tests.Utilities.csproj b/test/Msbuild.Tests.Utilities/Msbuild.Tests.Utilities.csproj
index f06f2124f..91dbcc61a 100644
--- a/test/Msbuild.Tests.Utilities/Msbuild.Tests.Utilities.csproj
+++ b/test/Msbuild.Tests.Utilities/Msbuild.Tests.Utilities.csproj
@@ -34,7 +34,7 @@
       <Version>4.3.0</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
     <PackageReference Include="xunit">
       <Version>2.2.0-beta4-build3444</Version>
diff --git a/test/dotnet-list-reference.Tests/dotnet-list-reference.Tests.csproj b/test/dotnet-list-reference.Tests/dotnet-list-reference.Tests.csproj
index aa2ce2968..4fbc41e22 100644
--- a/test/dotnet-list-reference.Tests/dotnet-list-reference.Tests.csproj
+++ b/test/dotnet-list-reference.Tests/dotnet-list-reference.Tests.csproj
@@ -45,7 +45,7 @@
       <Version>2.2.0-beta4-build3444</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
   </ItemGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
diff --git a/test/dotnet-migrate.Tests/dotnet-migrate.Tests.csproj b/test/dotnet-migrate.Tests/dotnet-migrate.Tests.csproj
index 3455a4855..64e43d38a 100644
--- a/test/dotnet-migrate.Tests/dotnet-migrate.Tests.csproj
+++ b/test/dotnet-migrate.Tests/dotnet-migrate.Tests.csproj
@@ -54,7 +54,7 @@
       <Version>2.2.0-beta4-build3444</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
     <PackageReference Include="moq.netcore">
       <Version>4.4.0-beta8</Version>
diff --git a/test/dotnet-remove-reference.Tests/dotnet-remove-reference.Tests.csproj b/test/dotnet-remove-reference.Tests/dotnet-remove-reference.Tests.csproj
index f05420652..a339974dd 100644
--- a/test/dotnet-remove-reference.Tests/dotnet-remove-reference.Tests.csproj
+++ b/test/dotnet-remove-reference.Tests/dotnet-remove-reference.Tests.csproj
@@ -48,7 +48,7 @@
       <Version>$(CLI_MSBuild_Version)</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
   </ItemGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
diff --git a/test/dotnet-restore.Tests/dotnet-restore.Tests.csproj b/test/dotnet-restore.Tests/dotnet-restore.Tests.csproj
index cf55f7b8b..2cc814fb5 100644
--- a/test/dotnet-restore.Tests/dotnet-restore.Tests.csproj
+++ b/test/dotnet-restore.Tests/dotnet-restore.Tests.csproj
@@ -58,7 +58,7 @@
       <Version>1.1.0</Version>
     </PackageReference>
     <PackageReference Include="FluentAssertions">
-      <Version>4.0.0</Version>
+      <Version>4.18.0</Version>
     </PackageReference>
   </ItemGroup>