diff --git a/eng/pipelines/templates/jobs/sdk-diff-tests.yml b/eng/pipelines/templates/jobs/sdk-diff-tests.yml
index f135ab727..afea9f2b1 100644
--- a/eng/pipelines/templates/jobs/sdk-diff-tests.yml
+++ b/eng/pipelines/templates/jobs/sdk-diff-tests.yml
@@ -94,7 +94,8 @@ jobs:
 
       sdk_tarball_name=$(find "$(Pipeline.Workspace)/Artifacts" -name "dotnet-sdk-*-${{ parameters.targetRid }}.tar.gz" -exec basename {} \;)
 
-      if [[ -z $sdk_tarball_name ]]; then
+      if [[ -z "$sdk_tarball_name" ]]; then
+
         fail "Source-build SDK tarball does not exist in '$(Pipeline.Workspace)/Artifacts'"
         exit 1
       fi