diff --git a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs
index eb07118063e..589b361cdb2 100644
--- a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs
+++ b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs
@@ -180,7 +180,7 @@ public void CheckIncludedNativeLibraries ([Values (true, false)] bool compressNa
 			proj.PackageReferences.Add(KnownPackages.SQLitePCLRaw_Core);
 			proj.SetProperty ("AndroidUseAapt2", useAapt2.ToString ());
 			proj.SetProperty(proj.ReleaseProperties, KnownProperties.AndroidSupportedAbis, "x86");
-			proj.SetProperty (proj.ReleaseProperties, "AndroidStoreUncompressedFileExtensions", compressNativeLibraries ? "" : ".so");
+			proj.SetProperty (proj.ReleaseProperties, "AndroidStoreUncompressedFileExtensions", compressNativeLibraries ? "" : "so");
 			using (var b = CreateApkBuilder (Path.Combine ("temp", TestContext.CurrentContext.Test.Name))) {
 				b.Verbosity = Microsoft.Build.Framework.LoggerVerbosity.Diagnostic;
 				b.ThrowOnBuildFailure = false;