diff --git a/src/NerdBank.GitVersioning.Tests/NerdBank.GitVersioning.Tests.csproj b/src/NerdBank.GitVersioning.Tests/NerdBank.GitVersioning.Tests.csproj
index 5819c885..9e4bd7ef 100644
--- a/src/NerdBank.GitVersioning.Tests/NerdBank.GitVersioning.Tests.csproj
+++ b/src/NerdBank.GitVersioning.Tests/NerdBank.GitVersioning.Tests.csproj
@@ -25,14 +25,13 @@
     <EmbeddedResource Include="ManagedGit\tree*" />
     <EmbeddedResource Include="test.vcprj" />
     <EmbeddedResource Include="test.prj" />
-    <EmbeddedResource Include="repos\submodules.7z" />
+    <EmbeddedResource Include="repos\*" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Nerdbank.GitVersioning.Tasks\Nerdbank.GitVersioning.Tasks.csproj" />
     <ProjectReference Include="..\NerdBank.GitVersioning\NerdBank.GitVersioning.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="7z.NET" Version="1.0.3" />
     <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.10" />
     <PackageReference Include="System.Collections.Immutable" Version="1.5.0" />
     <PackageReference Include="Microsoft.Build" Version="15.1.548" ExcludeAssets="runtime" />
diff --git a/src/NerdBank.GitVersioning.Tests/TestUtilities.cs b/src/NerdBank.GitVersioning.Tests/TestUtilities.cs
index dac1daec..a67edbd1 100644
--- a/src/NerdBank.GitVersioning.Tests/TestUtilities.cs
+++ b/src/NerdBank.GitVersioning.Tests/TestUtilities.cs
@@ -1,7 +1,4 @@
-#if NET461
-using SevenZipNET;
-#endif
-using Validation;
+using Validation;
 
 using System;
 using System.Collections.Generic;
@@ -67,36 +64,19 @@ internal static void ExtractEmbeddedResource(string resourcePath, string extract
 
     internal static ExpandedRepo ExtractRepoArchive(string repoArchiveName)
     {
-#if NET461
         string archiveFilePath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
         string expandedFolderPath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
 
-        ExtractEmbeddedResource($"repos.{repoArchiveName}.7z", archiveFilePath);
+        ExtractEmbeddedResource($"repos.{repoArchiveName}.zip", archiveFilePath);
         try
         {
-            for (int retryCount = 0; ; retryCount++)
-            {
-                try
-                {
-                    var extractor = new SevenZipExtractor(archiveFilePath);
-                    extractor.ExtractAll(expandedFolderPath);
-                    return new ExpandedRepo(expandedFolderPath);
-                }
-                catch (System.ComponentModel.Win32Exception) when (retryCount < 2)
-                {
-                }
-            }
+            System.IO.Compression.ZipFile.ExtractToDirectory(archiveFilePath, expandedFolderPath);
+            return new ExpandedRepo(expandedFolderPath);
         }
         finally
         {
-            if (File.Exists(archiveFilePath))
-            {
-                File.Delete(archiveFilePath);
-            }
+            File.Delete(archiveFilePath);
         }
-#else
-        throw new PlatformNotSupportedException();
-#endif
     }
 
     internal class ExpandedRepo : IDisposable
diff --git a/src/NerdBank.GitVersioning.Tests/repos/submodules.7z b/src/NerdBank.GitVersioning.Tests/repos/submodules.7z
deleted file mode 100644
index be5ac172..00000000
Binary files a/src/NerdBank.GitVersioning.Tests/repos/submodules.7z and /dev/null differ
diff --git a/src/NerdBank.GitVersioning.Tests/repos/submodules.zip b/src/NerdBank.GitVersioning.Tests/repos/submodules.zip
new file mode 100644
index 00000000..04488cb7
Binary files /dev/null and b/src/NerdBank.GitVersioning.Tests/repos/submodules.zip differ