diff --git a/.github/workflows/System.Waf.CI.yml b/.github/workflows/System.Waf.CI.yml
index 4ca9875a..6eff42dc 100644
--- a/.github/workflows/System.Waf.CI.yml
+++ b/.github/workflows/System.Waf.CI.yml
@@ -28,7 +28,7 @@ jobs:
 
     - name: 🕵️ Test
       run: |
-        echo "##🕵️ Test Results - System.Waf.sln" >> $GITHUB_STEP_SUMMARY
+        echo "##🕵️ Test Results - System.Waf.sln" >> $Env:$GITHUB_STEP_SUMMARY
         dotnet test ./src/System.Waf/System.Waf.sln -c Release --no-build --logger GitHubActions
 
     - name: 📦 Upload NuGet Packages
@@ -42,7 +42,7 @@ jobs:
 
     - name: 🖥️ UI Test
       run: |
-        echo "##🕵️ Test Results - Samples.UITest.sln" >> $GITHUB_STEP_SUMMARY
+        echo "##🕵️ Test Results - Samples.UITest.sln" >> $Env:$GITHUB_STEP_SUMMARY
         dotnet test ./src/Samples.UITest/Samples.UITest.sln --logger GitHubActions -maxCpuCount:1
     
     - name: 📦 Upload UI Test results