diff --git a/.github/workflows/smoketest-dotnet-isolated-v4.yml b/.github/workflows/smoketest-dotnet-isolated-v4.yml
index d6f93b8e2..64dd0113c 100644
--- a/.github/workflows/smoketest-dotnet-isolated-v4.yml
+++ b/.github/workflows/smoketest-dotnet-isolated-v4.yml
@@ -77,6 +77,7 @@ jobs:
   
     # Run smoke tests
     - name: Run smoke tests
+      shell: pwsh
       run: azurite --silent --blobPort 10000 --queuePort 10001 --tablePort 10002 &
         cd ./test/SmokeTests/OOProcSmokeTests/DotNetIsolated && func host start &
         ./test/SmokeTests/OOProcSmokeTests/DotNetIsolated/run-smoke-tests.ps1 -HttpStartPath api/durable_HttpStartTimeoutOrchestrator