diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 497e5a0bf..7a910196d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -47,7 +47,7 @@ jobs:
     - name: .NET Build
       run: dotnet build Build.csproj -c Release /p:CI=true
     - name: Dapper Tests
-      run: dotnet test tests/Dapper.Tests/Dapper.Tests.csproj -c Release --logger GitHubActions /p:CI=true
+      run: dotnet test tests/Dapper.Tests/Dapper.Tests.csproj -c Release --logger GitHubActions -p:CI=true -p:TestTfmsInParallel=false
       env:
         MySqlConnectionString: Server=localhost;Port=${{ job.services.mysql.ports[3306] }};Uid=root;Pwd=root;Database=test;Allow User Variables=true
         OLEDBConnectionString: Provider=SQLOLEDB;Server=tcp:localhost,${{ job.services.sqlserver.ports[1433] }};Database=tempdb;User Id=sa;Password=Password.;
diff --git a/build.ps1 b/build.ps1
index f406c745f..59193ff75 100644
--- a/build.ps1
+++ b/build.ps1
@@ -22,8 +22,8 @@ dotnet build ".\Build.csproj" -c Release /p:CI=true
 Write-Host "Done building." -ForegroundColor "Green"
 
 if ($RunTests) {
-    Write-Host "Running tests: Build.csproj traversal (all frameworks)" -ForegroundColor "Magenta"
-    dotnet test ".\Build.csproj" -c Release --no-build
+    Write-Host "Running tests: Build.csproj" -ForegroundColor "Magenta"
+    dotnet test ".\Build.csproj" -c Release --no-build -p:TestTfmsInParallel=false
     if ($LastExitCode -ne 0) {
         Write-Host "Error with tests, aborting build." -Foreground "Red"
         Exit 1