diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 4560f06..05aaf89 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -62,7 +62,7 @@ jobs:
           failed=0
           for tfm in "${frameworks[@]}"; do
             echo "::group::Testing $tfm"
-            if ! (cd src && dotnet test ByteAether.Ulid.slnx --configuration CI-Debug -p:ImplTargetFramework=$tfm --report-trx --report-trx-filename "results-$tfm.trx"); then
+            if ! (cd src && dotnet test ByteAether.Ulid.slnx --configuration CI-Debug -p:ImplTargetFramework=$tfm --results-directory "../TestResults"); then
               echo "❌ Tests failed for $tfm"
               failed=1
             fi
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 61464e5..50331e2 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -27,6 +27,8 @@
 
     <!-- Default to net10.0 if not specified via CLI -->
     <ImplTargetFramework Condition="'$(ImplTargetFramework)' == ''">net10.0</ImplTargetFramework>
+
+    <TestingPlatformCommandLineArguments>$(TestingPlatformCommandLineArguments) --report-trx --report-trx-filename $(MSBuildProjectName)-$(ImplTargetFramework).trx</TestingPlatformCommandLineArguments>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)' == 'CI-Release'"><Optimize>true</Optimize>