diff --git a/FluentAssertions.Mockly.ApiVerificationTests/FluentAssertions.Mockly.ApiVerificationTests.csproj b/FluentAssertions.Mockly.ApiVerificationTests/FluentAssertions.Mockly.ApiVerificationTests.csproj
index f7c00bb..bd870a5 100644
--- a/FluentAssertions.Mockly.ApiVerificationTests/FluentAssertions.Mockly.ApiVerificationTests.csproj
+++ b/FluentAssertions.Mockly.ApiVerificationTests/FluentAssertions.Mockly.ApiVerificationTests.csproj
@@ -12,7 +12,7 @@
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     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
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       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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diff --git a/FluentAssertions.Mockly.v7.Specs/FluentAssertions.Mockly.v7.Specs.csproj b/FluentAssertions.Mockly.v7.Specs/FluentAssertions.Mockly.v7.Specs.csproj
index 3516607..8a0b65d 100644
--- a/FluentAssertions.Mockly.v7.Specs/FluentAssertions.Mockly.v7.Specs.csproj
+++ b/FluentAssertions.Mockly.v7.Specs/FluentAssertions.Mockly.v7.Specs.csproj
@@ -24,7 +24,7 @@
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-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
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       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
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diff --git a/FluentAssertions.Mockly.v8.Specs/FluentAssertions.Mockly.v8.Specs.csproj b/FluentAssertions.Mockly.v8.Specs/FluentAssertions.Mockly.v8.Specs.csproj
index 2f9364c..e4c5823 100644
--- a/FluentAssertions.Mockly.v8.Specs/FluentAssertions.Mockly.v8.Specs.csproj
+++ b/FluentAssertions.Mockly.v8.Specs/FluentAssertions.Mockly.v8.Specs.csproj
@@ -24,7 +24,7 @@
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