diff --git a/ThScoreFileConverter.Core.Tests/ThScoreFileConverter.Core.Tests.csproj b/ThScoreFileConverter.Core.Tests/ThScoreFileConverter.Core.Tests.csproj
index 9c0b6798..39e88eae 100644
--- a/ThScoreFileConverter.Core.Tests/ThScoreFileConverter.Core.Tests.csproj
+++ b/ThScoreFileConverter.Core.Tests/ThScoreFileConverter.Core.Tests.csproj
@@ -15,7 +15,7 @@
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       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
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diff --git a/ThScoreFileConverter.Tests/ThScoreFileConverter.Tests.csproj b/ThScoreFileConverter.Tests/ThScoreFileConverter.Tests.csproj
index 9f2839f1..9ad8f54b 100644
--- a/ThScoreFileConverter.Tests/ThScoreFileConverter.Tests.csproj
+++ b/ThScoreFileConverter.Tests/ThScoreFileConverter.Tests.csproj
@@ -23,7 +23,7 @@
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       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
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