diff --git a/.github/workflows/scalar-functional-tests.yml b/.github/workflows/scalar-functional-tests.yml
index 6bf972709ab031..2050d8ff7eb6aa 100644
--- a/.github/workflows/scalar-functional-tests.yml
+++ b/.github/workflows/scalar-functional-tests.yml
@@ -126,7 +126,7 @@ jobs:
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '3.1.x'
+          dotnet-version: '3.1.426'
 
       - name: Install dependencies
         run: dotnet restore